provided 2 to 8% more overcharge compared to
a conventional DC constant voltage charger.
A number of tests and studies have demonstrated
that Morningstar’s PWM algorithm provides
superior battery charge acceptance. An attached
graph (reference 5, attached) compares the
recharging ability of a Morningstar SunSaver
PWM controller with a leading on-off regulator.
This study, done by Morningstar, is a side-by-side
test with identical test conditions. The PWM
controller put 20% to 30% more of the energy
generated by the solar array into the battery than
the on-off regulator.