inexpensive panels
Hi all, I know nothing about this firm--but the prices appear to be low: https://www.santansolar.com/?fbclid=IwAR17Xx_DhkB3h13BFmTjqejxTlf92ZO7UsVEAiNjNmcyNzrOkJx9XgYN26c
Forum Discussion
Output for a 12v battery system is 14.+ volts
Or the batteries will not get fully charged,
PWM will supply nearly the same output amps as
The panel produces, but at a reduced 14v , meaning less actual watts charge into the battery,
MPPT "maximum power point tracking" makes sure the battery is supplied with nearly everything the panel is putting out, it reduces the voltage from the panel, but increases the amps going to the battery so nearly all the watts of power goto the battery, the MPPT controller is a DC to DC voltage converter,
Example 30v at 6amps from a panel is 180w
15v at 6 amps PWM is 90w to battery
The MPPT controller will supply most of the 180w solar power for charging instead of cutting it in half, somewhere like 140 to 160 watts, control output amps would likely be around 10+ amps , there is some controller conversion loss, they are not 100% efficent, that's why they big finned heatsinks to disperse the heat produced in the conversion, just like chargers, converters, and inverters
Or the batteries will not get fully charged,
PWM will supply nearly the same output amps as
The panel produces, but at a reduced 14v , meaning less actual watts charge into the battery,
MPPT "maximum power point tracking" makes sure the battery is supplied with nearly everything the panel is putting out, it reduces the voltage from the panel, but increases the amps going to the battery so nearly all the watts of power goto the battery, the MPPT controller is a DC to DC voltage converter,
Example 30v at 6amps from a panel is 180w
15v at 6 amps PWM is 90w to battery
The MPPT controller will supply most of the 180w solar power for charging instead of cutting it in half, somewhere like 140 to 160 watts, control output amps would likely be around 10+ amps , there is some controller conversion loss, they are not 100% efficent, that's why they big finned heatsinks to disperse the heat produced in the conversion, just like chargers, converters, and inverters
