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Possibly impractical, but if you could merge the 3 separate battery banks into one, that one battery bank could feed all three inverters. See also Incrementally adding DC batteries for some things to think about if you think you might want to do that. You might post that as a new question to...

Ran across this DOE paper comparing different types of energy storage: • lithium-ion (Li-ion) batteries • lead-acid batteries • redox flow batteries • sodium-sulfur batteries • sodium metal halide batteries • zinc-hybrid cathode batteries • pumped storage hydropower (PSH) • flywheels •...

Price is the main reason IMHO, those things are very pricey $/kWh. I agree if you're planning to store the energy for weeks self discharge is problematic. But, in a situation where you're fully using the battery over fairly short time frames (e.g., overnight off-grid, regenerative braking)...

Community (Condo) Solar Another way to make solar more affordable is to share the costs and benefits with your neighbors. A community solar program involves building a small solar “garden” that multiple households get power from. The community might collectively own this garden, or a third party...

Lightning and water are the two components of the impressive Hydra skyscraper that uses electrolysis to form hydrogen and store power for future use. Inspired by a mostly sedentary, simple aquatic organism, the skyscraper is designed to harvest electricity from lightning storms that is used to...

Michael Mann Wins $1 Million Verdict In Defamation Trial Hidden Costs: Abandoned wells leaking GHGs Bait & Switch?

The report is here, thank god the oil companies have a solution to bail us out of this (#811 ; -)

Split the PCM vests out into into it's own thread as it's more about doing stuff outside then getting a cool sleep. Gel packs in the bed? But, if you put the gel packs on the mattress but under a blanket (or under the waterbed mattress) so you don't freeze... how long would they last? Let's...

Just saw those on AltE for ~$0.54/wh, a bargain as the older ones are still .79/wh.

When the IR is different they charge at different rates, that can cause pre-mature ageing.

Welcome to the forums! I'd like to invite you to talk about your system on the appropriate forum (e.g., Marine, Show 'n Tell or Residential Solar). How big is it, How's it going, what you liked/disliked, thoughts on it, what sort of problems you hit and how you overcame them, photos! And...

In #13 the algorithm was to send a chirp, then get the time delta to when it was received. That required some pretty tight timing constraints. Here's a way it might be done at a lower CPU speed. Suppose instead the transmitter transmits a signal at 40 kHz. The receiver will receive at the...

Welcome to the forums! Moving to Paraguay sounds like quite the adventure! Please keep us posted on your build and best of luck!

Batteries have "burst disks" to prevent bursting in the rare scenario where pressure builds up inside. Ideally, the vent should be oriented to the top so all the electrolyte doesn't flow out and make a hazardous mess. Will might have a teardown video on the EG4 from which you could see the...

Hard to be precise with the unknowns, and insolation is like parley...

But can you brag about hot it is where you live? (see the OP if you don't get what that means).

See post #1,400 for the first post on this. Manchin gave an interview, he says the reason why the pipeline is needed is that the only way to reduce energy prices for Virginians is to increase supply. Except Virginians are paying less for electricity ($0.0914/kWh) than I am. What an enormous...

I notice Will's thermometer only goes to 120 and was wondering if anyone had a better recommendation for his shed.

You can find ready to go transmitters like the Yard-1 for $100 that work in the 300-348MHz, 391-464MHz, and 782-928MHz frequencies, ideal for most RF operations. But honestly, how hard can it be? This isn’t AM/FM. This is On-off keying (OOK). Could you use an Arduino to turn on/off power to...

This is the converse of the idea in the update above... Not sure if they make them, but a low-voltage cut-off switch that you could program the "low-voltage" to be, say, 95% of your battery bank could be wired to the hot water tank. So, as long as the battery was over 95% if would power the...

All great topics! Can I talk you into writing any of them?

ref From a C2, but it lasted a long time. Probably nothing to worry about.

A lot of folks have done that. They're a Tier I provider with a tier I pricetag. I'm definitely value-oriented (which sounds better than being called a cheapskate), but I also try to factor in things like warranty, tech support, simplicity and things not found in the competition (e.g., the 40...

Hate to step in... but folks won't defend themselves because it can escalate and get even more off-topic (sorry Russ) and yet if you don't address it the problem persists. Moderators are people too, just because someone volunteers to keep the forums civil doesn't mean they should be excluded...

That's our bad, sorry about that. The action was taken for the reasons you cited, probably the mod that did it thought it was self-apparent. Much appreciated!

Cost of not acting on climate change: $44 trillion TicToK Algorithm Mislead the public Fox drops Tucker Carlson, but fake news lives on Climate Misinformation: Communicating Climate Science in an Era of Misinformation Renewable energy is delivering in Texas

Before digging into the aluminum case after the battery pack... take a look at the charger. Does it just output constant voltage/current like a regular AC adapter (e.g., wall wart)? if so, all the "brains" might be inside with your battery and you just need the booster to duplicate what the...

Ford's E-Transit does 125 miles on a charge, or 186 miles with the bigger battery. After that it's 17 mpg. The new battery tech promises to be faster charging. Rivian has an electric Van, it's the one Amazon is using. 150 mile range, not sure if it has gas too.

I don't think they're so much "up in arms" as trying to give the best advice for a condo. I think natural gas, if available, is the best case as it provides unlimited runtime. Gasoline is fine if you have a place to store it out of sight where the fumes won't bother anyone (e.g., garage, balcony...