I'll be in an rv park for few weeks maybe longer depends on work. When I first had the system installed I was in and out of rv parks for a couple months and never worried about leaving the the LFP batteries floating at 13.6v continuously while living off of pedestal power. I figured I'd try something different this time.
I set the Magnum inverter/ charger to 50a (plugged into 50a service) and turned the charger off so 120v power is just passing through supplying the daily loads and letting the solar charge the batteries of what little was used during the night while the batteries carry the 12v loads (furnace, inside fridge fans, co/ lp detector), but if the there is a power outage the inverter is still on ready to switch back to batteries. When the sun goes down the solar controller goes in to sleep mode no stress on the batteries which settle down to 13.25 - 13.3v through the night. I forgot to look at the actual battery display, the inverter display was showing 13.2v
From roughly 6pm to 6am the DOD is 10% or 50ah cycling the furnace, fridge fans, detector. That little bit of cycling is so mild compared to when I'm boondocking with 30% - 45% (150-225ah).
During the day I'll float using solar after the batteries get full, if there is a power outage I'll be ready to go with batteries topped off.
I believe this will give the best all around compromise while still ready with a full or near full batteries that aren't stressed.
Couple PT readings from the past days while doing this.
