Checkthisout
Solar Wizard
- Joined
- Nov 14, 2021
- Messages
- 4,875
Seabear,
Do you have spare MC4's laying around?
If so, make a couple diagnostic connectors. Take a Male and female. In one pin crimp two say, 1' long leads and assemble connector. Then on one of the leads, crimp an opposite sex connector and assemble.
Make two of these. You then have two break-out connectors you can plug in anwhere and check for voltage on the exposed leads. Check at each panel and each connections. Voltage should be the same throughout the system under load.
In other words if you have 40 volts at your panels and 21 at your CC, then you have connector issues etc
Do you have spare MC4's laying around?
If so, make a couple diagnostic connectors. Take a Male and female. In one pin crimp two say, 1' long leads and assemble connector. Then on one of the leads, crimp an opposite sex connector and assemble.
Make two of these. You then have two break-out connectors you can plug in anwhere and check for voltage on the exposed leads. Check at each panel and each connections. Voltage should be the same throughout the system under load.
In other words if you have 40 volts at your panels and 21 at your CC, then you have connector issues etc