Michael Ross via EV wrote:
Micro-inverters. Yes, grid tie is best. And most economical and completely normal. That is true for residential solar generally, most homes will benefit from grid tie. So no problem.
*If* you have the grid, then grid-tie inverters make sense. No batteries needed. :-)
But if you are off-grid, there are also lots of free-standing DC-to-AC inverters. For decades, this was the only kind of inverters we had! I have a solid-state 12vdc-to-120vac 60Hz inverter built in the 1960's! It still works, too.
Jim Erdman via EV <[email protected]> wrote:
There is currently no simple way to do what you are thinking of.
Well, if "simple" is what you want, the simplest way is a rotary converter (motor-generator). Use your solar power to run a DC motor. Use the motor to drive an AC alternator. The alternator can produce essentially perfect 60Hz sinewave power; good enough so nothing you plug in (including your electric car charger) can tell the difference.
A rotary converter is a merged motor-generator specifically built to do this. They have been used for this purpose for close to 100 years. Small ones are only 60-80% efficinet; but once you get above 1 KW or so, their efficiency is pretty good (over 90%).
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