[Nebster]

The inverter-charger shown above can charge at 200A, or theoretically about 10kW. In practice, on a residential 50A circuit there is not enough headroom at NEC-derated 80% continuous to reach that level. I have not checked to see if the genset is safely wired for >50A, although I imagine it is since the overcurrent breaker is sized at 80A.

Anyway, charging LFP at higher rates is not as good for the chemistry, so we will settle for about 150A @ 52V, or ~0.25C. We will try never to let the pack get below 20% SOC, so a full topoff should take around three hours of generator runtime.

Historically we have spent a lot of time camping in places where we have access to a 120V shore source. Campsites with 30A, driveways of friends with 20A or even 15A, etc. So, I have added a secondary, smaller 120V Victron IC for charging off these smaller sources.

The smaller Victron is mounted one bay forward, at the interior of the curbside bay, where we had an extra twelve inches back there that our slideout tray doesn't use. (Our house vacuum and solar charge controller are back there, too. More on that in a bit.)

The small inverter can charge at 35A, or ~1800W, or ~43kWh per day. As long as our average demand per day stays below that, then we can run indefinitely off a 20A circuit without needing to resort to a generator.



Here's a view of both sides from the mobile app. Right now we are plugged into 240V at the house, I have the charger software-limited to 15A@240V for some testing, and the 120V inverter is idling.

In an emergency, were we to lose the 240V inverter for some reason, we could drive up to 3kW of loads off the small inverter. So there is a small redundancy benefit that comes along with the hassle of a second, smaller system.