Solis disabling backup supply socket

Any chance there was a firmware update?

Odd one alright I assume that other settings are sticking?

I don't have that setup myself or even the knowledge on it. But just thinking through troubleshooting steps..as there is some fault that won't just resolve itself. So Solis disables that backup power supply and unknown why

If 1) firmware hasn’t changed 2) Solis settings haven't changed 3) and network kit plugged into it hasn’t changed then could be a few things  

To rule out the network kit, does other non-network gear connected to the power supply? And remove the power block too and put in another, So could plug in a light and fan and leave them on. If it’s anything plugged into it, then it’s back with Solis. If that doesn’t disable it, could you plug stuff in one at a time and see if it’s one of those devices Solis is getting cranky with? As in power the rest of the stuff to the house for now.

Putting it out there. Could it be down to temp somehow if it’s only setup a few months? Attic is much colder now for 1st time since you set it up. I did once heard of a fault on a server motherboard. Change in temp caused something loose to move ever so slightly. Meant the device went on and off depending on it’s temp. Or devices are doing something else to increase their temp? Seems weird though.

Could the network kit be drawing more load now somehow and Solis doesn’t like that?

Could raise a ticket with Solis now so it’s in the queue. Then can add in more detail when you have tested other things. If it's a known issue, they should have a workaround or fix

Any logs you can get on the Solis to see if it shows a reason?

Something else?

Are you overloading the backup by any chance? Even the largest Solis invertor available can supply 5kW max on the backup supply. What make of battery are you using?

Who did you call, Solis or Dyness? How did they push it, through Ethernet connection?

Strange that it worked for them. Those batteries are only rated at 50Amps continuous, do you have 2 in parallel giving 100Amps?

What did Solis say about the backup supply? I've mine supplying the whole house, just the heavy loads such as the electric cooker and immersion are on the shared supply, no issues here......Yet....

The 5kW models?

Well that limit is imposed by ESB. No more than 6kW is allowed to be exported, so the inverters don't come with the ability to draw more the 5kW from the batteries. I don't know how that works with Tesla's Powerwall, it's supposed to be able to supply over 10kW, maybe it will just never export that much.....

Any word on what happened with your backup supply?

Exactly, they allow you to set it, so an 8kW inverter could be set by the owner to export 8kW, which ESB don't want, so any bigger than 6kW SP are essentially illegal in Ireland. That's why the manufacturers don't bother with anything over 5kW from battery for this market.

That backup supply issue is strange. I had a similar issue when there was intermittent strong sunshine. The constant surges from discharge to charge was causing voltage spikes, tripping the battery on overvoltage, which also tripped out the invertor via the BMS. I limited the OV voltage in the invertor settings and it solved the problem, no thanks to my useless, now former, installer. They hadn't a clue what was wrong. The backup supply never defaulted to disabled on mine however.

Now I'm having the issue of charge and discharge settings being stuck on 70Amps. What's the number you used to contact Solis please? What information do they require to find my inverter?

Cheers.

Cheers, I sent them an email with the model number and serial number, hopefully that's enough. It must be one of their firmware updates that's caused this.

Here's a 'fix' I came up with. Go to advanced settings and select "No Battery" exit save. Then go back in and select whatever your brand is in the menu. Exit save. Then select battery wakeup. Mine has now reset to BMS control. Be warned, if you have a Puredrive battery, the infamous No Batt Name firmware bug will raise its ugly head if you got your battery in the last few months.