Icarus wrote: ↑
Sat Aug 01, 2020 10:10 pm
Thanks. I've looked a bit closer at the schematic on the previous page.
System Main Relay 1 and System Main Relay 2 seem to be accessible via the connection points on Pins 14 and 17 of the battery interface. Would it be feasible to parallel an appropriate voltage onto those pins to activate the relays? Thus bypassing the handshake protocols?
Please keep in mind the 'use case' for the CHAdeMO port is discharge only. The solar inverter load would be self-regulating to a maximum of 5.2kW discharge. I don't need or intend to use the CHAdeMO port for charging.
I anticipate I would modify the CHAdeMO port to be a simple physical interface only for connection to the Leaf. ie. I've watched a video where the main DC cables are spliced into a 'Y's at the battery connection point and bypass the DC\DC Junction Box.
I had similar thoughts of tapping into the heater circuit when I purchased my leaf with a scheme of charging via the on board charger and discharging (in emergency) via the approx 10 kW heater circuit that is protected by it's own fuse. Physically, it seemed quite simple and living in south TX, I could modify/remove the heater as I never use it anyway. I've done something conceptually similar with my "PriUPS" system using the "big" high voltage UPSs. Issues included the energy draw leaving the Leaf in standby mode - and - I liked the Leaf so much, I decided not to take the chance of "bricking" it. Waiting on a commercial V2G/V2H unit
2012 Leaf SL; 46,000 miles. Battery replaced November 1st, 2016.