What needs to be added here?

[dmw520]

Renting a double wide with a solar set-up.
16 100Ah LifeP04 (ampertine) batteries (8batts =1 bank, 8 =the other bank)
1 5kw (10kw max) inverter
1 4kw inverter
2 MPPT charge controllers
This is a 12v system.
All panels are wired in series and parallel.
Unsure the specs for the panels. They might be 12 240-300w panels.
••So my questions are about what should be added to the system to make it more efficient and safe?
•Would it be better to run on a 24 or 48v configuration?
•Can't all of the batteries just be connected into a single array aka bank?
•Not needing two inverters?
•Does it need another inverter?
>that stupid jupiter inverter can't seem to hold up, it was replaced about a WK ago and now this one is making the same sound and just not working. No reset switch or button. Same amount of batteries connected and it won't even work while the 4kw inverter is doing just fine. This system is running the house maybe 200w-450w are drawing during sleeping and no one being home.
I will appreciate any and all help.
I'm seeking assistance bc I know not what I do in this field. All I can think about is safety measures I've already added an ABC fire extinguisher 3' away. I'm only used to working on simple 1 12 batteries in vehicles adding inline fuses and what not but this, this is awesome but can be a little more involved. I'm willing to learn though bc I kinda love it.
•••
All batteries connections made with single or double O wiring.
No circuit breakers, no fuses, no safety cut offs. Kind of paranoid.

 

[Bobert]

If you are renting and this setup came with the place. Technically it is your landlord’s responsibility. From what I am seeing it looks like the system is not fused properly or wired correctly. You obviously already have performance issues. Your landlord may have inherited this problem. You need to work with him / her to get it resolved. A Fire extinguisher is a good idea but probably not enough. I wouldn’t be comfortable with this setup either.

 

[SamDeleted]

What a mess lol !


I'm trying to figure out who would spend that much on money 16 LiFePo4 batteries , (it's got to be a few $1000s worth) and then hook them up THAT badly and run off cheapo junk inverters & MPPTs .... and no fuses ??? Crazy

No circuit breakers, no fuses, no safety cut offs. Kind of paranoid.

It's not paranoia if they're really out to get you.

There some good equipment there but really it needs a full rewire , preferably by someone who knows a what they're doing! As it stands thats a dangerous system

 

[SamDeleted]

I'm trying to figure out who would spend that much on money 16 LiFePo4 batteries , (it's got to be a few $1000s worth) and then hook them up THAT badly and run off cheapo junk inverters & MPPTs .... and no fuses ??? Crazy

What a tosser .

 

[Shimmy]

One big question is what are your loads?

You need a PV isolator switch and battery circuit breakers for the inverters and charge controllers. 48V would increase your inverter options, but require a significant re-work.

 

[dmw520]

What options would switching over to a 48v set-up give me?

 

[dmw520]

What a mess lol !


I'm trying to figure out who would spend that much on money 16 LiFePo4 batteries , (it's got to be a few $1000s worth) and then hook them up THAT badly and run off cheapo junk inverters & MPPTs .... and no fuses ??? Crazy




It's not paranoia if they're really out to get you.

There some good equipment there but really it needs a full rewire , preferably by someone who knows a what they're doing! As it stands thats a dangerous system

LiTime 12V 100Ah LiFePO4 Battery Built-in 100A BMS, Up to 15000 Cycles, Perfect for RV, Marine, Home Energy Storage https://a.co/d/70tByFC

$349.99 / batt. X 18 = $6,299.82 (not including shipping or tax). About 13 panels, wiring (300' or so)

 

[SamDeleted]

What options would switching over to a 48v set-up give me?

48v , you can get bigger inverters , cables are smaller as amps are lower

Up to 15000 Cycles

UP TO being the key words here lol !

LiTime 12V 100Ah LiFePO4 Battery Built-in 100A BMS, Up to 15000 Cycles, Perfect for RV, Marine, Home Energy Storage https://a.co/d/70tByFC

$349.99 / batt. X 18 = $6,299.82 (not including shipping or tax). About 13 panels, wiring (300' or so)

Are these suitable for wiring in series , not all LiFePo4 12v batteries are .

 

[Shimmy]

What options would switching over to a 48v set-up give me?

The industry is switching to 48V, or at least away from 12V and 24V for the reasons @SamG340 states, along with the fact that a 48V battery can more efficiently be boosted to 120-240V. The downside of 48V is that you generally need a higher PV string voltage for the MPPT controls, so for a very small system (<800W) it might not work well.

"Strategically" 48V also gives you options on how you repurpose equipment down the road. A 3kW, 120V inverter today might be something you use as a critical loads panel inverter or emergency inverter in the future.

Another nice benefit of a 48V system is you can still step down power to 12V if you need it for anything with a simple converter... or several.