How do I know if my solar system is producing what it should be? Finn Peacock August 23, 2017 04:44 Updated Follow We explain this in detail here. Related articles Do I need to have regular maintenance on my solar system? Will my panels still work on overcast days? How often and what should I use to clean my panels? Can I use my Fronius Inverter to charge my Electric Car with excess solar? We've got a 6kw solar system, installed 5 years ago, no problems with it. Howver, its been installed facing North, which is great. Can i just add more panels and another inverter or do i need permission from anyone? Comments 0 comments Please sign in to leave a comment.