Pairing up the Eco-worthy 20a MPPT controller
Thanks to BFL confirming that the Eco-Worthy controller plays well when run with another controller, I felt pretty good about combining my two matched controllers. Each had one of the Bosch 245w mono ...
Forum Discussion
This was all with a 24v panel.
The Isc of the 24v panel is about half what the Isc is of the same wattage 12v panel, you need to "buck" that amperage to what you would get with no buck using 12v panels.
Perhaps my 230w panel that does about 15.5a in MPPT (which is on only in Bulk) where 230w of PWM would do 14.5amps, will only do 14.5 amps in Absorb or Float when the controller is "in PWM."
That is still way over panel Isc of 8.3a. IE, it still bucks the amps to make up for being 24v instead of 12v.
Voltage regulation to limit battery voltage at say 14.x volts is common to both PWM and MPPT controllers.
The "controlled" voltage levels are not to be confused with going from 36v panel ("24v") to "12v" battery or 22v ("12v") panel to "12v" battery which is all this DC to DC business.
The Isc of the 24v panel is about half what the Isc is of the same wattage 12v panel, you need to "buck" that amperage to what you would get with no buck using 12v panels.
Perhaps my 230w panel that does about 15.5a in MPPT (which is on only in Bulk) where 230w of PWM would do 14.5amps, will only do 14.5 amps in Absorb or Float when the controller is "in PWM."
That is still way over panel Isc of 8.3a. IE, it still bucks the amps to make up for being 24v instead of 12v.
Voltage regulation to limit battery voltage at say 14.x volts is common to both PWM and MPPT controllers.
The "controlled" voltage levels are not to be confused with going from 36v panel ("24v") to "12v" battery or 22v ("12v") panel to "12v" battery which is all this DC to DC business.
