LiFePO4 Batteries

LiFePO4 stands for lithium iron phosphate — a specific lithium battery chemistry that uses an iron phosphate cathode instead of the nickel or cobalt found in laptop and phone batteries. The result is a battery that's more thermally stable, lasts significantly longer (3,500–5,000+ cycles), and is safer for marine, RV, and off-grid applications where reliability matters more than shaving a few ounces of weight.

LiFePO4 is actually a type of lithium-ion battery — just a different chemistry. Standard lithium-ion (NMC or LCO) uses nickel, manganese, or cobalt and prioritizes energy density — great for phones, not ideal for a marine house bank. LiFePO4 trades a bit of energy density for dramatically better thermal stability, longer cycle life, and safer failure modes. That's why it's become the standard for boats, RVs, solar systems, and backup power — applications where the battery sits in a confined space and needs to last a decade.

Discharging in cold temperatures is fine — LiFePO4 cells will deliver power down to -20°C without issues. Charging is the concern. Pushing current into lithium cells below 0°C causes lithium plating, which permanently damages the battery. Self-heating models from Epoch and ReLion solve this by warming the cells automatically before accepting charge. Victron-compatible batteries add another layer by communicating cell temperature to your charger, preventing cold-charge damage at the system level.

Most quality LiFePO4 batteries are rated for 3,500 to 5,000+ charge cycles at 80% depth of discharge. In practical terms, that translates to 8–12 years for typical marine, RV, or off-grid use. Compare that to lead-acid batteries, which typically last 300–500 cycles or 2–3 years. The upfront cost is higher, but the total cost of ownership over a decade is significantly lower with LiFePO4.

In most cases, yes — LiFePO4 is a drop-in replacement for standard lead-acid batteries (Group 24, 27, 31 sizes). The main thing to check is your charger. LiFePO4 batteries require a lithium-compatible charge profile — the absorption and float voltages are different from lead-acid. Many modern Victron and Epoch chargers support lithium profiles natively. If yours doesn't, you'll need to either adjust the settings or upgrade the charger. We can advise on compatibility for your specific setup.

It depends on what you're powering and for how long. A rough approach: calculate your daily energy consumption in watt-hours, divide by your battery voltage, and add 20% buffer. For a trolling motor running 4 hours at moderate thrust, a 100Ah 12V battery is often sufficient. For a full RV house bank with fridge, lights, and inverter, you're looking at 200–400Ah at 12V. Not sure? Contact us with your setup details and we'll size it for you — no charge.

Yes — free shipping on all battery orders across Canada. We ship from our warehouse in Ontario. LiFePO4 batteries are classified as dangerous goods for air freight, so all battery shipments travel by ground. Delivery times vary by province but typically range from 3–7 business days.