txhackertracker
New Member
- Joined
- Jul 28, 2022
- Messages
- 4
i am new to the forum and new to solar, so forgive me for such an elementary question. I wanted to dip my toes in the water and build a solar powered water pumping system to begin with. I purchased 2x 18V 100 watt panels... i was expecting 5A each. However, in full sun angled to minimize shadow, my measurements appear off by a factor of 10x. Can anyone tell me what am I doing wrong? Did I get 2 bad panels? Am I measuring wrong with my multimeter? If it matters, I measured both panels and the voltage/amps are within hundredths of a decimal point difference. Pictures shown below to help diagnose. Thank you in advance!!!
SPECS (from the sticker on the back of the panel)
PANELS AS SET FOR TESTING - Zero shade. Angled to minimize shadow (e.g. directly facing the sun).
VOLTS - Measured 19V. Specs show 18V.
AMPS. <- Here is where i think i have a problem. Notice it is only 0.5A - NOT 5A.
SPECS (from the sticker on the back of the panel)
PANELS AS SET FOR TESTING - Zero shade. Angled to minimize shadow (e.g. directly facing the sun).
VOLTS - Measured 19V. Specs show 18V.
AMPS. <- Here is where i think i have a problem. Notice it is only 0.5A - NOT 5A.