Intermittent disturbance on Sunny Boy inverter

[Worcester]

We are confused, normal US supply is 110V? Why are you expecting your Inverter to output 220V?

When correctly set up it is designed to match Grid Voltage and Frequency (US 110V 60Hz, UK 230V 50Hz)

When the inverter boots up it displays its configuration standard.

Disconnect the grid to it (isolator or breaker) and then isolate the dc supply (worst case pull the SMA 'Sunswitch' DC link out of the bottom) then reconnect the DC and then the AC - the order is important as you don't want to disconnect or reconnect the DC under load
As the inverter boots up it will display the grid connection standard that it is configured to (UK gnerally is G83/2 = 230V, 5oHz)
I doubt that the display is wrong, more that you are expecting a different reading.

When we know the standard that the inverter has been configured to we can advise on what Voltage output it would give.

 

[Worcester]

.duplicate post deleted

 

[NeilOrme]

We are confused, normal US supply is 110V? Why are you expecting your Inverter to output 220V?

When correctly set up it is designed to match Grid Voltage and Frequency (US 110V 60Hz, UK 230V 50Hz)

When the inverter boots up it displays its configuration standard.

Disconnect the grid to it (isolator or breaker) and then isolate the dc supply (worst case pull the SMA 'Sunswitch' DC link out of the bottom) then reconnect the DC and then the AC - the order is important as you don't want to disconnect or reconnect the DC under load
As the inverter boots up it will display the grid connection standard that it is configured to (UK gnerally is G83/2 = 230V, 5oHz)
I doubt that the display is wrong, more that you are expecting a different reading.

When we know the standard that the inverter has been configured to we can advise on what Voltage output it would give.

Yes 110VAC 60Hz is normal (or perhaps 117VAC) and 220VAC is expected leg-to-leg. Actually, higher than 220VAC due to the push method that Sunny Boy uses. If the display is correct, maybe it's per leg. I'll check on that.

 

[bluenev]

In the US you are supplied with 2 phases (legs) and a neutral. Eg 2 x 110 at 60hz. Between the legs(phases) you see around 210Vac, typically used for your larger appliances e.g. oven/cooker or aircon.
If the US inverter is connected to one leg(phase) it will see 110Vac at 60hz and match that. So the inverter is correctly measuring the voltage. I would trust the inverter.
My inverter was ramping up the voltage to match the mains, nominal 230Vac(212-253)... it was sending 264Vac and shutting down. [It looks like my inverter is set to the old 240(220-263 volts range UK standard). An engineer fixed the village supply back to 240 as it showed the maximum allowed of 253Vac at night when noone was generating.
I repeat... i would trust the inverter and measure the voltage where mains cable goes into the inverter... not leg-2-leg somewhere else.
On another note. Do you have a generation meter? Do you receive payments from the city/state for the energy you generate like we do here in the UK?