Batteries & Energy Storage

Start with what you want to back up. A fridge, lights, internet, and outlets run 5-10 kWh per day. Whole-home backup with HVAC typically takes 20-40 kWh. Check your utility bill's daily kWh usage, decide which loads are critical, and size the bank to cover them through your expected outage length — one night for most grid backup, 2-3 days for off-grid.

48V LiFePO4 server-rack modules (EG4, Pytes, Fortress) pair with hybrid inverters like Sol-Ark, EG4, and Victron — modular, serviceable, and the DIY/off-grid standard. High-voltage systems (Enphase IQ, SolarEdge Home, Tesla Powerwall) integrate tightly with their own inverter ecosystems and are typically installer-installed. Choose 48V for flexibility, HV for ecosystem simplicity.

For solar cycling, lithium iron phosphate wins on almost every metric: 4,000-6,000+ cycles vs 500-1,000 for AGM, 90%+ usable depth of discharge vs 50%, half the weight, and a 10-year warranty vs 1-2 years. AGM still makes sense for cold standby applications and tight budgets. If the battery cycles daily, buy LiFePO4.

Check two things: voltage window and communications. Your battery bank voltage must match the inverter's battery input range, and many inverter/battery pairs use closed-loop CAN communication (EG4, Sol-Ark, Victron with Pylontech/Pytes) for state-of-charge reporting and charge control. Most 48V LiFePO4 batteries also run open-loop with voltage-based settings on any compatible inverter.

Batteries ship LTL freight — a server-rack LiFePO4 module weighs 100-150 lbs and full battery banks ship on pallets. Lithium batteries ship as Class 9 hazardous materials with proper documentation, which our logistics team handles. Curbside delivery is standard; liftgate available on request.

LiFePO4 batteries in this collection carry 10-year manufacturer warranties as the category standard, typically guaranteeing 70-80% capacity retention at end of term. Cycle-life ratings of 6,000+ cycles at 80% depth of discharge are common on server-rack cells. Warranty specifics are linked on each product page.