Hey folks! I've been using the new Growatt Shiner app, and it's showing some wild numbers. During the sunniest days, it displays over 4500 watts on each string of my solar panels, which seems way off. My panels are rated at 405 watts each, and I have 8 panels per string, so I expect around 3000 watts at most. Is it even feasible for these panels to perform this way, or could there be a glitch in the system? For context, I'm located just north of the 49th parallel with my panels facing due south on a 5/12 pitch roof. I've noticed the readings fluctuate throughout the day, with only a few hundred watts in the morning.
3 Answers
In ideal conditions, you could see upwards of 3800 watts on a very cold day when the sun breaks through the clouds for a bit. But a constant output that high seems off. Are all your strings connected properly?
It sounds like an unusually big jump in wattage to me! Have you thought about using a separate meter to check the voltage and amperage? Sometimes panels can produce more power when they’re cold, but an increase from around 3240 to 4500 watts seems extreme. It might be worth checking your equipment for any issues!
There’s definitely something strange with those readings. While it's true that solar panels can exceed their rated output in certain conditions (like cold weather), going from 3240 watts to 4500 is pretty unrealistic—around a 40% boost just isn't typical. I would suspect there might be a problem with your metering equipment instead.
Yeah, I’ve got multiple strings set up, but they seem to be functioning. It’s really puzzling how the readings can jump around.