Solar CHarge Controller Question- shows fully charge when not.
I have purchased 2 solar charge controllers on Amazon- and both have failed.
https://www.amazon.com/gp/product/B01J0QCDWW/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 I have 3, 100 watt panels wired at 12 volts. And I have 3 100AH AGM batteries.
The last charge controller I bought - kept showing my batteries as fully charged, green light and stopped charging- however the battery bank was at 11.9 volts-- fully charge should be near 13 volts. So I bought another 30AMP solar charge controlerr- followed directions and when I connect the battery it shows FULL 100% CHARGE.. I check my battery with my meter- and seperate elec gauge and both show 11.9.
Any ideas? I am a newby at this- but it is a simple hookup- every charge controller I try- shows my batteries at FULL charge and stops charging, but when I check with a meter- the batteries are near dead at 11.9.