PV Gap

Josephine Said:

My 50 watts at 18v solar panel and 100amp battery at standard use 13.5-13.8 can this two work?

We Answered:

You've only listed three components and
proved that two are nominal.
(I assume the "controller" is an inverter/charger unit,
and that the 13.8 V. indicates the battery is fully charged.)
It's either your connections or the "controller".
Before you panic, re-read the manual and check
all your connections and control settings.

Patricia Said:

can a 50 watts solar panel charge a 100amp battery?

We Answered:

Sandy is correct. If you have a 12 volt battery, and the solar panel puts out a max of 8 volts, you will never charge the battery.

In real life, you would put some electronics between the array and the battery to control the rate of charge, when you get the voltages corrected. If not, you could overcharge and damage the battery.

Actually, if you did this installation without even checking the voltages, you need to get it reviewed by a good electrician or electronics technician.