no amps on a new system

[stodsy]

hi i have just done a 4kw system it is with sanyo panels and a power 1 inverter 2 strings of 8 and its on a south faceing roof but it is only doing 9 units a day i have 330 volts on each string but very little amps i have had a look at every connection and all looks good i have looked at reverse polarity and that looks ok as well any help would gratefull thats alan :coffee:

 

[daytona600]

is it 16 x sanyo250 and pvi-3.6 inverter

 

[stodsy]

hi daytona yes it is have you any ideas thanks

 

[yellowvanman]

Did you do your Isc tests for each panel before you installed and the Isc test for the string? Whats the Isc now?

 

[stodsy]

yes we did mate but now when i put the clamp meter on its a real bad reading on both strings

 

[yellowvanman]

Don't think there is an easy way to find the problem, still got scaffolding up? You'll have to test each panel in turn. Strange that both strings are playing up though!

 

[stodsy]

yes mate the scaff is still up iam back there on tuesday i was hopeing for a easy way out iam now going 2 take evey panel off not good

 

[edexlab]

What has the weather been like since you've installed , 9 units does seem a bit low

This may be another reason for low output;
I ve had a 4kw running over the weekend in a rural area which did'nt want to start up straightaway as the local voltage was highish (245 v) ,anyway waited awhile and it started up ok when the voltage came down about 5 volts its been running and then reverting to standby whenever the local voltage rises, this could be happening in your area and be affecting your install
I'd advise you to keep an eye on the voltage readings if possible as you may need to contact your DNO to get the taps on the transformer adjusted

 

[SolarCity]

9 units is definitely low. I don't suppose the scaffold is shading the array is it?

What kind of reading are you getting for amps?