The best photovoltaic solar panels
Thought I would share some information on what are rated as the best/most efficient panels available. Sanyo HIT Power N Series. The cells are hybrids of monocrystalline silicone, surrounded by ultr...
Forum Discussion
You need to apply the First Law of Thermodynamics. Energy remains constant. The MPPT controller is a smart controller. It can decide where on the PV IV curve it should operate at. This controller is told to operate at the maximum power point. The controller is capable of going anywhere on the IV curve in the hunt for max power.
If it finds max power at 36V, then Imp = 220W/36V = 6.1A.
If it finds max power at 39V, then Imp = 220W/39V = 5.64A
Now we get back to the First Law of Thermodynamics. Input power to the converter is 220W. If the converter is 100% efficient, then output power must also be 220W.
If the battery is at 12.5V, then charging current must be:
Icharge = 220W / 12.5V = 17.6A
Sal
If it finds max power at 36V, then Imp = 220W/36V = 6.1A.
If it finds max power at 39V, then Imp = 220W/39V = 5.64A
Now we get back to the First Law of Thermodynamics. Input power to the converter is 220W. If the converter is 100% efficient, then output power must also be 220W.
If the battery is at 12.5V, then charging current must be:
Icharge = 220W / 12.5V = 17.6A
Sal
BFL13 wrote:
If so, which gets more amps to the battery bank at 13v--220w and 36v or 220w and 39v?
