Jul-24-2023 05:42 PM
Jul-26-2023 09:23 PM
CA Traveler wrote:
Sounds like a short. A shorted bypass diode would not change the amps, assuming multiple diodes.
Jul-26-2023 09:10 PM
bigfootford wrote:
Well I have never seen this phenomenon...hahahaaa.
Spec ISC and low Voc.. Like a bypass diode shorted but why is the ISC at spec. Going to have to see if there is an answer from someone else or join the Northern Arizona solar elect forum... I am a member over there. If you get no answer and can not become a member when I get some free time next week I will ask over there.
Jim
https://forum.solar-electric.com/
Jul-26-2023 05:51 PM
Jul-26-2023 05:39 PM
Jul-26-2023 04:44 PM
Jul-26-2023 04:15 PM
bigfootford wrote:Thanks Jim, so I just checked the current using the 10 amp position on the DMM and I read close to 6 Amps (see picture). When I read the open circuit voltage it's 12.8VDC. This is with the panel disconnected from the controller. The current looks fine but the voltage is not high enough to get the controller to charge the battery more than a few milliamps even when the battery is under 12 volts. It's almost like this solar panel has a built-in regulator of its own. I can not see underneath it to read the specifications or brand, so i will have to remove it.
With most DVM's, set the meter to 10 amps and move the lead to the 10 amp position. If you do not you will blow the internal protection fuse for the lower amp readings.
Jim.
Jul-26-2023 09:48 AM
Jul-25-2023 08:47 AM
Jul-25-2023 03:28 AM
Jul-24-2023 07:25 PM
CA Traveler wrote:
Are you using a digital meter with the panel in full sun? Voc (open circuit) and Isc (short circuit) are 2 basic checks for panel. A 100W 12V panel should have about Voc=18V+ and Isc=3A+.
Jul-24-2023 06:17 PM