It would be typical for a rack system to "bond" all panels together that were mounted on the same rail, or in some cases rail to rail bonding is part of the design. In cases where bonding is not part of the design, a ground connected to each panel would be needed.
I am not an experienced roof...
In the case of this post, the use is having the issue even without a load on the inverter. Yes, what the video says is a fact, if there is an effort to deliver X watts or X amps back down the AC line. My grid tie micro inverters are pushing about 250v while I have 245v back at the house.
That seems confusing. Do you have a clamp on DC amp meter? If so, check the battery cable amps for each inverter and see if you can varify this is actually happen as reported by the inverters. The inverters have internal consumption and my Growatt 3000 units, they take this power from the...
Many All In One (AIO) inverters will blend solar, battery, and grid power to power home loads. They have different modes that can be programmed. The typical setup is to move critical loads to the output side of the inverter. In UPS type mode, the grid power can just pass through the inverter...
"I don't want to backfeed my panel because I'd like to use the PV energy as much as reasonable even when we have ongrid power." Sorry but that statement doesn't really make sense. If you put power to the grid, that is the ideal load to fully use all available potential. At any moment, what...
This site is reference vertical, shows 36 degrees for Manchester UK.
PVWatts is reference horizontal. Many of us in the US use this site. My power company wants to see numbers from PVWatts when you do a grid tie agreement prepositional.
An AC thermostat switch should not be used for DC. It can weld shut. You might get by with it at only 12v but I would use some other way to switch DC to a heater.
You will need a control system or a charging system that has switching for transferring load after the battery is charged.....if...