Connecting an inverter for emergency power

[scrambler]

Forget all that

I had looked at this too quickly and got the impression the screws available on the battery connectors were tiny, but they should actually be big enough for the Cables I plan to use.
http://www.roughcountry.com/quick-disconnect-winch-power-cable-rs107.html

And 100Amp breaker for the plus line.
https://www.amazon.com/gp/product/B00139FQSS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1


Sorry for the wasted time

 

[NORTON]

Looks like a great plan!
CB instead of a fuse!
And nice covers for the Anderson connectors! Never saw those before!

 

[MrDRMorgan]

Forget all that

I had looked at this too quickly and got the impression the screws available on the battery connectors were tiny, but they should actually be big enough for the Cables I plan to use.
http://www.roughcountry.com/quick-disconnect-winch-power-cable-rs107.html

And 100Amp breaker for the plus line.
https://www.amazon.com/gp/product/B00139FQSS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1


Sorry for the wasted time

I understand what you are trying to do and it probably will work. If it was me, I would be afraid of frying the 12 volt battery in the Spark EV, which is only rated at 50 amp-hours and / or the DC to DC converter in the car.

I keep two Honda 1000 watt pure sine-wave generators ready to go at all times and I have actually used them to keep the lights and furnace on during power outtages. My pickup truck, which now is seldom used, has a full tank of fresh gasoline should I need it for the generators.

I have also experimented with a 300 watt pure sine-wave inverter driven by a deep-cycle 12-volt marine battery which was charged by a 60 watt solar panel controlled by a Morning Star solar charge controller. This configuration worked great but only until the battery fell below 11.5 volts.

I haven't tried to charge my Spark EV by using the two pure sine-wave generators through a L1 EVSE, but it should work. The two generators can be paralleled to supply 1800 continuous watts for a number of hours. I think I just need to connect the generators to earth ground to make it work.

Having said all that, I am still really interested in how your idea works.

 

[scrambler]

The principle has been used a lot, apparently without any issues on the Volt Gen 1 and Gen 2.

I think I read that the DC DC converter (APM) that recharges the battery can supply 175Amp at 13.5-14.5 volts.
I also remember reading that the Volt Gen1 could support providing 1500W, but the Gen 2 was a little under at 1200W, and that the Spark APM is supposed to be the same as the Gen1 Volt.

There are several interesting threads about this on the GM-Volt forum