Which battery chemistry actually fits your setup?

LFP typically lasts 3,000 to 6,000 cycles and resists thermal runaway better, while NMC packs more energy into less space and weight. The LFP vs NMC comparison and safety certification tool break down both sides with real numbers. The usable versus nameplate capacity calculator shows how much of that rated capacity you can actually draw on.

Most residential LFP batteries are rated for 4,000 to 6,000 cycles at 80% depth of discharge before falling to 80% of original capacity. The cycle count to years converter and depth of discharge tool turn that rating into a real timeline for your own usage. NREL's energy storage research program tracks how these cycle-life figures hold up in long-term testing.

Yes. Lithium batteries typically lose around 20% of usable capacity right at freezing, and that loss grows substantially in more severe cold, reaching 35% or more by 14°F and up to roughly 50% at 0°F and below. Charging much below 32°F risks permanent damage on most chemistries. The cold weather loss calculator and temperature derate calculator show the loss for your specific low. The cold climate efficiency gain calculator shows what the same cold does to the rest of the system.

Daily cycling favors a chemistry rated for high cycle counts at partial depth of discharge, while backup-only use favors cheaper chemistry since cycles stay low for years. Compare both paths with the daily cycling tool and backup only tool. The Department of Energy's energy storage overview explains where each use pattern fits in a home system.