Lifepo4 for stationary storage makes so much more sense vs NMC.
- Lower cost / kWh
- No need for Cobalt (and its controversial extraction)
- Better for the environment (from my basic understanding the materials are easier to obtain and less damaging)
- Longer cycle life (~5K vs 2K)
- No thermal runaway and less risk of catching fire
The main downside is that LFP batteries are heavier per kWh, but that should mostly be a non-issue for stationary storage.
The price of LFP batteries is dropping so fast. Consumers can buy a fully assembled LFP 12V 1300Wh battery for $399 on amazon [0]. Raw cells can be bought for 3-4x less from Chinese distributors.