Hey there, I've got a 450W solar panel linked to my Delta 2 Max power station. Right now, I'm seeing an input of 322 watts, but I expected to get around 425 watts. My setup has a voltage of 45VDC and I'm measuring 9.5 amps. I'm just wondering why the output isn't as high as I anticipated. Is my power station limiting the solar input?
3 Answers
Yeah, it seems like you’re pretty much on target with your expectations, but factors like the angle of your panel and the temperature can really lower output. Solar panels usually produce their max wattage only under perfect conditions. Even I have a larger setup that rarely hits peak output during the day.
Just a heads-up, the manufacturer's numbers are based on ideal lab conditions, which don’t reflect real-world usage. So don’t be too surprised if you get lower wattage like you mentioned with your 322W—it's pretty normal!
You might be measuring the voltage and amperage incorrectly. When testing, you need to use a solar panel tester that gives you the actual operating voltage (Vmp) and current (Imp), not just the open circuit voltage (Voc) or short circuit current (Isc). Try using a DC clamp meter while the panel is under load. It would give you a better idea of what's happening with your setup.
Thanks for the tips! I measured the open circuit voltage, but the amps were under load. I’ll make sure to test it like you said.
Totally agree! The OP needs to clarify how they are measuring, plus things like air quality and sun positioning really affect output.