Best LiFePO4 Battery Banks

The definitive guide to drop-in lithium iron phosphate batteries for RV, van life, cabin, and home off-grid systems.

Why LiFePO4?

Lithium iron phosphate (LiFePO4) batteries are the best choice for off-grid and RV use for several reasons:

Longest Cycle Life

3,000–5,000+ full cycles vs 300–500 for AGM. That's 8–15 years of daily use.

Non-Combustible

LiFePO4 chemistry won't vent toxic gases or catch fire, unlike NMC or lead-acid.

High Discharge Rate

1C continuous discharge (100A from a 100Ah battery) – handles inverters and power tools.

Cold Weather Warning: LiFePO4 batteries must not be charged below 32°F (0°C). If you're in a cold climate, make sure your battery has one of these:
  • A BMS with a working low-temperature charge cutoff
  • A 12V self-heating pad attached to the battery
  • A battery with a built-in heater (like RELiON InSight)
Mount the BMS temperature sensor near the bottom of the battery bank – that's where it's coldest.

12V Drop-In LiFePO4 Battery Comparison

All batteries below are 12V 100Ah (1,280 Wh) drop-in replacements unless noted. Prices are approximate; check current Amazon pricing.

Battery Capacity Price/Wh Warranty Key Features Buy
Battle Born 100Ah 1,280 Wh ~$0.74/Wh 10 years BMS & low-temp cutoff
Series-connectable (4S max)
1C discharge rate
Made in USA 		Amazon
Renogy 100Ah 1,280 Wh ~$0.70/Wh 5 years BMS & low-temp cutoff
Parallel only (no series)
1C discharge rate
Best value pick 		Amazon
RELiON RB100 1,280 Wh ~$0.82/Wh 7 years BMS & low-temp cutoff
Newer versions series-connectable
Internal heater available
1C discharge rate 		Link soon
Simpliphi PHI 1.4 1,352 Wh ~$1.14/Wh 5 years C2.5 discharge only (slower)
Slightly larger capacity
Higher price/Wh 		Link soon
Kilovault 1800 HLX 1,800 Wh ~$0.72/Wh 10 years BMS & low-temp cutoff
Series & parallel (4S4P max)
1.1C discharge rate
Largest capacity at this price/Wh 		Link soon
DIY – 4× raw cells + BMS ~1,100–1,500 Wh ~$0.22/Wh None Lowest cost per Wh
No warranty, requires research
Up to 3C discharge available
Requires a quality BMS ($150+) with low-temp protection 		Learn More

Disclosure: Amazon links are affiliate links. We may earn a commission at no extra cost to you.

Detailed Reviews

Battle Born 100Ah LiFePO4
Battle Born 100Ah

The most popular LiFePO4 battery in the US vanlife and RV community. Made in Reno, NV with a 10-year warranty. Handles 4S configurations for 24V/48V systems.

~$949 • $0.74/Wh

View on Amazon
Renogy 100Ah LiFePO4
Renogy 100Ah

Best value LiFePO4 for 12V systems. Can only be wired in parallel (not series), so stick to 12V systems. 5-year warranty and excellent customer support.

~$899 • $0.70/Wh

View on Amazon
RELiON RB100
RELiON RB100

Great battery for cold climates – available with built-in heater (InSight series). Newer versions are series-connectable. 7-year warranty.

~$1,050 • $0.82/Wh

Amazon link coming soon
Kilovault 1800 HLX
Kilovault 1800 HLX

The highest capacity 12V drop-in at this price point. 1,800 Wh per unit with 4S4P capability and a 10-year warranty.

~$1,296 • $0.72/Wh

Amazon link coming soon

DIY Raw Cell Option

If you're comfortable with basic electronics, buying raw prismatic LiFePO4 cells from reputable suppliers (EVE, CATL, Lishen) and building your own battery pack can cost as low as $0.20–$0.25/Wh – a fraction of drop-in battery prices.

DIY requirements:
  • A quality BMS ($150+) from JK BMS, Overkill Solar, or Daly with proven low-temperature protection
  • Cell-level fusing (nickel or copper bus bars, fuse wire)
  • A cell balancer / top balancer to balance cells before first use
  • Basic understanding of parallel and series wiring

Use our 18650 Pack Builder for cylindrical cell packs, or our System Calculator to determine how much battery capacity you need.

Not sure how many batteries you need?

Use our system calculator to find the exact battery bank size for your appliances.

Calculate My Battery Size