This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
Looking to size a Victron Smartsolar Mppt controller to two LG 375 Watt panels in series, feeding a 48V lifepo4 battery bank bank.
RIght now my calculations tell me I need a 20 amp charge controller, however Victron does not make a 20 amp controller that supports a 48V battery bank.
Looks like Victron makes the MPPT 150/45-Tr amp but it does not look very common or available. the next up is the SmartSolar MPPT 150/60-Tr.
What would be the best smart controller to run this set up?
Thanks P
The 100/20 is a 20A controller that supports 48V systems.
Though I am not sure what the open circuit voltage of your two LG panels in series is, perhaps over 100V in cold weather?
Guy
Thanks for making me aware that the 100/20 does support a 48 V battery bank.
The open circuit voltage on the LG 375 is 40.3 per panel so in series this is still below the 100v limit.
Are my calculations correct that I would need a 20A controller to run 2 x 375W panels connected to a 48V bank?
Thanks in advance.
P
That sounds fine from an ampere current sizing perspective.
I'd suggest to use this tool to confirm the low temp voltage - http://mppt.victronenergy.com
