Hi Guys
Looking for clarification please?
I have a vehicle with a Vsr factory fitted that charges the AGM battery leisure battery. This battery is 80amp and supplies the internal lights and the van diesel heater. I have a dometic fridge that claims to use 80 watts on 12 volts. I have been unable to leave this on at night as the voltage drops too low and I have been un plugging it.
To provide additional usage time I purchased 2 x 120 w solar panels that add power to both the leisure and the starter battery via an Epever duo racer mppt solar charge controller. This rechargers the batteries and powers the fridge on sunny days but still doesn't allow the fridge to make it through the night. Due to the size of the AGM.
Then I managed to secure a lithium valence u27- xp12 which I plan to use just for the fridge. I have bought a Renogy DCC50S to charge the lithium circuit.
The aim is to be able to operate off grid for a few days at a time. I found this website and notice the comments about alternators being over stressed by Renegy high amp draws.
My questions are
1.since the Dc-Dc is connected to starter battery doesn't it only draw from the battery when it has more than 13.6 volts either when the engine is going or when it is fully charged and being topped up by the solar unit? The cable size I was going to use to connect starter battery to Renegy is 35mm I know it's over spec but it came from a welding friend.
2.I am planning to switch the Agm off if using the Renogy to lithium. Will manual kill switches be suitable ?
3. If I separate the solar panels and feed 1 to the Renogy it should throttle back the Dc-Dc to 25amps if have I interpreted the manual correctly? Daylight only.
4. If I uprate the cables to and from the Vsr to Agm could I fit a marine 2 battery selector switch and direct power from either the Agm or to the Dc-Dc and lithium circuit?
I am not able to fit the lithium in the Agm position and was looking to have dual leisure options to increase my off grid time.
Cheers all sorry if these questions have been answered elsewhere been concentrating on the Renogy ones. ?
Looking for clarification please?
I have a vehicle with a Vsr factory fitted that charges the AGM battery leisure battery. This battery is 80amp and supplies the internal lights and the van diesel heater. I have a dometic fridge that claims to use 80 watts on 12 volts. I have been unable to leave this on at night as the voltage drops too low and I have been un plugging it.
To provide additional usage time I purchased 2 x 120 w solar panels that add power to both the leisure and the starter battery via an Epever duo racer mppt solar charge controller. This rechargers the batteries and powers the fridge on sunny days but still doesn't allow the fridge to make it through the night. Due to the size of the AGM.
Then I managed to secure a lithium valence u27- xp12 which I plan to use just for the fridge. I have bought a Renogy DCC50S to charge the lithium circuit.
The aim is to be able to operate off grid for a few days at a time. I found this website and notice the comments about alternators being over stressed by Renegy high amp draws.
My questions are
1.since the Dc-Dc is connected to starter battery doesn't it only draw from the battery when it has more than 13.6 volts either when the engine is going or when it is fully charged and being topped up by the solar unit? The cable size I was going to use to connect starter battery to Renegy is 35mm I know it's over spec but it came from a welding friend.
2.I am planning to switch the Agm off if using the Renogy to lithium. Will manual kill switches be suitable ?
3. If I separate the solar panels and feed 1 to the Renogy it should throttle back the Dc-Dc to 25amps if have I interpreted the manual correctly? Daylight only.
4. If I uprate the cables to and from the Vsr to Agm could I fit a marine 2 battery selector switch and direct power from either the Agm or to the Dc-Dc and lithium circuit?
I am not able to fit the lithium in the Agm position and was looking to have dual leisure options to increase my off grid time.
Cheers all sorry if these questions have been answered elsewhere been concentrating on the Renogy ones. ?