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MPPT LV6048 x 2 but used independently, config questions

Jazzmonger

Hacker at heart
Joined
Apr 29, 2022
Messages
157
Location
Wilder, Idaho
New install... I just got the equipment today.
I have 2 LV6048 inverter/charge controllers and 4x100ah LifePO4 48v batteries. And 24 420w panels with two 6x2 combiners.

https://watts247.com/manuals/mpp/LV6048 split phase manual-20201120.pdf

I am powering them with a 100A sub panel w 40 breakers to the inverters, and using them for independent feeds, one feeds a 50A sub panel in my house, the other goes to a 50A sub panel in my shop. They will both be connected to the 4 batteries. Each inverter will be fed by an array of 12 panels in 2S6P configuration. So 24 panels total.

my questions are:

do I even need to use the parallel interconnects between these inverters and if so, what advantage does this provide?
If I'm not paralleling the outputs of the inverters but rather keeping them independent, I presume the charge controllers should act independently.

also, is two arrays of 2S6P the best configuration? The panels are on a south facing slanted roof with no obstructions From 10am-4pm all day.

An alternative config I've considered is paralleling the outputs in 180degree configuration, providing 240v @100A in total, and then running 240v 50A circuits to each of the sub panels.

so many choices to make...

Jeff
 
New install... I just got the equipment today.
I have 2 LV6048 inverter/charge controllers and 4x100ah LifePO4 48v batteries. And 24 420w panels with two 6x2 combiners.

https://watts247.com/manuals/mpp/LV6048 split phase manual-20201120.pdf

I am powering them with a 100A sub panel w 40 breakers to the inverters, and using them for independent feeds, one feeds a 50A sub panel in my house, the other goes to a 50A sub panel in my shop. They will both be connected to the 4 batteries. Each inverter will be fed by an array of 12 panels in 2S6P configuration. So 24 panels total.

my questions are:

do I even need to use the parallel interconnects between these inverters and if so, what advantage does this provide?
If I'm not paralleling the outputs of the inverters but rather keeping them independent, I presume the charge controllers should act independently.

also, is two arrays of 2S6P the best configuration? The panels are on a south facing slanted roof with no obstructions From 10am-4pm all day.

An alternative config I've considered is paralleling the outputs in 180degree configuration, providing 240v @100A in total, and then running 240v 50A circuits to each of the sub panels.

so many choices to make...

Jeff
Your inverters are basically staying fully separated except the inputs. Then you should be perfectly fine without paralleling the inverters. Each of the inverters charge controllers are using a separate array so the should be fine, although this is where paralleling the inverters might be helpful. I think I read that the charge controllers will work together when the inverters are paralleled, like master and slave. I’m not sure about how 2 charge controllers that are not paralleled work together properly, but again I’ve read many people doing it. Maybe one charge controller charges at a higher voltage than the other.
 
Last edited:
Interesting. I'm sort of leaning toward this config:

An alternative config I've considered is paralleling the outputs in 180degree configuration, providing 240v @100A in total, and then running 240v 50A circuits to each of the sub panels.

then, even if one unit failed, I still have the other to take over. Obviously I'd have a reduced load capacitym but conservative power management is something I'm absolutely used to.
 

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