richie241
Member
- Joined
- Nov 6, 2018
- Messages
- 34
Hi all,
my powerwall buildis approaching and i have some questions aboutit.
After a half year of recycle & testing 2000+ cells, i sold allrecycled stuff because im going
to do my build with new cells -from a long view it is the best for my case (not the cheapest.. ;-) )
Key data for my build:
- Cells: LG INR18650-M36
- SolaX Hybrid SK-SU3700E G2
- Batrium BMS
I tested someLG INR18650-M36 and im going to use them from 4.05V - 3.20V.
By 500mA discharge the capacity is round about 2500mA.
I choose this cell because they have a good cycle lifeAccording to the data sheet:
charge 0.2C1A to 4.10V, discharge 0.5C 1.675A to 2.85V
after 1000 cycles 80%capacity
I will charge/discharge with max 500mA per cell (when build iscomplete ~300mA)
I start with a 14S 40P configuration what is 5.1kWh in my case.
After this setup is working well i will expand the packs by adding 40,80 or 120 new cells to each pack.
Goal is max 20kWh (400A) = 14S 160P in this setup.
Would you recommend it that way? I think with all new cells this should not be a problem..?
I read a lot about the cell fusing.. im not sure what to use for my build.
Maybe Glas fuses with 1.5A? What Mainfuse should i use?
LG INR18650-M36 has 5A max discharge,SolaX Hybrid SK-SU3700E max 50A charge/discharge
sunny greetings
Richie
my powerwall buildis approaching and i have some questions aboutit.
After a half year of recycle & testing 2000+ cells, i sold allrecycled stuff because im going
to do my build with new cells -from a long view it is the best for my case (not the cheapest.. ;-) )
Key data for my build:
- Cells: LG INR18650-M36
- SolaX Hybrid SK-SU3700E G2
- Batrium BMS
I tested someLG INR18650-M36 and im going to use them from 4.05V - 3.20V.
By 500mA discharge the capacity is round about 2500mA.
I choose this cell because they have a good cycle lifeAccording to the data sheet:
charge 0.2C1A to 4.10V, discharge 0.5C 1.675A to 2.85V
after 1000 cycles 80%capacity
I will charge/discharge with max 500mA per cell (when build iscomplete ~300mA)
I start with a 14S 40P configuration what is 5.1kWh in my case.
After this setup is working well i will expand the packs by adding 40,80 or 120 new cells to each pack.
Goal is max 20kWh (400A) = 14S 160P in this setup.
Would you recommend it that way? I think with all new cells this should not be a problem..?
I read a lot about the cell fusing.. im not sure what to use for my build.
Maybe Glas fuses with 1.5A? What Mainfuse should i use?
LG INR18650-M36 has 5A max discharge,SolaX Hybrid SK-SU3700E max 50A charge/discharge
sunny greetings
Richie