48 v battery bank, 3- 100amp/100volt mppt charge controllers. 6 bi-facial 550 watt panels at 49.92 voc and 13.99 scc. Looking for the best way to do the panels. The 48v inverter can handle up to 54.5 volts. Series only or a mixture. Thanks in advance
Series and parallels
- Thread starter tpete9312
- Start date
murmeister
Lifetime Learner
Are you sure about the specs on your inverter? Only 54.4 volts input on the MPPT? Also, how many strings can connect to your inverter and what is the max amps limit per string?
murmeister
Lifetime Learner
Sorry, I just read your message again. I have AIO (all in one) on my brain.
Osmethne
Solar Enthusiast
That's a very odd limitation. Definitely would want to double check that.
Personally I would avoid parallel if at all possible because you have to add fuses to protect the panels.
Personally I would avoid parallel if at all possible because you have to add fuses to protect the panels.
54.4 volts is when the red light and beep starts on inverter for over voltage. The charge controllers can take up to 192v. 48volt battery bank consists of 4 100ah 12v batteries. Don't want to charge batteries to fast. According to the battery charge refrance sheet is to not exceed 20 amps per battery. Trying to maximize the panels. Have them all in series now 2 per controller. Getting 54.5 volts and up to 18 amps on all 3 controllers. Just think it should be doing more amps
3 strings and can't exceed 80 amps total
I am well confused now 
. Can you draw us a diagram? Not sure if you have one or three battery packs (one shared or one for each controller). What chemistry battery are you using and why do you say you can't exceed 80Amps yet also say don't want to exceed 20A per battery
. Can you draw us a diagram? Not sure if you have one or three battery packs (one shared or one for each controller). What chemistry battery are you using and why do you say you can't exceed 80Amps yet also say don't want to exceed 20A per battery 
MXMOONFREE pure sine 5k input dc48v output 110-120 v
4 12v 100ah batteries in series to 48vI am well confused now
42OhmsPA
What's in a title?
This? 60V max....
Any reason you didn't go with an AIO for about the same price?
Are they returnable? Are they LiFePo4? It is frowned upon to run them in series. I would definitely add a balancer if you don't change to a 48V pack.
What charge controllers?
Welcome to the forum.
littleharbor2
Solar Addict
2 panels in parallel into each of the MPPT's
