We've recently got a system installed, here's what it looks like.
2x 5kva Axpert inverters
2x banks of 4 batteries each
2x banks of 8x250w solar panels (16 solar panels )
each pair is for separate floors in the house for load management
now, we installed it a few days ago when we had a lot of rains and every day was cloudy. So we couldn't really load test the system.
Today was the very first day when we had clear blue skies (Lahore) and we found out that the solar panels are producing only 1000watts maximum- we took the reading at around 1:30 PM ( when I say the panels are producing 1000 watts, remember that 8x250w panels are connected to each single inverter, so that's 2000 watts per inverter ).
the installer told us that we can expect max 75% output from the panels, but as you can see they are only producing 50% (both inverters Were showing 1000watts each) . We are not sure if this is due to line losses, config issues, bad hardware or the installer simply lying.
We have the solar panels on the roof (obviously ) and facing more or less true South , with an angle of 27. No dirt or some such on the panels. No shadows, we even ensured there are no shadows from the front row of panels on the ones at the back as they are sufficiently apart. Very large roof.
the other issue with the inverters is that we can't seem to connect with the usb or serial port connectors no matter what. We called up the main vendor (it's voltronic/Axpert but it's from inverx) in Karachi and one of the tech support guys said they have blocked the ports on purpose so that people wouldn't mess around with them, and that the function is available on infini models (wont the vendors mess around with them then ? Genius logic ! Pay more money for premium features ) .
Has anyone got some ideas about what the issue would be ?