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
BFL,
With 24-volt panels it's all about the watts. The Rogue controller is about 95% to 97% efficient and I expect other quality MPPT controllers are about the same. This means that if the array is producing 400 watts, the controller will output 380 to 390 watts. Assuming the SOC is such that the batteries an accept all of it, the instantaneous amperage is proportional to the instantaneous voltage with respect to the output wattage. This means that if the controller is charging the batteries at 13.6 volts, the amperage is somewhere between 27.9 and 28.7. No magic.
With 24-volt panels it's all about the watts. The Rogue controller is about 95% to 97% efficient and I expect other quality MPPT controllers are about the same. This means that if the array is producing 400 watts, the controller will output 380 to 390 watts. Assuming the SOC is such that the batteries an accept all of it, the instantaneous amperage is proportional to the instantaneous voltage with respect to the output wattage. This means that if the controller is charging the batteries at 13.6 volts, the amperage is somewhere between 27.9 and 28.7. No magic.
