![]() Don’t be fooled – the marketing may claim ‘10 years’ but look deeper, and they can be as short as 13 months if you discharge them ‘too much’.Ī good, reasonably-priced battery will generally have a 10-year warranty that allows you to at least cycle it once per day for ten years with a guarantee of 70% capacity after ten years.Īs we move to morning and evening peak pricing, I recommend looking for warranties that allow 2 cycles per day for the warranty period so you can charge from solar panels during the day, discharge in the evening peak, and charge from overnight off-peak and discharge in the early morning peak. Battery Cost Factor #3 WarrantyĬheaper batteries generally have shorter warranties. Nerd Fact: The third generation of Tesla’s Powerwall has moved to LFP to reduce costs. LFP is about 20% cheaper than NMC in 2023.
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