darius7575
New Member
Hi all. Got a problem and was hoping to get some more eyes on this.
Just setup an EG4 3000ehv. I've got 3kw of talesun 385 watt panels in series. Max voltage is about 380v so I've never come close to the limit. Connected via 300amp busbars (with equal length 2 awg cables) to 2 Lossigy 48v 100ah batteries with 125amp mrbf fuses. Been using those for a few months now with no issue when connected to a straight scc. Connected grid power to ac in and a 20 amp strip for the ac out until i can relocate to a transfer switch at my panel. Double checked wire connections at all points are solid.
I have repeatedly (2 or 3 times per day) been getting fault 8, bus over voltage which hangs the system for a few mins until it restarts. If that was all it was i could live with that and i do thorougly enjoy the unit. But every 1 in 5 times it doesnt get handled and the fault won't exit until I manually reset it either locally or in the app. Once in every 10 faults I'll get a fault 3, main undervoltage.
Seems to happen when the battery is either full, or when going from a higher load to a lower load but not all the time. I've double checked that all my battery voltage settings match what the mfg advised.
Been working with a rep from Signature Solar but we haven't come up with anything which made a difference. Anyone have any ideas? Could this unit simply have a physical problem? I did upgrade the firmware. This is a v2 unit.
Tia!
Just setup an EG4 3000ehv. I've got 3kw of talesun 385 watt panels in series. Max voltage is about 380v so I've never come close to the limit. Connected via 300amp busbars (with equal length 2 awg cables) to 2 Lossigy 48v 100ah batteries with 125amp mrbf fuses. Been using those for a few months now with no issue when connected to a straight scc. Connected grid power to ac in and a 20 amp strip for the ac out until i can relocate to a transfer switch at my panel. Double checked wire connections at all points are solid.
I have repeatedly (2 or 3 times per day) been getting fault 8, bus over voltage which hangs the system for a few mins until it restarts. If that was all it was i could live with that and i do thorougly enjoy the unit. But every 1 in 5 times it doesnt get handled and the fault won't exit until I manually reset it either locally or in the app. Once in every 10 faults I'll get a fault 3, main undervoltage.
Seems to happen when the battery is either full, or when going from a higher load to a lower load but not all the time. I've double checked that all my battery voltage settings match what the mfg advised.
Been working with a rep from Signature Solar but we haven't come up with anything which made a difference. Anyone have any ideas? Could this unit simply have a physical problem? I did upgrade the firmware. This is a v2 unit.
Tia!
