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I think maybe it's time for a battery tech roundup? I've lost track of all these battery types. How about following up on every single battery tech from the past few years, compare them on all their various metrics, fitness for various applications, see where they're at in terms of readiness, cost, and so on?

Gelion designing the one battery so that it uses the vast majority of the existing lead-acid battery manufacturing steps was a stroke of genius. Far, far too many potentially revolutionary battery technologies never make it out of the lab because they fail to make the jump to mass production, but I bet this one doesn't meet that same fate. The high functional temperature range and nonflammability are great, too, it means I could theoretically put one in my uninsulated garage and not care that the garage becomes an oven in the summer and a freezer in the winter. The thing would likely still work safely regardless.

The thing that sticks in my mind is the full discharge for dendrite removal. That’s the kind of thing set for a full battery management system with a bank of batteries. A system that could isolate a single battery at a time to take it through a full discharge cycle as part of an automated maintenance plan could extend the life of these batteries indefinitely… Promising ideas.

I worked at a Zinc Bromine flow battery company in 2006 and the Zinc Dendrite growth was a serious problem that became a showstopper. I hope that GELION has truly overcome this issue to make these real.

I absolutely love how you show your sources on screen. Such a simple thing to do, but so many content creators fail to back up their claims with even just a list of sources in the video description. It goes a long way to adding legitimacy to the presentation and I hope you know how much it is appreciated by so many of us.

This video makes several comparisons to lithium ion and flow batteries, but I think it would make much more sense to compare zinc-bromide to sodium ion, which is a much more direct competitor and also entering the market right now. They're both low-cost, lower-than-lithium density, and using more sustainable materials

I think this one's decided there Matt... As a half-Aussie I'm STOKED to see this coming out of Oz - it makes me so happy. God I hope they start pumping these out as fast as humanly possible, even if it's an evolving product. Use them for fixed location storage exclusively, standardise the installation and access mechanisms, get it into place in a practical sense and make sure the end client is aware it's a version 1.0 solution and will evolve/improve. Here in the UK we're running into grid problems (not just generation) and I have read that we may not be able to carry and deliver the power requirements for wider scale adoption of EVs mandated by soon-to-change regulations. We really really need distributed grid storage and rather badly... Australia has a strange mixture of savagely overpriced power (a side-effect of pseudo-competition overlaid on the old distribution structure) and power is monumentally more expensive than it should be; despite that they've endured brownouts and blackouts where there is no way that should be justified (this isn't a bushfire or flood thing, it's a government and mismanagement thing apparently). Imagine these popping up under houses and tied to domestic solar arrays, etc. - the amount of sunshine they get is hard to fathom. As for going outside - I know how those noodles in the microwave actually feel. The sun is harsh and relentless much of the time, if these really are much cheaper then the main problem will be getting your mitts on these batteries and infrastructure (God help you trying to find a licensed installer then). Not sure how many lead-acid plants we have in the UK but licensing that tech would probably make sense, even if it ends up being a stepping stone before fusion reactors take over the world (as the media claimed this morning) we really do need that interim step. Even more so if international tensions and war is on the horizon; this makes a grid vastly more difficult to knock out indeed. National grid resilience is just not sold hard enough by either the industry or government (against attack or disaster) and I really think we need to step that message up sharply. These types of devices are the meat and potatoes of making that happen, absolutely LOVE it.

I'm a big fan of this battery chemistry because of it's simplicity, durability, and safety. Zinc and Bromine are super common. It seems like a clear winner to me.

My family has some land in a rural area that has limited grid connection. I think this would be interesting to use up there, especially considering my dad is planning on installing a somewhat large solar array to power all of his buildings and machines. It's in Wisconsin though, so we get hot summers and cold winters. It'd be interesting to create our own grid up there. Maybe sell some power to the neighbors, lol.

I have a large lithium-ion DIY powerwall in it's 5th year of operation. Over the last 5 years, LifePo4 has taken DIY powerwalls by storm. A key difference between them is the voltage range. Lithium-ion has a relatively large (3.0v -> 4.2v) operating range so you can set max charge/discharge by voltage to manage DOD. LifePo4 has a very flat discharge curve which means it's preferred to do coulomb tracking instead of the simpler voltage approach to manage DOD. MY POINT: One thing you don't mention in these battery technology discussions is the voltage range - e.g. flat like LifePo4 or wider like Lithium-ion. And are they compatible with nominal 12v, 24v 48v systems. For example, lithium-ion does not work for 12v systems as neither 3s or 4s matches the voltage range of standard equipment properly - but does fine for 24v and 48v equipment. LifePo4 does all 3. I agree these are smaller points :) but I'd suggest that these youtubes are nerdy and the voltage range, 12/24/48v compatibility, BMSs available?, and cycles are of great interest to DIY folks like myself and would add interest in you're presentations.

Great video Matt. Its good to see this with the companies like Redflow having their products actually on the market, not just in labs/testing. These seem to make so much more sense for many non mobile storage solutions. They also had some good claims about losses when the battery was idle that seemed to be another real advantage over the lithium storage solutions. It seems like lithium is more riding a wave of popularity and more people need to be made aware of other solutions that may be more suitable for specific applications.

From the European point-of-view we seriously need to focus on energy storage that handles the "last mile" meaning distributing the energy storage as close to the homes as possible. Having a cheap, safe battery to put into basements and car parks is essential for this application. We cannot build the whole infra to handle EV cars and going "all electric", so we need to "trickle load" a very distributed energy storage that is as close to the homes and cars as possible. We also need a lot of storage as many countries have waaay over built wind energy.

Thomas Maschmeyer was one of my college professors - an absolute genius and a wonderful guy all round! So proud to see what he has pioneered within a fantastic team!

Man, Australia is really leading the way with battery tech. The aluminum-graphene battery was also developed there and it has massive potential. They're doing something right down under!

Still using a pair of 20 year old lead acid farm batteries at the old family camp with a 3kw inverter(newer) and some 20 year old 50w panels. These run a fridge and freezer year round, and all of other power needs when the camp is in use. Ive no doubt that about $400 of tractor grade batteries would anchor a small family home without struggle. The currently available tractor batteries at Tractor Supply Company cost about $3/kwh, and about 0.5 kwh per kg. They are heavy and bulky for the energy density, but are extremely stable.

Awesome to see Redflow recognized in the industry. Our solar company has collaborated with them on a few micro grid projects for commercial clients. Great group of professionals.

Great update on these batteries. I definitely would consider them as a possible home backup storage system (if they become available for the USA residential market). I will have to check into this possibility.

Australia, with its abundant sunshine, is ideal for such a battery placed in the back of every garage in every single family home, not to mention larger stores/shopping centers. My friends in the country talk of EVs selling out whenever available and proliferation of rooftop solar. I think it's only a matter of time (and, perhaps, govt policy).

Hang on a minute. The Redflow battery is not a typical flow battery in which the electrons are exchanged between atoms of the same metal in different oxidative states. It is a plating battery in which Zn is plated on to a substrate during charge and goes into solution during discharge. As for full discharge, they must be fully discharged periodically to avoid spicule build up. For this purpose it is useful to have two of these 10kWh batteries. Periodically one is fully discharged into the other.

Hey Matt! As a Filipino consumer who is acquainted with carbon-zinc, alkaline, and lithium-ion batteries, I was pleasantly surprised to hear that a zinc-bromide type battery has been existing for 137 years. However, it was not even mentioned in our high school science classes here in the Philippines. Anyway, thank you so much for the video presentation. I really hope such zinc-bromide battery technology will be gradually re-introduced in the global market.🇵🇭😉☺️🔋🔌

The round trip efficiency for the LiFePO4 (also known as LFP) lithium chemistry is around 95%, actually. This is where essentially all lithium-based vehicle and fixed storage systems are headed. You may have been quoting efficiencies that include the charge controller in the loop which would not have been an apples to apples comparison, or other lithium chemistries which don't represent where the technology is heading.

An excellent and well-explained video Matt! You find ways to explain complex technology to those of us without an EE degree. Thank you. Sounds promising for use downstream of renewables in both large scale and home/office backup.

Given that Li based batteries are still the preferred choice for EVs, any technology that replaces the need for Li batteries in stationary storage is a good idea. If I understood correctly it appears these companies are already in production, so this is a real, not an uncertain future technology.

Although I love the idea of making better use of Iron, it does sound as if Gelion and Redflow have their grid compatible products ready for retail. Especially here in Australia with so many households pumping their excess photovoltaic power to the grid each day, we're in need of grid sized battery capacity; and a tech that would have better than a ten year life with daily discharge sounds quite plausible.

Would be very interesting to hear how these ZnBr batts compare at single house scale e.g 10-20 kWh. There are still people installing Pb-Acid batts due to the immediate cost and (perceived?) fire risks of LiFePo, even though after 5 years they start regretting it. If the material costs really beat LiFePo, I can see a big market in that sector!

Hey Matt, I've been watching your videos for some time now and due to the many, many different energy technologies being explored, each trying to improve or solve a particular part of our complex energy needs, it's becoming very difficult to compare/contrast them. Have you considered moderating leaderboards? One for say Utility Scale storage at cost/kWh, another for energy production at LCOE? Maybe with projected environment impact costs thrown in? A leaderboard for small-scale storage like vehicles would be good too. And you regularly make content anyway when new companies come on the scene and existing companies make improvements...a perfect time to update the appropriate leaderboard. Finally, it might be a good way to give citizens a simple, understandable, and *impartial* view of the data when government leaders are making decisions and/or picking winners/losers.

Zink bromide sounds amazing, because you don't _need_ very high energy density (by weight or volume) for grid scale applications. What you need, is for them to be as robust as they can be: withstanding temperature variations, withstanding a lot of cycles, and being made from materials that are as risk free to the environment as possible, both in production as well as during operation and eventual decommission.

Thank you! I had been aware of Redflow’s residential flow batteries for a few years. I wasn’t keeping up with them since they weren’t offered in the USA at the time. It’s great news to hear they have finally made their way here! 😁👍🏽🏆

How do these compare to Edison style iron-nickel batteries? Long life on those.

You mentioned high temperatures but how do zinc-bromine batteries perform in freezing conditions?

I wrote on Robert Murray Smiths channel about putting gelatine in bromine to stop it sloshing around ages ago

Honestly, letting lithium have its niche as the small battery while letting something more affordable take up the big battery position with fewer downsides sounds like the best of both worlds. Less investment of lithium in these massive storage plants means more lithium to supply portable batteries, while the arguably more recycle-able Zinc/Bromide can take up the bulk of space and cut down on costs involving fire prevention systems, with those also being put to better use elsewhere. It sounds like there should be a catch somewhere.

Thanks Matt. Storage seems to be the one factor that most national grids lack, and it becomes very obvious during times of grid instability or power shortages for whatever reason. I think about batteries and inverters everyday, more so during power outages (every day for several hours a day currently). I would be interested to see what price the Zinc-Bromide Gelion batteries are sold for in SA where I live presently. They certainly seem to offer an improved all round solution that Li-Ion... but cost will be a major deciding influence on what I purchase. Thanks for sharing - interesting and thought-provoking as always 👍🙂

I have always been pro-Flow batteries for grid-scale. With Lithium and other precious metals being used for car batteries it does not make sense for mega packs to be wasted on grid-scale energy anymore. As long as these can be stacked up in shipping containers, then they can be very useful for being placed right in the middle of cities instead of wasting land out in the middle of nowhere.

So the cost of these innovative battery storages is $52 kW/h. Nuclear is ~$160 MW/h and solar/wind is 40MW/h. I can't see this equation working for intermittent renewables. Nuclear is so much more expensive, but when you factor storage, it is a drop in the bucket. This is accounting for all, including handling all nuclear waste. I cannot see the economical incentive to replace fossil with intermittent renewables, maybe we should be focusing on nuclear as a first step while we work on cheeper storage?

You have a lot of videos on batteries of the future and Im wondering if you have ever looked into Zinc-air batteries and how you think they stack up against other battery technologies of the future. Thanks

I'm very curious how these Zinc-Bromine chemistries stack up against Ambri's liquid metal batteries, especially when it comes to grid storage. They are very different kinds of technology, so it would be interesting to see them compared, and determine the pros and cons of each.

Hope these get down to personal storage solutions or at least something similar. Right now a high quality 48v 100ah LiFe rack battery used for personal solar storage costs around $1,500 which considering you'll need multiple of these for home/EV power storage makes this the most expensive piece of a solar project. Any cost reduction is very welcome.

This is awesome content and the way you give the details is very well done! You just got a new subscriber. This is some exciting stuff. I wonder if I could have a shed size one set up to store power for a decent backup. I wonder how long it could last for a household that reply on 30 to 50 kwh per day. Thanks for this content. Got my gears running

I appreciate the information regarding new batterie developements and the technical analysis of each type of tech.Thanks for your in-depth research.

Given Australia owns the largest zinc reserves worldwide - an estimated 69 million metric tons, and is surrounded by sea water; zinc-bromide batteries make a huge amount of sense for Australia. The abundance of natural resources for this technology could be a boon for its own energy security.

As always, the worst part of your videos is seeing so much cool stuff to be hyped about while knowing it's still not production ready and so we'll have to wait a bit to see it in action.

Something i have been thinking regarding storage of renewably produced electricity: Perhaps pumped storage hydroelectricity would be more advantageous in locations where constructing it isn't very disruptive? The principle behind it is basically ancient and reliability wise there's really not much that can fail, only some pipes, a pump a valve and a turbine are what's actually necessary

As Ever a great video, very informative . The thoroughness of costing the re-use and refurbishment of the different types is excellent and somewhat absent with regard to wind power vs tidal vs solar etc. etc. looking forward to more of your video's thanks .

Thanks for mentioning the various applications of these battery technologies because we have had the tendency of people comparing Lithium batteries to other batteries without putting use cases, which make the arguments biased. I’m looking forward to regulations categorizing battery applications to manage the availability of raw materials. For example, I’d like to see regulations come in on the use of lithium batteries for static energy storage, like power plants, household backup systems and the like. With the mobility transition, it looks like we need lithium more for vehicles and mobile devices and not in-one-place storage. Curious to hear what your opinion is on that. Thanks for your videos Matt. Much appreciated

Matt, I understand these zinc bromide batteries are not for cars and the industry is focusing on commercial applications but what about residential applications? Obviously the LiFePO4 battery is the fad for now but in these battery videos could you add content for residential comparison? Are these technologies accessible to homeowners?

If I was to have a backup and/or peak load/electricity cost fluctuation/UPS battery solution for my home, (I live above the arctic circle in Norway, and in a place where the weather can get really rough causing power outages several times through autumn, winter and spring). I'd use Zink Bromine. I have a lawn/area on my property behind my house, out of view, that lends it self for the purpose. I don't mind the density beeing low, when the rest seems to be good.

So far your Rust battery and Aluminum Air battery videos seem to present safe and most promising electric energy storage technologies. Also your video about nuclear waste batteries is interesting.

You forgot to mention that Lithium batteries for Grid Storage are competing for raw materials with the electric car industry! This will increase the inflationary pressure on them as the electric car industry scales up. It will probably be a LOT cheaper to use a different chemistry for Grid Storage applications like Zinc-Bromine than using precious Li-ion materials that are much more valuable to go into cars, delivery vans, buses and trucks!

One of the more interesting tangents this made me think of was the upcycling of older ICE related industries (car batteries) It made me wonder what other parts of the ICE engine production line could be converted. Like the people who used to make starter motors converting to making electric bike motors or similar... Not sure what a spark plug maker could be transformed into.

I have to say I really like the Gelion battery concept but I'm liking it more for home storage solutions. I say this because from what I've read about gravity battery systems. That's the way I think we should be investing more time looking into. But I also agree 100% with what you say. There is going to be, and has to be, a combination of solutions if we are going to do this right. Just like the tackling of the renewable energy situation. Oh, and love the video. I watch every time I see you come up.

How about the Edison Battery; the nickel-iron battery. They have low energy density, so the batteries are big, and a fairly high self-discharge rate, but in a fixed installation the fact they can handle unlimited total discharge, a wide range of temperatures, and a lifespan in excess of 50 years makes them appealing.

Well, I hope things change soon as I have been trying to get hold of a Redflow battery set for over two years now. The reps have told me a few times that they were not seeking a market in the US. I hope that has changed. I will be starting the build phase of my new shop/home in a couple years and hope to have the units available to install in my new home. Otherwise, I am going to install an Edison battery bank. I am going for a net zero/off-grid setup to retire in.

All positive storage options should be deployed as soon as they are ready. I hope Zinc bromine batteries get put to use sooner than later.

Redflow has a factory is in Thailand? I have never seen their product.... guess it's not for a home consumer. I also heard a rumor Chinese are going to open a sodium-based battery factory in Thailand too.

Thanks for another great video, Matt. I hope these batteries come soon to the residential market in the US. Sounds like a great fit for storage in a hot garage in Phoenix. For the nonflow model, how does the volumetric energy density compare to LFP? I have limited garage space.

I wonder if they'd be useful for normal car batteries. Simplistically sounds like a decent replacement for lead acid. I wonder about batter backups as well.

BYD and CATL will start making sodium batteries in production quantities next year. They seem as good as flow batteries. You may want to compare them with the flow batteries.

The zinc-bromide might be good for homes and “power walls”

Hi Matt, as always you are informative and entertaining in equal measure. I have been trawling back through your articles on battery technologies, however, I cannot find any reference to the different Lithium battery technologies such as NMC, LFP and LTO and their relative safety implications ! Any chance you might cover this in the near future ? Best Regards.

I LOVE 💕 these battery new technologies videos. As an electronic engineer, my dream since childhood is to create the eternal battery. This dream began when my toy's batteries were often dead. It should have some way to keep batteries to run almost forever, at least for many many years. And very compact. 💥💥💥

Greetings from Australia, Matt, I'm hoping we're getting one step closer, en masse, to the up-take of renewable energy storage. However, If you have the time, space, know-how, climate and commitment required to do all the right things: harvest your own rainwater, grow your own vegetables, raise chickens, rabbits and ducks for protein, buy other necessities in compostable packaging, make bio-gas and compost from your garden and kitchen waste, have a chemical toilet and have no requirement for the utilities and services that are available you still have to pay "availabililty charges" for water supply, garbage collection, etc so local governments can get paid to do nothing. We are already paying hundreds of dollars each year to our local council for multiple bins to separate our recyclables but most of it still goes to landfill. We pay an extra 20c for recycling of bottles and cans to receive a 10c refund yet most of that still goes to landfill. It's all administration, pretense, fraud and corruption on a grand scale by bureaucrats to manipulate the green vote and keep their jobs. As we get closer to energy self-sufficiency at home I expect our corrupt governments will bring in unfathomable laws enabling an "availability charge" for power to prop up the poles and wires that they have sold or want to sell ("privatise") to foreign investors for billions of dollars that we, the people, will never see. Redflow and others: This would greatly hinder the up-take of home storage of renewable energy and the ROI on your R&D investment. Environmentalists: Wake up and watch this space. Governments: Don't you even think about it!

Great video of information and you sir are a great spokesman for your channel, very coherent and direct with factual data. I just liked and subscribed... Also, people while Matt brings us this ingenious technology, it is time to look into investing into some of these companies. Blessings and great health to all.

I have a VERY efficient energy storage battery: Water! Use intermittent electricity from wind or solar to desalinate sea water, and store the water in tanks or reservoirs for later use. The "energy storage" is the grid power you don't have to use to run the desalination. This technique is perfect for storing that energy because such a "battery" has no storage inefficiency. To increase the storage capacity, just make a bigger reservoir. Or use the empty ones we have now.

I think these Flow batteries have a big future as a safe fixed storage solution and would love to see Australia carry out large scale installation and trial of both of these solutions. If this works out we have a solution for flow batteries in fixed storage releasing the Lithium batteries for vehicles. This should bring down the cost of the batteries as there is another option.

They should! Lots and lots of upsides! Yes one of the ones you mentioned looks like it has enough capacity and output for home use. 10kWh would be great! And $150 per kWh? Wow!

I used to work at a chlor-alkali plant which is oddly close to your description of a flow battery but in reverse. I always wondered if the reaction could be pushed the other way to produce electricity as the cell stacks alone drew 3 MW. I give you the sodium hypochlorite/Hydrogen acid battery!!! What could go wrong???? I had to put that out there...having seen what goes wrong. Have to watch those halogens....they're like colorful dragons.

You need an episode or a series of episodes to compare where some of these technologies are at. typical science sites explain individual technologies but rarely compare how close to reality they are. You see a technology and then never hear of it again. Did they get stuck on a particular problem or did some other solution seem more promising.

I would feel much more comfortable with a Zink Bromine over Lithium Ion as a home backup solution. It's worth some extra space to get the bulletproof safety. Especially if it's installed inside the house.

It's nice that you make some temperature comparisons for the use case in Australia but will it also work in subzero environments like Norway or Canada??

Great video. I will look into these companies you mentioned. Thanks, Matt. Merry Christmas.

I’m a big fan of zinc-bromine batteries. Cheap, safe, no critical minerals, simple manufacturing. What’s not to like? Full disclosure: I’m invested in Eos Energy Enterprises (EOSE), a US-based company developing Zn-Br batteries for stationary storage.

What's their cold tolerance look like? With the one battery being built in existing lead acid packaging, do they work as replacements for standard car batteries? Good for marine uses?

The Gelion batteries are poised to hopefully replace lead-acid applications, with a very real possibility of being a 1:1 replacement and not needing any advanced circuitry like Lithium does. I have also read that the RedFlow batteries can have the liquids recycled and essentially cleaned for re-use. They can also sit near indefinitely at any state of charge without the usual degrading. I was very keen to get one in a home solar setup, but RedFlow is pursuing the large scale market more than home (at least here in Australia). But still very exciting technologies!

It's another way of storing energy. Ultimately, there will be several options used, each chosen as being the best for the particular application. One newish idea is to store sand in an insulated container and use it as a heat sink to store surplus energy. The sand can be heated to several hundred degrees Celsius and the heat used directly or converted to electrical energy. Perhaps using a Stirling engine generator setup. This system is almost infinitely scalable, it uses cheap and locally available materials that don't degrade with use..

Hi Matt on these potential candidates for long term / seasonal storage for the grid or even offgrid homes, could you please specify beyond their round trip efficiency what level of phantom Drain do they expérience. For long term / seasonal people would look for few % per month versus 1% to 2% loss per 24h day in my Tesla battery that defacto can't be used for seasonal storage due to this juge phantom Drain.....

Please do a video on the recent development on net-positive nuclear fusion! Your ability to simply explain complex topics would be very welcome on this momentous milestone. Thank you, Matt!

It still amazes me the amount of distinct elements we have to play with on Earth with endless chemical compounds and materials, all while the immense majority of matter in the universe is hydrogen.

thanks Matt for the very interesting and informative post. I've been following ZnBr2 flow and gel batteries in Aus with a view to buying a home storage for my solar system. I've even read up on H2 home storage (LAVO) but despite its advantages, the round trip efficiency is around 50% and it's quite an investment. Do you know anything about availability/predicted release of Gelion's Endure battery in the Australian market? Their website doesn't mention this.

I live off grid in Canada and I am interested in this product. I also enjoy your program. Thanks 🙏. Happy holidays!

You mentioned they would not be suitable for mobile use. Would that be true for sailboats where weight and space would be a concern but maybe not quite so much? One of the big concerns with lithium on sailboats is fire.

Curious. If they have the same format as lead acid batteries and so many more cycles, why hasn’t the automotive battery industry converted or already looking at this as a replacement for all the existing ICE and lead acid applications? If cheaper and more effective, it would seem to be one hell of a use case and existing market to upgrade.

Also, the flow battery style can be scaled to provide more kWhr over an extended period just by using larger tanks with more electrolyte. ie that Intermediate term storage like overnight

The Gelion battery interests me for off-grid and RV house battery applications.

Matt, do you know of any home battery systems that use zinc-bromide gel cells? In particular, here in the US?

In the video, almost right after each other, both $153 and $8 per kWh figures for Zn-Br RFBs are stated. Did the price per kWh really drop that much in just one year?

There are a lot of numbers related to kW, kWh and like you said different uses to make comparison hard. So maybe convert all the numbers to one bigger "typical" real life situation. Like the storage you want for a typical x MW solar or wind farm, supplying y homes of power. How much space and running cost would ZnBr have compared to Li ion and other solutions? Or at what lithium price would it be better? The 16mln $ refitted factory, in how much time could it produce one such project? How long would it run without problems and what would the cost per year be to replace a % of the units yearly? Could these units be recycled?

The Gelion batteries look like a great opportunity for replacing lead acid batteries in stationary off-grid solar applications. Particularly if they have more energy density than lead acid, but are not as costly as lithium-ion.

Soon, any type of battery will be viable. World is slowly waking up, I can see it in housing market - solar becomes quite frequent. Battery makes, sometimes, more sense than solar thanks to high/low tarrifs (faster ROI), and cheap (although a bit bulky) battery would be a no-brainer for any home owner. Find a large place under the stairs, fill it up with batteries and there you go...

Hey Matt, great video! I've used your channel a lot for research into sustainable home energy models. Do you think a neighborhood power-grid using a combination of solar and wind is feasible with battery technology today? My goal is to build affordable neighborhoods that also act as local power suppliers to the grid, but have been stuck on how to store the power in a safe and cost-effective manner.

I wish Matt would make a much bigger deal about tech that is already being used in the marketplace. So much of the stuff he covers is barely more than a PR press release

When you make comparisons to lithium ion batteries, can you also provide the specs for Li batteries please? I think very few people have those stats memorized, so it's hard to compare new tech vs old tech without providing numbers for both. Thank you. Love your videos.

I always though the redflow battries are great. The liquids are natural fire retardants. Only mechanical failures of the pumps and values is what concerns me . But we have pressure pumps running at home for years reliably

Love your videos Matt! Keep it up ;)

Niche companies have always had a hard time braking in. If the stats that you show hold up they may have a shot I think. We saw haw the battery did in the heat but haw dos it do in the cold. That will be a big deciding factor. One of the reasons that lead acid has been the contender for so long is the wide range of temp that it can work in.

I just replaced my 12 Trojan T-105 Flooded Lead Acid (also 'old skool' tech) for my home system. I got 9 years out of the last 12 (without proper maintenance)...I'm looking to grow my storage capabilities beyond our current capacity as we add a geothermal heat pump to our house...where can I (and CAN I) purchase these Gelion Endure batteries?

Great episode. It's encouraging to see many such developments. When scaled up, if key factors such as cost, benefit, safety and environmental impact square then they will find their use in the real world. Horses for courses, for sure.

You want to talk about Zinc Bromide but I want to talk about Sodium Bromide, but everyone like "NaBro!"

I love your channel and your positive outlook. Thankyou