LeftieBiker wrote: ↑
Wed Sep 04, 2019 4:03 pm
I had a similar issue with the chassis ground with my inverter. In my case I'm going to disconnect it because the inverter is grounded through the house wiring when plugged in, and having two separate grounds was tripping the inverter's GFCI outlet. You, however, need to ground the inverter. You can use a grounding rod, or a ground wire connected to the house ground circuit or to metal plumbing nearby. Don't try to use the Leaf, as it's isolated from ground.
Actually, I'm now thinking I'll try to back-feed some house wiring; if the GCFI outlet's ground is tied to that ground lug next to the battery connections, sounds like I can just leave the latter disconnected.
Plan for back-feeding house is just to plug a double-male cord from the inverter to a single-pole (120vac) house circuit (as I described a few posts back). Obviously need to be careful; I'm imagining a checklist that goes something like this:
1. Switch off the main breakers (in the load center).
2. Switch off all branch-circuit breakers in the load center, except for the critical loads. I guess theoretically the ones on the other "side" could be left on, but why create confusion and risk).
3. Connect a double-male 14awg (or better) cord between the inverter and an unused outlet on one of the critical circuits.
4. Making sure inverter is switched off, plug the inverter 12vdc cord into the wifty rig described in the OP.
5. Put Leaf into "READY" mode.
6. Switch on inverter.
Critical loads could include fridge*, living room lights and ceiling fan, modem, outlets for phone and laptop charger. Oughta last over two days with 40kwh battery. Fridge is pretty modern and I measured 100+ watts running, but difficult to measure compressor startup surge, and I'm not sure how much the un-defeatable auto-defrost uses. Darn range won't let propane flow without electricity; it's got a neutral, so probably has 120vac components and the gas shutoff is probably one of them, so I could leave the double-pole breaker on and hope the energized hot supplies the 120vac components (or switch the hots if it doesn't); sounds good in theory, a bit spooky in practice ...