One of my Cheapowatts does -just fine- floating at 13.2, taking a prolonged power outage break then picking up the pick and shovel after a power outage. Thirty one amperes. Above Lifeline's 20% minimum.
Wish I had the room to mount the 11uf run capacitor. It definitely helps the PF although by how much is anyone's guess.
DPDT 120vac latching relays are the hot setup for alternative charging sources. "Boing" go the lights. Click goes the relay. Your big mamma be off line until you reset the relay. The red headed stepchild takes over until the latching relay button is pressed again.
I tried that top rated battery floater. Two weeks of hilarity then a pitch into the useless drawer. Connected the Cheapowatt and set it to 13.20 volts.
As long as the beater does not try to make the barge hit eighteen knots going up the Nile, the Cheapo does fine. I.E. Make a wake - attend a wake (The Cheapo's). 350 watts is 350 watts.
Whatever doesn't recycle the lead, Fred...
Best series of twenty-two dollar purchases I ever made.