davewill wrote:If I were trying this, I'd use an OpenEVSE and write custom software to monitor the Solar inverter and adjust the output of the EVSE accordingly. I'd use a battery just to provide the seed voltage to keep the Solar inverter online and to absorb/provide current while the car changes it's current draw. Just shut the whole thing down when Solar output is too low rather than add lots of batteries or draw the lead acid battery down.
I've actually done similar to this and it works with my OpenEVSE using arduino/IDE for control. IMHO, considering all losses, my 4000 nominal watt system is marginal as much of the solar day it wants to operate at the 6 amp minimum with a 220 vac inverter (clouds, early/late daytime). The system is basically off-grid with a small battery bank to allow for the solar fluctuations (with intent to keep battery SOC in reasonable range).
2012 Leaf SL; 43,000 miles. Battery replaced November 1st, 2016.