Charging house batteries

[Forester17]

2017 forest river forester 3051.

Parked in front of my house and the house batteries are low. What's the best way to charge them? Nothing is on in the rv. It's just sitting there.

Turn on the vehicle engine and let it run?
Turn on the rv generator and let it run?
Some type of trickle charger?
Extension cord from the house to the rv with a converter plug into the back.

Also, the Bigfoot auto leveling jacks are down and won't work until the battery is at 100%. Then, apparently I have to unplug the interface cable.

What is the interface cable?

[SeaDog]

Myself I would take the opportunity to run the Generator for an hour or so to charge the batteries, run something like a fan at the same time to put load on generator.

[ScottBrownstein]

1) Run an extension cord to the house, use a 30 to 15 amp adapter and plug into the house. Turn everything else in the RV off with the exception of the converter. No microwave, water heater electric off, reefer off, no A/C.

2) If your converter plugs in you can just plug it into the extension cord rather than the RV cord and adapter.

If your batteries are really dead it will take days to charge up to 100%.

I doubt that the Bigfoot needs 100% SOC, but won't work below some voltage.

[Kenny kustom]

Plug it in.
Or put a couple solar panels on to keep the house batts up.

[Forester17]

I dropped it down to 15amp and plugged it into the house. Its been charging about 24 hours now, which should help.