Answer
Jan 06, 2024 - 07:48 AM
Your total PV power is 2 x 180 = 360 Watts and the MPPT 100/50 is capable of handling up to 700 Watts in a 12 volt system so this MPPT is a bit overkill for your situation. You would be better off using the MPPT 100/30 which can handle up to 440 Watt
Regardless of which MPPT you choose the last digits in the part number represent the max number of amps it will put out. The 100/30 can put out 30 amps and the 100/50 can put out 50 amps. You need circuit protection where this connects to the battery. You want the circuit protection to be a higher value than the expected current because otherwise it would be constantly on the point of blowing and would heat up. For the 100/30 you could use a 40 amp fuse or circuit breaker, for the 100/50 you could use something in the range of 60-75 amps.
Regardless of which MPPT you choose the last digits in the part number represent the max number of amps it will put out. The 100/30 can put out 30 amps and the 100/50 can put out 50 amps. You need circuit protection where this connects to the battery. You want the circuit protection to be a higher value than the expected current because otherwise it would be constantly on the point of blowing and would heat up. For the 100/30 you could use a 40 amp fuse or circuit breaker, for the 100/50 you could use something in the range of 60-75 amps.
