I'm a newbie here and new with solar design and setup. Any insight or guidance the group can provide is very much appreciated...
I installed a system in my RV and all has gone well except for an apparent battery limit to 50%-55% DOD, but I am still in the testing phase. My current setup: 8 SOK 12V LifePo4 batteries wired in series for 24V. I have a battery balancer for each pair of batteries. Using two Victron Multiplus 24V 3000 inverters and ten 215W panels on the roof of my RV. At this point, I have only tested the system without the panels as I am testing how long I can run the AC with a soft start installed from the battery bank without PV input.
I seem to have hit a major DOD discharge roadblock and I can't figure out why. I can only discharge to about 50%-55% before the voltage plummets and shuts the system down after about 9 to 10 hours of continuous run time. When the voltage plummets it still shows about 6 hours of run time left. My midpoint overs around 0.1-0.2 during normal discharge and then to 0.4 during the end of discharge. The load that I'm pulling while performing this test is about 42A and 1050W for the entire 9 to 10 hour period.
When I set up the system, I fully charged all the batteries and then let them settle for about 3 days so they were all at 13.5 before connecting them. At rest the midpoint is .0 or 0.1. The only time midpoint skyrockets is when recharging hits close to 98-100% then its very hard to control and will hit 3-6%.
What might be the cause of my limit to 50% DOD? Am I expecting too much? How should I proceed?
Thanks!
The most relevant Victron Settings are as follows:
Charger:
Charge current: 70A
Absorption voltage: 28.8
Float voltage: 27.20
Repeated absorption time: 3.00h
Absorption time: 3h
Inverter:
DC input low shutdown: 23.00V
DC input low restart: 24V
DC input low pre alarm 24V
I installed a system in my RV and all has gone well except for an apparent battery limit to 50%-55% DOD, but I am still in the testing phase. My current setup: 8 SOK 12V LifePo4 batteries wired in series for 24V. I have a battery balancer for each pair of batteries. Using two Victron Multiplus 24V 3000 inverters and ten 215W panels on the roof of my RV. At this point, I have only tested the system without the panels as I am testing how long I can run the AC with a soft start installed from the battery bank without PV input.
I seem to have hit a major DOD discharge roadblock and I can't figure out why. I can only discharge to about 50%-55% before the voltage plummets and shuts the system down after about 9 to 10 hours of continuous run time. When the voltage plummets it still shows about 6 hours of run time left. My midpoint overs around 0.1-0.2 during normal discharge and then to 0.4 during the end of discharge. The load that I'm pulling while performing this test is about 42A and 1050W for the entire 9 to 10 hour period.
When I set up the system, I fully charged all the batteries and then let them settle for about 3 days so they were all at 13.5 before connecting them. At rest the midpoint is .0 or 0.1. The only time midpoint skyrockets is when recharging hits close to 98-100% then its very hard to control and will hit 3-6%.
What might be the cause of my limit to 50% DOD? Am I expecting too much? How should I proceed?
Thanks!
The most relevant Victron Settings are as follows:
Charger:
Charge current: 70A
Absorption voltage: 28.8
Float voltage: 27.20
Repeated absorption time: 3.00h
Absorption time: 3h
Inverter:
DC input low shutdown: 23.00V
DC input low restart: 24V
DC input low pre alarm 24V