WorldwideDave
Solar Enthusiast
Equipment:
Day started with 100% SOC.
Used to have 2s2p connected to the victron 100/20 SCC. Was not producing more than 1.7 kWh daily.
Got outback FM80 connected to bus bar. Connected 2s3p to the outback. Outback FM80 produced 3.3 kWh today; Victron 100/20 did 930 Watt hour with 2s2p.
This morning, as soon as sun was bringing in about 400 W of power to the shunt, I fired up inverter, and started my pool pump and heater.
Battery SOC was high after 3 hour program of pool pump ran, so ran again for another 3 hours. Goal is 8 hours daily. After 6 hours, the pump stopped as scheduled. No issues. Battery was at about 90%, went inside the house for an hour.
Came back out, and decided to go swimming. Started up the pool and heater. SOC was still around 89%. After about 10 minutes, started to hear a beep.
I assumed the beep - it was so faint - was from the new outback FM80 SCC. Turns out it was from the cerbo GX. Looked on my phone, and it said battery overtemp warning. I stopped the heater. I stopped the pump. I stopped the inverter. I touched the conductors (2/0) going to the battery. They weren't hot. The lugs weren't hot. The battery post itself was very warm, but not hot enough to burn me.
I waited 5 minutes, and started up the inverter, the pump, and the heater again. No issues.
I usually cannot run the heater for this long due to low SOC after running pump for 3 hours. But with all this new amperage charging the batteries, I can run for 6-8 hours on paper.
I have never gotten an alarm like that. It made me scared. What do we think is the issue here? Battery rated for 100 A discharge, but prefers 60 A constant or less I read. That being said, it's a 120V pool pump and 120V pool heater, and the inverter itself, so I don't know how many amps I was running, but the system did not like it.
Fast forward a few hours. The pool pump and heater were off. The Giandell inverter started making alarm noises itself (much louder than victron - could hear from outside my property and hurried back). Turns out the voltage was somewhere around 14.5 V, which I think is what the Victron SCC is set to (based on Will and others' recommendation). Looks like cutoff for Giandell is at 16 V - from manual: Over-voltage Shutdown: 16V±0.5VDC so 15.5. Maybe it reached 15.5 and shut down? I don't see an over-voltage alarm. Just shutdown. Also the victron is unaware of the Giandell, so alarm was not from the Victron. Also according to the victron VRM reports, SOC never hit below 50% today at all.
I tried to turn the inverter on and just run the pump to lower the battery SOC, but by the time the pump started, the inverter shut down. I turned off the breakers from the panels to the SCC. That way the SOC would not increase why I diagnosed the issue.
After 5 minutes, started system back up, and it was fine. So I turned back on the breakers from the array to the FM 80 SCC. No problems the rest of the day.
The VRM also shows that Victron SCC was in following states, in order: Off, Absorb, Float, Absorb again, Float, then Absorb, then off.
VRM shows the Victron SCC went up to its max 20 Amps today. PV Voltage hit 56.5 once.
My battery temperature sensor went from 55 degrees F up to 100 degrees F, then back down to 70 degrees, then slowly over 4 hours went up to 122 degrees F (I assume alarm went off then), and then back down to 64 degrees.
I do see the consumed amp hours went as high or low as -1.70 Ah, meaning that it was almost at zero at some point. I think that the reports are 15 minute intervals.
When the incident happened (full shut down from inverter) the battery power was at -697 W. Not sure if that is meaningful, but it was the lowest of the day by about 100 watts.
The battery voltage and current hit its lowest point when this happened today. Battery voltage was 12.6, but current (A) was at -55.30.
I'm wondering if the pool pump, which was running a bit faster RPMs today, is drawing close to the 60 amp current and shutting something down.
- 12V LiFePO4 200 Ah, only one.
- bus bars
- kill switch
- inline fuses
- victron 100/20 solar charge controller
- victron 500A shunt with temp sensor connected to positive battery post.
- victron cerbo gx
- outback FM 80 solar charge controller
- Giandell 2000W inverter
- 13 of 28 panels racked; 10 connected; 200W BPSolar
Day started with 100% SOC.
Used to have 2s2p connected to the victron 100/20 SCC. Was not producing more than 1.7 kWh daily.
Got outback FM80 connected to bus bar. Connected 2s3p to the outback. Outback FM80 produced 3.3 kWh today; Victron 100/20 did 930 Watt hour with 2s2p.
This morning, as soon as sun was bringing in about 400 W of power to the shunt, I fired up inverter, and started my pool pump and heater.
Battery SOC was high after 3 hour program of pool pump ran, so ran again for another 3 hours. Goal is 8 hours daily. After 6 hours, the pump stopped as scheduled. No issues. Battery was at about 90%, went inside the house for an hour.
Came back out, and decided to go swimming. Started up the pool and heater. SOC was still around 89%. After about 10 minutes, started to hear a beep.
I assumed the beep - it was so faint - was from the new outback FM80 SCC. Turns out it was from the cerbo GX. Looked on my phone, and it said battery overtemp warning. I stopped the heater. I stopped the pump. I stopped the inverter. I touched the conductors (2/0) going to the battery. They weren't hot. The lugs weren't hot. The battery post itself was very warm, but not hot enough to burn me.
I waited 5 minutes, and started up the inverter, the pump, and the heater again. No issues.
I usually cannot run the heater for this long due to low SOC after running pump for 3 hours. But with all this new amperage charging the batteries, I can run for 6-8 hours on paper.
I have never gotten an alarm like that. It made me scared. What do we think is the issue here? Battery rated for 100 A discharge, but prefers 60 A constant or less I read. That being said, it's a 120V pool pump and 120V pool heater, and the inverter itself, so I don't know how many amps I was running, but the system did not like it.
Fast forward a few hours. The pool pump and heater were off. The Giandell inverter started making alarm noises itself (much louder than victron - could hear from outside my property and hurried back). Turns out the voltage was somewhere around 14.5 V, which I think is what the Victron SCC is set to (based on Will and others' recommendation). Looks like cutoff for Giandell is at 16 V - from manual: Over-voltage Shutdown: 16V±0.5VDC so 15.5. Maybe it reached 15.5 and shut down? I don't see an over-voltage alarm. Just shutdown. Also the victron is unaware of the Giandell, so alarm was not from the Victron. Also according to the victron VRM reports, SOC never hit below 50% today at all.
I tried to turn the inverter on and just run the pump to lower the battery SOC, but by the time the pump started, the inverter shut down. I turned off the breakers from the panels to the SCC. That way the SOC would not increase why I diagnosed the issue.
After 5 minutes, started system back up, and it was fine. So I turned back on the breakers from the array to the FM 80 SCC. No problems the rest of the day.
The VRM also shows that Victron SCC was in following states, in order: Off, Absorb, Float, Absorb again, Float, then Absorb, then off.
VRM shows the Victron SCC went up to its max 20 Amps today. PV Voltage hit 56.5 once.
My battery temperature sensor went from 55 degrees F up to 100 degrees F, then back down to 70 degrees, then slowly over 4 hours went up to 122 degrees F (I assume alarm went off then), and then back down to 64 degrees.
I do see the consumed amp hours went as high or low as -1.70 Ah, meaning that it was almost at zero at some point. I think that the reports are 15 minute intervals.
When the incident happened (full shut down from inverter) the battery power was at -697 W. Not sure if that is meaningful, but it was the lowest of the day by about 100 watts.
The battery voltage and current hit its lowest point when this happened today. Battery voltage was 12.6, but current (A) was at -55.30.
I'm wondering if the pool pump, which was running a bit faster RPMs today, is drawing close to the 60 amp current and shutting something down.