capnTelescope wrote:(slightly off topic)
You piqued my curiosity, and I had to go refresh my memory (you aren't the only one) on the PD series. With the Total Charge Management System, does the PD only charge from A/C or will it charge if hooked to the TV's 12V power? I'd let the PD do the charging. You wouldn't draw 56A for long, just at first. Charging at a constant 40 amps (480 watts) would tend to boil the battery before long. An 800 watt inverter should take care of you.
It works on AC only. Here's a link to the charge profile. I have an older model where the charge wizard was an external dongle. The newer series have the charge wizard built in.
PD Charge Wizard
My solar panel controller has a more aggressive profile as it will charge the batteries to 100% in a day. The PD charge takes a couple of days to bring a battery gently back to 100%. A 90% charge is fast, the last 10% takes forever.