Topping up batteries from normal 15A wall outlet

[Jim Lee]

Model?

Model?

Growatt 5000 ES purchased from Signature solar

 

[sunshine_eggo]

Even with Lithium, it's still ON/OFF, just based on %, not voltages. Still no absorption or float.

 

[ghostwriter66]

I thought that the consensus on this forum was that the Growatt 5000 ES is safe so long as you don't use the AC input? That's why I was trying to avoid using the AC in on the growatt.

Do you disagree?

I am as safe as the next girl -- well try to be - sure I have caused a "few" fires at work - but who hasn't ... come on man ... its not like i work at a major oil refinery ... well -- BUT honestly - I would let the GROWATT do the charging ... but either way would work

 

[Jim Lee]

You've probably missed the boat on this one. SignatureSolar has been offering a EU spec inverter running at 240VAC/60Hz single phase coupled with an auto transformer to provide 120/240VAC split phase. There have been some threads on it in the last few months.

This is also how many Victron systems get installed in the U.S. - Get their bigger higher power units that are 230VAC/50Hz and run them at 240VAC/60Hz coupled with a Victron autotransformer for 120/240VAC split phase.

I have 4 Growatt 5000 ES from SS and 30 Kwh of LiFe batteries. My batteries barely last 1 night. I also have a 22Kw Generac whole house generator. During a prolonged power outage my generac would auto start and supply power the the house same as grid bypass does, but the cost to run 24hr/day would be outrageous. Could I just change setting 14 from "Only Solar" to "Solar and utility" charging and have the generac charge the batteries 2 or 3 hours then turn off the generator and switch back to solar only and run off solar and batteries tiil depleted and repeat the process. would that work?