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Lead-Acid vs Lithium-Inverter Battery
A side-by-side comparison of lead-acid and lithium-ion (LFP) inverter batteries at matched capacity, with an honest look at where each chemistry is stronger.
| Specification | Lead-Acid (Tubular) | Lithium-Ion (LFP) |
|---|---|---|
| Upfront cost | Lower per Ah | Higher per kWh |
| Usable depth of discharge | ~50% | Higher (stated per model) |
| Cycle life | [TO BE CONFIRMED] | [TO BE CONFIRMED] |
| Weight | Heavier | Lighter |
| Maintenance | Periodic water topping | Maintenance-free |
| Safety chemistry | Lead-acid | LiFePO4 (LFP) |
Where we are stronger
- •Lead-acid batteries have a lower upfront cost per Ah, which matters when budget is the main constraint.
Where the competitor is stronger
- •LFP batteries generally deliver more cycles and higher usable depth of discharge, so over a long daily-cycling life they can be cheaper per delivered cycle.
Who should choose which
Choose lead-acid if upfront budget is the priority and daily deep cycling is not required. Choose lithium (LFP) if you cycle daily, want maintenance-free operation, and can accept the higher upfront cost.