If you are thinking about SOLAR or already have SOLAR, you may want to take a look at the VIDEO link in the "
RVing with SOLAR" social group, scroll down to the "SOLAR - PWM vs MPPT VIDEO 2" post. It does a nice comparison between PWM and MPPT SOLAR Charge Controllers. It is a GREAT video that explains the difference in NON-ROCKET SCIENCE terms and shows the output differences in easy to understand numbers.
Don