coulomb wrote: That's a 50 Hz transformer. You don't see many of those any more. [ Edit: in consumer goods. ] Transformers only work on fixed AC voltages, in this case 230 V and 19.6 V.
Without a lot of work, the best you could do was a transformer with 2 120 V primary windings, and a double pole double throw switch of some sort that arranges rhe windings in series for 240 V operation, or parallel (with care for the correct phase) for 120 V operation. Sadly, it's all too easy to accidentally use the wrong switch position.
Keeping the LEAF supplied EVSE "as is" is important to me as it is my primary charging option.
To be able to use solar(/storage) I will go ahead and design an EVSE based around the OpenEVSE kit. I will build a PIC based controller to follow the solar output starting at the J1772 minimum of 6A at 120V which is an excess solar requirement of 720W. If the solar output is handling that well, I will up the draw one amp at a time and follow the "excess" solar and I will be able to leave the LEAF "on the charger", unattended, for days at a time. I will be using a 120V 3000W PSW inverter so I will limit the maximum draw to 2400W (absolutely necessary on these 35+°C days).
It is hard to make predictions, especially about the future. Yogi Berra