Morningstar 30amp solar charger display
The digital display on my Morningstar PWM 30amp solar charger shows battery volts and amps. When the display reads 7amps is that telling me what the panels are producing or is it the amps that the bat...
Forum Discussion
MrWizard wrote:
as the battery charges, it's internal resistance increases, so current flow will drop, increasing to voltage to set limit allows the battery to keep accepting charge current
This always gets to me. Voltage potential of the battery increases as it charges. Eventually the potential matches the supply and current stops except for the power lost to electrolysis.
Actual resistance is lowest when fully charged and increases as it discharges. Pure water (discharged) is a relatively poor conductor vs 30% acid solution with many available ions is far more conductive(charged). And yes the two (voltage potential & resistance) interact together as a battery charges and discharges to create the natural absorption rate for charging or voltage drop during discharge.
There is a resistance graph in Battery University website if I need to dig it up.
And I understand the layman's term of increasing resistance is easier at times to explain the process.
