JBee
Well-known member
- First Name
- JB
- Joined
- Nov 22, 2019
- Threads
- 18
- Messages
- 4,773
- Reaction score
- 6,148
- Location
- Australia
- Vehicles
- Cybertruck
- Occupation
- . Professional Hobbyist
Why so many batteries?Even half charge in the right area is going to require at least 20kw in solar panels, as well as at least 75kwh in batteries to pre-store the power while you are at work. Most likely you will need 25+kw and 110-120kwh of storage to power your house and a daily 250 miles on a Cybertruck. But hey if you have the money and are willing to spend it more power to ya.
If I were to charge from offgrid solar I would want to do it straight from the panels via a inverter at a high enough rate to finish the cycle in daylight hours, with as little extra battery storage as possible. And then use the EV battery for overnight power use via V2H.
Solar is super cheap at $0.30c, batteryless offgrid inverter $0.15c plus framing etc. So you install a larger than the EV charger capacity solar system, and charge directly from the sun without batteries when it shines by modulating the EV rate to match solar availability. No batteries included or required if you charge in the day, and you size the array to suit your maximum daily commute.
For a 19kW charger you can install the same capacity in inverters, but run them with up to 40kW of solar panel input for max return, as MPPT will handle throttling, just don't go over max inverter solar input amps. That would cost $12k in panels and about $3k in inverters plus framing.
Then install it somewhere you can charge others to use it...
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