upsolar pv system

[tombennetts]

Hi guys, i have just installed my first pv system for a company that has just been set up (used for mcs accreditation all passed fine) The problem is the system is only generating 800watts an hour on a very nice sunny day. Its a 3.8 ish system with fronius ilgt3.6 inverter. The panels are 17 x 230 watt upsolar panels. The connectors on the panels werent compatible with the standard mc4 connectors so i chopped them off the panel yesterday and changed them so we now have better connections, the weather was awful yesterday so dont yet know if its made any difference. Anyone got any other ideas as to what it could be? shading is not an issue, the roof is south west facing with 35 degree incline, down in cornwall so it should be producing far more than this!
Thanks
Tom

 

[londonlec]

You need to get a solar irradiance meter and calculate it.