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I have been wondering about this. When we build something the local inspectors get to apply all these expensive to comply with rules. Yet Alibaba or Amazon will happy sell us some janky non UL listed product we can plug right into the wall and hope we don't burn anything down. So..I have an...

Yeah they do. Sigh. Naturally it's like their #1 cause of failure. Not their main battery but their little dinky 12v. Couple reasons : EVs tend to be loaded with 'smart' features that suck battery like remote connectivity and sentry mode - and since these batteries aren't used for starting...

Yeah I was just reading about frequent lead acid battery failures in the one I ordered. So was thinking if I could prevent the problem that would be cool. Guess I will just have to tote around a boost pack

14.5-15.5 volts ish (from a Prius). The EV doesn't actually arrive until tomorrow.

Kinda what I am thinking as well. My new car will start itself recharging at 12.6 volts - right around 15% capacity for an Lifepo4 4 in series battery. And similarly on the top end of the scale, the BMS will just shut itself off. The lead acid 12v charging circuitry won't be optimal for...

What does this do to the efficiency? In penciling in the numbers I noticed that actually the cost of the pergola, or some other mounting solution, is a substantial cost compared to the panels themselves.

Which supplier?

It's for an ev. Minimal starting current.

I know this is a bad idea as the charging circuits are meant for lead acid. But assuming you use a brand with low temp charging protection, will it work? A chart shows at 14.6 volts the battery would be full. Automobile alternators and DC DC converters use 15 plus volts to charge their...

Note that if you put in slightly more effort the inspection will pass. Home inspectors don't go to the city permit office and pull the records.

Ok the first part: I'm telling you in some areas like where I live, those officials are nowhere to be found. I look to the house to my left. "huh that guy seems to have slapped on a crappy extra building". I look right " wonder if he got a permit for that, don't see how". So when do they get...

What I have noticed is that a residential solar install has all these unnecessary people with their hands out. The solar install company, the local county code, the power company, and the local guild of electricians at a minimum. And yet signature solar will sell us bifacial panels for dirt...

To add a new question to the thread : does anyone know approximately how fast LFP experiences calendar aging or have data on it? 4000-7000 80 percent cycles is obviously a 15-25 year lifespan on solar loads. But that's assuming no calendar aging, how much will that cut it down.

Ok so it's doing the same thing for you you could get direct from the battery if you are using the type with a BMS interface. I was thinking in terms of the charge controllers doing a high voltage disconnect due to the voltage rise caused by the *other* charger.

This would work, do these AIO systems generally have external shunt support? For the bus bar/racks that Signature Solar cells yeah you could hook all your battery supply cables to the lower part of the bus bar, and the inverter draw cables to the upper part.

Thank you. My only concern was that each inverter may believe the bank's state of charge is different than reality because each doesn't know of the charging/discharging done by the other. Probably this is one of the reasons for the RS485 communication with the batteries that's more or less...

So I noticed many people complaining of bugs in parallel mode, and I noticed it requires a rat's nest of wires and setup. (for both the MPP and growatts brands) So I thought : why not use a large 12k watt split-phase ffor the 'main' house inverter, and put the EV charger on a separate 1...

There has to be an inlet port to do that and the right interlocks on the breaker panel. You can use a small generator instead.

Turns out to be incredibly easy in practice. The EPA believes 15% of all the diesel pickups have been successfully tampered with. https://int.nyt.com/data/documenttools/epa-on-tampered-diesel-pickups-11-20/6d70536b06182ad2/full.pdf How are they doing it? Most likely by simply analyzing the...

Presumably you meant 1000 gallons, or a total of about 1600 gallons usable. Or $3200 - $6400 of just propane. Hope that it lasted longer than a year, though why did you need 2 tanks?

A laudable goal. Just don't miss the forest for the trees. You can't get out of paying to keep your car running, food, rent to the government (property tax), tribute to the healthcare system so they keep you alive longer, internet, and paying for replacements to stuff that breaks especially...

Sure but people are suggesting things like geothermal. You can't diy install one unless you own heavy equipment and they are $20,000 to install. 3 mini splits from signature solar are 1200 each and a few hundred bucks in materials to install. Yeah they probably fail sooner but when that...

This is an understandable goal but this is not how you should work out the math. You should assume the inverter will die every 10-15 years (lower number for a cheaper brand) and that the solar panels will need replacement at 25 years. Yes some equipment will last longer but a lot of equipment...

Yeah the simplest and laziest way to set it up: If the grid power is of reasonable cost, just do 2-3 mini splits you install yourself on exterior walls. (speaking from experience use exterior walls only and mount the outside unit on a wall bracket on the thick rubber mounts). You can do each...

A lot of bad information in this thread. Most suggestions are cool but not a good use of dollars. Correct information : don't bother with anything else but high SEER 9000 btu single head mini splits. The 38 SEER rebranded Gree models on signature_solar are the cheapest but if you don't trust...

It's not your mind. I can bring up the news article or you can Google but I read it's 73 cents a watt in advertising. That explains several thousand of the money. Small companies also have high overhead vs their cash flow so that can be a few k. The fix for this are basically more "plug and...

1. Reasonable. Banning the incandescent bulb was done after the LED replacements were $1-2 each. 2. Also semi reasonable. You would need a global agreement with enforcement. Basically where the 3 main powers : USA, EU, China agree to apply onerous tariffs on any violators of the agreed on...

We going to add another buck or 2 to cover marginal climate damage from the 28 billion gallons? Still, even as it is today EVs are close in cost So to summarize: we have to make pollution free (subsidize pollution) because we cannot use some fair and objective process to estimate it's cost...

For pickup trucks this makes sense. They need the range extender for towing and moving heavy loads long distances. The obvious location to put the engine is behind the cab, so that the genset is at the center is mass of the vehicle. Ideally there would be a high voltage plug in the truck bed...

It is a well established fact that burning fossil fuels causes pollution both local and worldwide. Failing to tax a negative externality is a subsidy. This is financially true not political. You can argue that the dollar amount of it is small and if you had evidence to support your claim it...

Should the government continue to subsidize gasoline? There are 2 main subsidies : direct assistance to petroleum companies, and free pollution. Currently fuel has no fee on it for the pollution it causes both locally and as recent weather shows, globally. Were those fees assessed and added...

A model Y long range, per a better route planner, will need 33 minutes charging for that run. Vs over 7 hours driving. Realistically if you needed to stop for gas once (10 minutes) and to pee once (10 minutes) you lost about 13 minutes in a Tesla. Which you save in 1-2 weeks of not having...

You just moved goalpost. Your requirement is 80 percent of 400 miles in 20 minutes. That means you need 320 miles in 20 minutes or 16 miles per minute. Ioniq 5 is 11.6 miles per minute so we are 72.9 percent of the way there. The very next generation of EVs with very large batteries...

Why not just flip the battery breakers to off when depart the cabin? As others mention the issue is charging and discharging at low temps. Just make sure they are at least 50 percent state of charge before you leave since they self discharge a little bit and flip the breakers off on however...

Maybe not your future but your requirements are similar to saying "until the voice quality and reliability of cell phones is the same as land lines I won't get one". If you actually believed that you would still be waiting as cell phones may never be that good. You are ignoring all the...