YAMLcase
New Member
- Joined
- Oct 13, 2021
- Messages
- 36
new instsaller (me) with a new install been up around 1 week. My system:
- Sol-Ark 12k
- 2 strings of 6x 385W Mission Solar panels (I can go up to 8, so well below the max voltage)
- each panel has Tigo TS4-A-O optimizer
- 2x EG4-LL 48v 100Ah battery banks
first 3 days went fine, then 4th and 6th days I got arc fault alarms that tripped the PV off. Yesterday (the 7th day) I had a strange event happen: Around 4:00 PM Central Texas time my solar production dropped off a cliff and flat-lined at about 50% the peak production. From the graphs, I can summarize:
- Battery voltage shot up from 54.3V to 56.8V
- Battery state-of-charge reached 100%
- MPPT voltage went from ~190 to ~225
- Current dropped from naturally declining with sun exposure (down to ~9A) to flat-lined at ~4A
Update: I just went back to the graphs and noticed that with each arc_fault trip the SOC reached 100% on the batteries. Yesterday the voltage jumping to 56.8V was the first time, each other time the voltage dropped slightly or remained the same.
- Sol-Ark 12k
- 2 strings of 6x 385W Mission Solar panels (I can go up to 8, so well below the max voltage)
- each panel has Tigo TS4-A-O optimizer
- 2x EG4-LL 48v 100Ah battery banks
first 3 days went fine, then 4th and 6th days I got arc fault alarms that tripped the PV off. Yesterday (the 7th day) I had a strange event happen: Around 4:00 PM Central Texas time my solar production dropped off a cliff and flat-lined at about 50% the peak production. From the graphs, I can summarize:
- Battery voltage shot up from 54.3V to 56.8V
- Battery state-of-charge reached 100%
- MPPT voltage went from ~190 to ~225
- Current dropped from naturally declining with sun exposure (down to ~9A) to flat-lined at ~4A
Update: I just went back to the graphs and noticed that with each arc_fault trip the SOC reached 100% on the batteries. Yesterday the voltage jumping to 56.8V was the first time, each other time the voltage dropped slightly or remained the same.
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