A CALB 6S2P lithium iron phosphate battery module, 2.2 kWh, brand new in the box with a twelve month warranty.
LFP chemistry is the reason to choose this over a salvaged automotive module. Lithium iron phosphate gives up some energy density and gets back a great deal of tolerance: it is markedly more stable thermally than NMC, it takes a long cycle life, and it is far more forgiving of the imperfect charging and the wide temperature swings a home built pack actually sees. For stationary storage and off grid work, that trade is almost always the right one.
It is new, with a warranty. Most modules in this market are pulled from vehicles with unknown history. These are not, which matters when you are building something that has to be predictable rather than merely cheap.
6S2P means six cell groups in series, two cells in parallel per group. Your BMS needs six cell taps per module, not twelve: parallel cells are one cell as far as monitoring is concerned.
Key specifications
| Part | CALB22KWH6S2P |
|---|---|
| Chemistry | Lithium iron phosphate, LiFePO4 |
| Configuration | 6S2P, six series groups of two |
| Energy | 2.2 kWh |
| Cell taps required | 6 per module |
| Condition | Brand new in box |
| Warranty | 12 months |
Features
- LFP chemistry, which is more thermally stable and longer lived than NMC
- Brand new with a twelve month warranty, not salvage of unknown history
- Modular and scalable, so a pack is built by repeating one known quantity
- Stable discharge and consistent behaviour across the pack
Compatibility
For EV conversions, renewable energy storage and off grid power.
It needs a BMS. The module has no protection of its own. Every cell group needs monitoring and balancing, and LFP in particular has a very flat voltage curve, which makes accurate cell level measurement more important rather than less.
Check the busbar you need. Module busbars are specific to the module, and CALB modules of nearly identical name differ in spacing. Our right angle busbar fits the 2.2 kWh CALB modules, which is this one, and not the 2.35 or 2.55 kWh variants.
In the box
- 1 x CALB 6S2P battery module, 2.2 kWh
Downloads
The CALB module specification sheet is in the Documents tab.



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