Casil 12V 50Ah LiFePO4 Lithium Battery, Built-in BMS, Replaces 55AH 100AH Battery Perfect for RV, Solar, Marine, Home Energy storage, and Off Grid Applications - 4000+ Deep Cycles
- In stock · Order by 3 PM ET, ships same business day from our US warehouse
- Free shipping on this battery · Shipping details
- Built-in BMS — protects against overcharge, over-discharge and short circuits
- 1-year pro-rated warrantyTerms on every listing
- Free shippingOn most batteries
- Ships from US warehousePacked and shipped from US stock
- Fresh, date-coded stockEvery battery date-stamped
- Talk to a person973-500-6828
- Secure checkoutEncrypted, PCI-compliant payments
- Nominal voltage
- 12V
- Capacity
- 50Ah
- Cycle life
- 4,000+
- BMS
- Built-in
- Size (in)
- 8.98 × 5.43 × 8.19
Replacing an AGM? Check your setup
Overview
A lighter, longer-lasting 12V 50Ah battery
The Casil 12V 50Ah LiFePO4 Lithium Battery is a high-quality power source that is designed to provide reliable and long-lasting power for a wide range of applications. With a capacity of 50Ah and a voltage of 12V, this battery is a perfect replacement for 55AH and 100AH batteries. It is a great choice for RVs, solar systems, marine applications, home energy storage, and off-grid applications.
One of the key features of this battery is its use of lithium iron phosphate (LiFePO4) technology. This technology is known for its safety, stability, and durability, making it a reliable and secure power source. The Casil 12V 50Ah LiFePO4 Lithium Battery is capable of providing over 4000 deep cycles, which means it is a cost-effective solution for anyone who needs a long-lasting power source.
Another key feature of this battery is its built-in Battery Management System (BMS). This system monitors the battery's performance and protects it from overcharging, over-discharging, and short circuits. This ensures that the battery remains safe to use and extends its overall lifespan.
The Casil 12V 50Ah LiFePO4 Lithium Battery is also lightweight and compact, making it easy to transport and install. It is designed to be compatible with a wide range of devices and systems, and can be used in a variety of different environments.
Overall, the Casil 12V 50Ah LiFePO4 Lithium Battery is a top-quality power source that offers a range of benefits, including reliability, durability, safety, and compatibility. Whether you need a battery for RVs, solar systems, marine applications, home energy storage, or off-grid applications, this battery is an excellent choice.
- Lithium iron phosphate (LiFePO4)A stable, long-life chemistry with a built-in battery management system.
- 4,000+ rated cyclesBuilt for daily charge and discharge in solar, RV and marine use.
- Maintenance-freeNo watering, no venting, no acid.
- Standard case size8.98 × 5.43 × 8.19 in.
- Fresh, date-coded stockMonth and year printed on the label for your service records.
LiFePO4 vs AGM
Same job. A fraction of the weight.
LiFePO4 holds its voltage almost to empty, so lights stay bright and inverters keep running until the battery is nearly drained, and it is rated for 4,000+ cycles.
- Rated cycles
- 4,000+
Battery management system
The built-in BMS does the babysitting
It watches the cells and disconnects the battery before damage happens.
- OverchargeStops charging when the cells are full.
- Over-dischargeCuts off before the cells are drained too far.
- Short circuitDisconnects on a short across the terminals.
Applications
Built for life off the grid
One battery for the places where a dead battery means a cold night or a long paddle home.
Capacity options
Pick the size of your bank
Same 12V LiFePO4 chemistry in other capacities.
Specifications
Full specifications
| Model | Casil LFP 12V 50Ah |
|---|---|
| Brand | Casil |
| SKU | 1x LFP12.8V50AH-001-1X |
| UPC | 3.05E+11 |
| Nominal voltage | 12V |
| Rated capacity | 50Ah |
| Chemistry | Lithium iron phosphate (LiFePO4) |
| Length × width × height | 8.98 × 5.43 × 8.19 in (228 × 138 × 208 mm) |
| Cycle life | 4,000+ cycles (rated) |
| Battery management | Built-in BMS |
| Maintenance | Maintenance-free |
| Used in | Lithium LiFePO4, Mobility Scooters & Wheelchairs, Solar, Marine & RV |
| Shipping | Free shipping · ships from our US warehouse |
Dimensions
Dimension drawing
Drawn to scale from the listed dimensions. Terminal positions are shown for reference — check the polarity marks on your old battery.
Compatibility
Where it’s used
Used in Lithium LiFePO4, Mobility Scooters & Wheelchairs, Solar, Marine & RV. Match voltage (12V), capacity (50Ah), size and terminal to the battery you are replacing.
Shipping & warranty
Shipping, returns & warranty
Shipping
Free shipping on this battery. Order by 3 PM ET and it ships the same business day from our US warehouse.
Shipping detailsReturns
Ordered the wrong size? Check the return window and how to send a battery back before you ship it.
Returns policyWarranty
Keep your order number — the date code on the label shows when the battery was made.
Warranty termsBuying 25 or more?
Get a written quote with business pricing for installers, facilities and resellers.
Request a quoteFAQ
Lithium questions
Planning a bigger bank or a 24V system? Our team can help you size it.
Can I swap my AGM for this without other changes?
In most 12V systems, yes — as long as it fits the space (8.98 × 5.43 × 8.19 in). The one change is charging: set your charger, converter or solar controller to its LiFePO4 (lithium) profile, because AGM settings will not fully charge it.
Do I need a lithium charger?
Use a charger or controller with a LiFePO4 or lithium setting. Many modern chargers, converters and solar controllers have one. A lead-acid charger with a desulfation or equalize mode should not be used.
Can I connect batteries in series or parallel?
Use identical batteries of the same age and charge level, and check the series and parallel limits for this model with our team before you build a bank. Call 973-500-6828.
Can it be charged below freezing?
LiFePO4 batteries should not be charged below 32°F (0°C) unless they have low-temperature charge protection. Discharging in the cold is fine. Ask us about cold-weather setups for this model.
How does it ship?
Shipping is free on this battery. Orders placed by 3 PM ET ship the same business day from our US warehouse. See shipping details.
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