Tweet
Hi,
My set up 4 x 100w panels in series to give me a 48v-60v charge, 30amp mppt to 4 x 100amph in series giving me 48v 100amph. From there I tap off 48v to a 3.6kw 220 inverter, also taping of the 48v side have a 36 V to 75 V input to 12v output. On the 12v I run 5amp freshwater pump, 5amp saltwater pump, small bulge pump and around 100w of LED lighting. On the 220AC side I run various woodwork tools and a few 100w spot lights. I have never tripped and my battery bank stays above 80% charge. Will be adding 200w freezer and a 80w TV soon as well as Navigation equipment to the 12v side. For this I am looking for a 48v alternator + alternator charge regulator to help out with the extra load. However I have researched and found to recharge the bank at max efficiency C/8 = 12.5amp so with a Alternator there will be wasted amps as the 48v alt is anything from 30amp more commonly 80amp up. So it seams all I need to do is add a few pannels to get to my 12.5 amp max charge. At the moment I get 5amp tops at noon. My question is, how to go about adding 2x100w panels to a 4 x 100w array and still keep it 48v. Is it ok to go 2 pare in parallel that gives me 12v and 12v and then 1 pare 12v in series = 24v, then connect the 3 groups in series 12 + 12 + 24 = 48v?
My set up 4 x 100w panels in series to give me a 48v-60v charge, 30amp mppt to 4 x 100amph in series giving me 48v 100amph. From there I tap off 48v to a 3.6kw 220 inverter, also taping of the 48v side have a 36 V to 75 V input to 12v output. On the 12v I run 5amp freshwater pump, 5amp saltwater pump, small bulge pump and around 100w of LED lighting. On the 220AC side I run various woodwork tools and a few 100w spot lights. I have never tripped and my battery bank stays above 80% charge. Will be adding 200w freezer and a 80w TV soon as well as Navigation equipment to the 12v side. For this I am looking for a 48v alternator + alternator charge regulator to help out with the extra load. However I have researched and found to recharge the bank at max efficiency C/8 = 12.5amp so with a Alternator there will be wasted amps as the 48v alt is anything from 30amp more commonly 80amp up. So it seams all I need to do is add a few pannels to get to my 12.5 amp max charge. At the moment I get 5amp tops at noon. My question is, how to go about adding 2x100w panels to a 4 x 100w array and still keep it 48v. Is it ok to go 2 pare in parallel that gives me 12v and 12v and then 1 pare 12v in series = 24v, then connect the 3 groups in series 12 + 12 + 24 = 48v?