Hi, I am not new to solar power and have been using it hassle free since 2009. I have multiple arrays that have been excellent, and under the right environmental conditions will reach their rated maximum. However, my query is related the latest MMPT controller that I have purchased; an Epever Tracer 8415AN which is rated at 80amp 150v with the ability to be powered by a 50% oversized array.
I have 25 amp wire running from the series panels, (10 amps each group in series) to the bus bar. From the Bus Bar there is a 4m run of wire to the controller, which is 79 amp cable. From the controller there is < 2m of 225 amp cable to the battery bank.
BUT if solar array of ten 260 watt x 38 volt panels (5x2 in series then, parallel) is producing >50 amps at 60v and the inverter is using 1.8kw,
Question 1. why does the MMPT solar charge controller not produce its maximum output of 80 amps? It produces about 54 amps after MMPT conversion. Why does the controller not try to keep up with the demand at the 1.8kw inverter?
Question 2. Why if I increase the draw to 3.8kw from the inverter, does the controller then increase output to about 73amps, bearing in mind that the array is producing 100 amps.
Hopefully I have given you sufficient info to answer the questions. Personally I think the controller is faulty, but trying to convince the seller of that is a real challenge.
I have 25 amp wire running from the series panels, (10 amps each group in series) to the bus bar. From the Bus Bar there is a 4m run of wire to the controller, which is 79 amp cable. From the controller there is < 2m of 225 amp cable to the battery bank.
BUT if solar array of ten 260 watt x 38 volt panels (5x2 in series then, parallel) is producing >50 amps at 60v and the inverter is using 1.8kw,
Question 1. why does the MMPT solar charge controller not produce its maximum output of 80 amps? It produces about 54 amps after MMPT conversion. Why does the controller not try to keep up with the demand at the 1.8kw inverter?
Question 2. Why if I increase the draw to 3.8kw from the inverter, does the controller then increase output to about 73amps, bearing in mind that the array is producing 100 amps.
Hopefully I have given you sufficient info to answer the questions. Personally I think the controller is faulty, but trying to convince the seller of that is a real challenge.