ROCKSOLAR 12V 18Ah Deep Cycle Lithium Battery (LIFEPO4)
Pickup available at USA Fulfillment Center
Usually ready in 24 hours
Talk to Real Experts Anytime
Talk to Real Experts Anytime
Lifetime tech support from our in-house specialists
Hassle Free Warranty
Hassle Free Warranty
Effortless Warranty for Your Ease.
Unbeatable Value, Guaranteed
Unbeatable Value, Guaranteed
Find it cheaper elsewhere? We'll match it.
Speak To a Solar Specialist
ROCKSOLAR 12V 18Ah Deep Cycle Lithium Battery (LIFEPO4)
solar industry experience
10,000+ American
customers
return policy
Warranty
What it is, and what it is for
ROCKSOLAR 12V 18Ah Deep Cycle LiFePO4 Battery
A rechargeable lithium iron phosphate battery with a built-in BMS, nominal voltage of 12.8 V and nominal capacity of 18 Ah.
- Cycle life: At least 3,000 cycles at 100% DoD, tested at 0.5C discharge to 70% of initial capacity.
- Current ratings: 5 A standard charge; recommended charge ≤20 A, maximum charge 20 A. Standard discharge 5 A; recommended discharge ≤20 A, maximum discharge 30 A.
- Peak current: 50 A for 10 seconds; not a continuous rating.
- Charging voltage: 14.6 ± 0.2 V; use a compatible LiFePO4 charger with the appropriate current setting.
- Operating temperatures: Charge 0°C to 45°C; discharge −20°C to 60°C.
- Long-term storage: 30–50% state of charge; recharge every six months while unused.
- Weight: Approximately 2.1 kg.
- Warranty: 3 years.
Nominal and Estimated Usable Energy
Nominal energy: 230.4 Wh (0.2304 kWh), based on 12.8 V × 18 Ah. Estimated usable energy: 218.88 Wh (0.21888 kWh), calculated at 95% of nominal energy under ROCKSOLAR's catalog standard. This is an estimate, not a manufacturer-stated usable-capacity rating. Actual delivered energy depends on operating conditions and any conversion losses.
1 component
Each one is a product we sell on its own, so you can read its full listing, and replace or add to it later.
Every number, by component.
The figures the manufacturer publishes. The datasheet above is the reference if the two ever differ.
| Model | LP12-18 |
|---|---|
| Nominal voltage / capacity | 12.8 V / 18 Ah |
| Cycle life | At least 3,000 cycles at 100% DoD, tested at 0.5C discharge to 70% of initial capacity. |
| Current ratings | 5 A standard charge; recommended charge ≤20 A, maximum charge 20 A. Standard discharge 5 A; recommended discharge ≤20 A, maximum discharge 30 A. |
| Peak current | 50 A for 10 seconds |
| Charge voltage | 14.6 ± 0.2 V |
| Operating temperatures | Charge 0°C to 45°C; discharge −20°C to 60°C |
| Long-term storage | 30–50% SOC; recharge every six months while unused |
| Weight | Approximately 2.1 kg |
| Warranty | 3 years |
Nominal and Estimated Usable Energy
Nominal energy: 230.4 Wh (0.2304 kWh), based on 12.8 V × 18 Ah. Estimated usable energy: 218.88 Wh (0.21888 kWh), calculated at 95% of nominal energy under ROCKSOLAR's catalog standard. This is an estimate, not a manufacturer-stated usable-capacity rating. Actual delivered energy depends on operating conditions and any conversion losses.
Before you order.
If yours isn't here, ask an engineer. It costs nothing and it's the step most people skip.
What if I'm not sure this is the right product?
Ask before you order. Send us what you need to run, or your pool or well figures, and an engineer will confirm the choice — it costs nothing. Or use the finder below, which sizes from what you actually run and shows its reasoning.
Read it all? Add it to your cart.
Same price and options as at the top of the page. Shipping is worked out at checkout from your address.
