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You don't need an attack. Covid showed us that. If covid was more deadly, then society collapse would have been a possibility, and grid fails for lack of operators, maintenance, and fuel deliveries.

It's called the EG4 Powerpro and weighs 300 pounds. How many 300# items do you see sold to DIY'rs? A 12v 280ah is doable, and some are sold in the 400ah range. But at that size, the DIY is starting to think about a 48v system.

Build a small room inside the barn to cool/heat stuff you really need temp controlled.

I was thinking about how much you would take out of a Sol-ark if it was off grid only. To maintain all functionality, you could remove the isolation relay to take it off grid. You would then make the grid input a dedicated generator input. Gen input would then be available for ac solar or smart...

Larger generators go on the grid input.

Maybe FTC should standardize inverter advertising to: Max Usable PV / Max AC Inversion from battery. EG4 18/15kW, Sol-ark 15/12kW.

FTC has no jurisdiction on a Chinese company if they don't sell in the USA. Also, nothing prevents a company from contracting with someone to produce X with the requirement that they don't sell X to anyone else. I don't see Apple's manufacturers selling compatible iPhones.

I'm guessing most inverters are installed indoors.

Best to run a generator at 50-75% of load for efficiency and wear and tear. Size for . 5c charge rate plus load. I assume this is for backup when grid is down. If you need more regular use, then you need to look more into the specifics of the generator. Diesel generators are bad at low loads, so...

Get a sol-ark or 18kpv. It will passthrough whatever you need from the grid to supplement pv/battery. When you are happy, you can disconnect from the grid.

A generator is naturally A/C (spinning coil). Additional circuits required to convert to DC. If you have a hybrid car, it can deliver about 3.6kW of high voltage that you can step down to recharge batteries. Hybrid cars make the best DC generators. Easy to refill the gas. Don't have to worry...

4/0 wire carries current for all inverters. 2/0 for one inverter.

One problem I can think of too much battery is if they become severely discharged, and you don't have the capacity to recharge them. Sitting a long time in a low charge state is as bad as sitting a long time in a fully charged state.

Use the gen port as a smart load. Put the charger on the smart load. Turn off smart load when grid is down.

Ikea store

Sol-ark doesn't need CT to detect grid down and disconnect.

A lot of "dirty" plants are having their life extended for grid stability.

Low end DC fast chargers are 480v at 100 amps, or 48kW. In comparison, a house is 240v, 200 amps. Strings of solar are in the same voltage range, just lower amps. Note: some fast chargers are up to 1,000 volts. For home use, 480v would work. If you have 500v strings of solar, you could direct...

One 20 amp 120v circuit is 2.4kW. Let's say you run it at 15 amps continuous, that is 1.8kW, or 43kWh per day. Put the RV near the Barn/shop, and run a 20 amp line from the Barn to the RV. Build a basic system. Solar/Battery system. Power a Chargeverter to recharge a 48v battery when there is...

Looks like what happened when I DIY a battery build.

HPHW much more efficient than tankless. Also easier to use on a solar setup.

PM me if anyone in the New England area would like to split a B1G1.

After the Federal and State Rebates in my area, the net cost is not that much more than a regular electric heater. Even if the Heat Pump breaks, what is left is a conventional resistance water heater.

I don't like the false floor. Too much dirt that drops onto the batteries. I don't like uninsulated wires. The risk of an accidental short is worse than the insulation being fuel for a fire. Good luck pulling one cell out. They should be packed tight, and under compression. A lot of work...

Charge from grid. It is the cost of getting your batteries to work properly.

As long as you know the risks of buying Grade B cells, I think it is ok. 18650BatteryStore seems to have a good reputation (customer service via phone, and not e-mail). Being in the USA, truth in advertising will eventually come back to bite them if they don't do something material that they say...

DIY from 18650batterystore.com

Can I sell my CV for a profit? Barely used.

If you don’t have room for a heatpump water heater, you don't have room for the inverters and batteries.

Carrington event of 1859 are estimated to happen every 500 years, on average. It is not unusual for 100 year events (in other contexts) to happen in back to back years. Large CME's are frequent, but pointing at Earth is rare. Could be unlucky with one pointing at us soon. Or, it could be another...