The house bank was just updated with Lithiums (800ah). The lithiums are connected to only the Inverter for supplying 120v to power the fridge, MW, charging devices, floor freezer, etc. Lets call it house bank #1. The daily draw is around 400AH a day on this bank.
The previous house batts were 3x 8D 260ah AGM fullrivers which I moved to power the 12V dc panel (as well as the davits crane and windlass), and to start the two 3208TA. Not sure of the draw but possibly around 200ah/day but I am not totally sure. I am installing a shunt to get a more accurate value.
750W solar panels are connected to the lithiums. Solars provide around 280-320 AH/ day.
A dc2dc was installed to pull 20/40 amps from the starting batteries and send it to the lithiums, when underway.
Overall, house bank #1 is charged by solars+/- alternator when underway.
The starting batteries/house bank #2 are only charged from the alternator when underway.
In an effort to send some charge to house bank #2 for the days on Anchor, I am thinking of installing a Victron dc2dc to take power from the lithiums (house bank #1) and send it to house bank #2 (starting batts & one mode fullriver). In effect sending some of the solar power to house bank #2. I would have to find a way to limit the duration of the power transfer from the lithiums, not sure how to do that right now but working on it.
So I would have 2 dc2dc connected between 2 house banks but going in opposite directions.
Does this make sense or Am I missing something?
Another option is finding a way to split the solar charge between house bank 1. & 2. Possibly with a manual selector. I would leave the Lithium charging profile to the AMG & lithiums. So at 2pm for example , I would manually switch the destination charging from lithium to AGM. I could find a way to get this done automatically yet.
I would appreciate any comments or advice.
Thanks
Raylee
The previous house batts were 3x 8D 260ah AGM fullrivers which I moved to power the 12V dc panel (as well as the davits crane and windlass), and to start the two 3208TA. Not sure of the draw but possibly around 200ah/day but I am not totally sure. I am installing a shunt to get a more accurate value.
750W solar panels are connected to the lithiums. Solars provide around 280-320 AH/ day.
A dc2dc was installed to pull 20/40 amps from the starting batteries and send it to the lithiums, when underway.
Overall, house bank #1 is charged by solars+/- alternator when underway.
The starting batteries/house bank #2 are only charged from the alternator when underway.
In an effort to send some charge to house bank #2 for the days on Anchor, I am thinking of installing a Victron dc2dc to take power from the lithiums (house bank #1) and send it to house bank #2 (starting batts & one mode fullriver). In effect sending some of the solar power to house bank #2. I would have to find a way to limit the duration of the power transfer from the lithiums, not sure how to do that right now but working on it.
So I would have 2 dc2dc connected between 2 house banks but going in opposite directions.
Does this make sense or Am I missing something?
Another option is finding a way to split the solar charge between house bank 1. & 2. Possibly with a manual selector. I would leave the Lithium charging profile to the AMG & lithiums. So at 2pm for example , I would manually switch the destination charging from lithium to AGM. I could find a way to get this done automatically yet.
I would appreciate any comments or advice.
Thanks
Raylee