Multiple Jakiper batteries -- higher charge/discharge limits?

rvdbijl · Jan 12, 2023

Hi Everyone,

Newbie here -- when it comes to battery storage and inverters. So far I've only done grid-tied Enphase.
Hopefully a simple question --
I'm buying a Sol-Ark 8k and 4 Jakiper Pro 100Ah 48V LiFePo4 batteries. The Jakiper batteries show a max. of 100A discharge current -- with 4 in parallel, does this increase to 400A? Or is it still limited to 100A?

Joehebbo · Jan 15, 2023

rvdbijl said:
Hi Everyone,

Newbie here -- when it comes to battery storage and inverters. So far I've only done grid-tied Enphase.
Hopefully a simple question --
I'm buying a Sol-Ark 8k and 4 Jakiper Pro 100Ah 48V LiFePo4 batteries. The Jakiper batteries show a max. of 100A discharge current -- with 4 in parallel, does this increase to 400A? Or is it still limited to 100A?

Should b 400 ah bcz in parallel will be all as one

rvdbijl · Jan 17, 2023

Joehebbo said:
Should b 400 ah bcz in parallel will be all as one

Thanks! I know with normal batteries (without BMS, like a simple lead acid) that was the case, just wanted to make sure it's the same with these "intelligent" LiFePO4 batteries.

Joehebbo · Jan 17, 2023

rvdbijl said:
Thanks! I know with normal batteries (without BMS, like a simple lead acid) that was the case, just wanted to make sure it's the same with these "intelligent" LiFePO4 batteries.

You got your answer? Bcz i made same question max charge and discharge what should be ? Still no direct answer

SeaGal · Jan 17, 2023

rvdbijl said:
Hi Everyone,

Newbie here -- when it comes to battery storage and inverters. So far I've only done grid-tied Enphase.
Hopefully a simple question --
I'm buying a Sol-Ark 8k and 4 Jakiper Pro 100Ah 48V LiFePo4 batteries. The Jakiper batteries show a max. of 100A discharge current -- with 4 in parallel, does this increase to 400A? Or is it still limited to 100A?

In theory.. yes... BUT...

a) 100A discharge of a 100Ah battery is a 1C discharge rate. This will have an impact on LiFePO4 longevity. I am surprised Jakiper quote a 1C max rate - many other suppliers quote a 0.5C max rate.

b) A 1C discharge should only be considered if the battery is at an optimal temperature (e.g. 25 to 35 degrees C).

c) Your inverter may not support a discharge rate of 400A. That would equate to around 20kW. I am guessing a Sol-Ark 8k is only 8kW?

Joehebbo · Jan 18, 2023

SeaGal said:
In theory.. yes... BUT...

a) 100A discharge of a 100Ah battery is a 1C discharge rate. This will have an impact on LiFePO4 longevity. I am surprised Jakiper quote a 1C max rate - many other suppliers quote a 0.5C max rate.

b) A 1C discharge should only be considered if the battery is at an optimal temperature (e.g. 25 to 35 degrees C).

c) Your inverter may not support a discharge rate of 400A. That would equate to around 20kW. I am guessing a Sol-Ark 8k is only 8kW?

If i have a pack of 4 of 100 rack can t also put 100 discharge same as if it was 1 of 100

SeaGal · Jan 19, 2023

Joehebbo said:
If i have a pack of 4 of 100 rack can t also put 100 discharge same as if it was 1 of 100

Sorry, I don't understand your question? En francais, peut-etre si votre anglais n'est pas bon?

Joehebbo · Jan 19, 2023

SeaGal said:
Sorry, I don't understand your question? En francais, peut-etre si votre anglais n'est pas bon?

Mon anglais est parfait monsieur , c toi qui sais pas l anglais mdr…j aissayera en francais … ca fait longtemps j ai pas ecris en francais…je pose la question si quelq1 a 4 battery lithium 4x 100ah en parallel c a dire 400 ah de 48 v combien doit etres le maximum de charge et discharge pour les battery c calculer comme une seul battery de 400ah ou non rest calcule comme 100 ah c tout

SeaGal · Jan 19, 2023

OK... 4 x 100Ah in parallel is same as 1 x 400Ah for the purpose of charging, assuming your wiring is correct and equal to each battery pack.

So, if you charge at (say) 100A, that will be a charge rate of 0.25C across 4 x 100Ah batteries in parallel.

rvdbijl · Jan 21, 2023

SeaGal said:
In theory.. yes... BUT...

a) 100A discharge of a 100Ah battery is a 1C discharge rate. This will have an impact on LiFePO4 longevity. I am surprised Jakiper quote a 1C max rate - many other suppliers quote a 0.5C max rate.

b) A 1C discharge should only be considered if the battery is at an optimal temperature (e.g. 25 to 35 degrees C).

c) Your inverter may not support a discharge rate of 400A. That would equate to around 20kW. I am guessing a Sol-Ark 8k is only 8kW?

Certainly I don't ever intend to get close to 400A current. And yes, the Sol-Ark will top out around 8kW. My normal load on the circuit that will be connected to that inverter is around 1-2kW, but sometimes it will peak to 5-6kW if the well pump kicks on. 5-6 kW is a bit more than 100A, which is why I wanted to make sure the battery bank wouldn't shut down if that happened. Sounds like it should be fine!

Joehebbo · Jan 22, 2023

SeaGal said:
OK... 4 x 100Ah in parallel is same as 1 x 400Ah for the purpose of charging, assuming your wiring is correct and equal to each battery pack.

So, if you charge at (say) 100A, that will be a charge rate of 0.25C across 4 x 100Ah batteries in parallel.

Should i go more like 0.50c charge and discharge ? Yeah i am using buss bar and all wires same length and 25 mm thickness with a breaker of 125 a and on each batt has her own breaker but i want to see how much i can max charge and discharge and stay in safe zone

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