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Update: Still working through output voltage fluctuation. Have been in contact with Growatt support and followed their suggestions. Verify cabling: check, over sized and all connections tight. Verify grounding: checks good Reflash to latest firm ware: Loaded up fine with no known issues Do 305...

Can you do a 305 reset and start over?

"one firmware is for MPPT Board, other is for Inverter Board, both need to be flashed. Flash MPPT Board when solar is attached and Solar Icon is illuminated So flash them both with when connected to Solar and battery power (remove load from output)" Don't know if this puts any light on your...

For those struggling with locating a vacuum pump find a compressor out of junk frig or freezer, solder an AC adapter port on suction line and that will provide required vacuum.

So it might have a learning/re-learning feature?

Thought about testing with AC input but than won't help in a power out situation. Being chinese equipment is there even such a thing as "warranty time". Guess I'm hoping the AC Inverter section is a plug and play daughter board. 20 year copier technician, so opening boxs and replacing boards is...

Powered up a new installation last week and having a problem with AC output fluctuation. Growatt 3000 stand alone system with panels and batteries only, designed to be a SHTF backup to power frig, freezer and washing machine. Running 1100 watts with frig and freezer in a steady state will notice...

Bit of an inconvenience but can you just unplug Bluetooth module if worried about dodgy neighbors?