LiFePO4 100Ah Battery Brands: A Spec-Math Comparison (No Testing Claims)

Quick answer

Before choosing any 100Ah LiFePO4 battery, compare published manufacturer specs, not marketing: rated capacity (Ah), BMS continuous discharge current (A), claimed cycle life, weight, warranty years, and low-temperature charge protection. This is a spec-math comparison — we do not test batteries and make no testing claims. Every number comes from a brand’s own product page or spec sheet fetched for this article; anything unverifiable is marked verify before buying.

Across the five brands we checked: nearly every 12V 100Ah LiFePO4 claims ~1,280Wh (100Ah × 12.8V), a 100A BMS, 4,000+ claimed cycles, and weighs 21–27 lbs. The differences show up in the details — peak/continuous discharge limits, the fine print under cycle-life claims, warranty terms, and cold protection. Learn those four specs and you can size and compare any battery yourself.

Key takeaways

• Energy, not amps, is the honest unit. 100Ah × 12.8V = 1,280Wh total; at a realistic 90% usable depth of discharge, that’s ~1,152Wh usable.
• BMS continuous current is the limit that matters. 1,000W ÷ 12V ≈ 83A — a 100A BMS is at ~83% of its continuous rating, so keep at least 200W of headroom (the “200W headroom rule”).
• “4,000 cycles” is a claim, not a guarantee. Typically tested at a stated DOD and temperature; real-world cycles depend on how you run the battery.
• Weight is a sanity check. A genuine 100Ah LiFePO4 (four prismatic cells) weighs ~19–25 lbs; suspiciously light batteries may use fewer, smaller, or lower-grade cells.
• Cold protection comes in two flavors: a BMS that cuts off charging below ~32°F (0°C), or a heated/self-heating version that warms cells so you can keep charging in freezing weather. Know which you’re buying.
• Price is not in this article (per marketplace rules). We teach the $/usable-Wh method so you can compute value with today’s listed price.

The spec table: five brands, published numbers only

The models are the standard “100Ah deep-cycle” offering from each brand: Renogy Core Mini 12.8V 100Ah, LiTime 12V 100Ah Group 24, Redodo 12V 100Ah Group 31 Basic, ECO-WORTHY 12V 100Ah (SOC display), ExpertPower EP12100. Numbers come from the brands’ own product pages unless marked verify before buying. Cycle life is always labeled claimed — it’s a manufacturer test claim, not our measurement.

Peak discharge differs meaningfully: Renogy claims 300A for 5s, LiTime 280A for 5s and 400A for 1s, Redodo 300A for 1s, ExpertPower 200A for 2s. ECO-WORTHY does not publish a peak number (verify before buying). Peaks fund short surge loads (inverter start), not continuous loads.

How to read “claimed cycles”: Renogy’s 5,000 is at 0.5C discharge and 80% DOD; Redodo’s 4,000+ at 0.2C and 100% DOD; LiTime states 4,000 at 100% DOD and higher numbers at gentler DOD. None is a promise of what your battery will do — they’re lab claims under stated conditions, which is why we always write “claimed.”

What each spec means for your build

$/usable-Wh method (no prices, by design)

We’re not allowed to print prices here, and prices change weekly anyway. So here’s the method to compare any two batteries on value, using today’s listed price:

Usable Wh = 100Ah × 12.8V × 0.9 usable = 1,152Wh usable

That 0.9 is a realistic usable depth of discharge for LiFePO4 (see our lithium-ion vs lead-acid comparison for why usable DoD is ~80–90%, not 100%). Then:

$/usable-Wh = today’s listed price ÷ 1,152 usable Wh

Worked (illustrative) example — placeholder, not a real price: if a battery is listed at $X where X = 300, then $300 ÷ 1,152Wh ≈ $0.26 per usable Wh. Do the same for a competitor at $Y; lower $/usable-Wh wins on pure energy cost. Add warranty years and cold protection on top — a few cents per Wh can buy years of coverage.

For the broader cost-per-kWh picture (including lifespan), see our solar battery cost per kWh guide.

Weight sanity check: suspiciously light = suspect cells

A true 100Ah LiFePO4 contains four prismatic cells plus a BMS, busbars, and a case. Across the five brands we fetched, published weights run 21.8 lbs (Renogy), 21 lbs (LiTime), 22.05 lbs (Redodo), 23.37–25.1 lbs (ECO-WORTHY), 27 lbs (ExpertPower) — bracketing the ~19–25 lb range you’d expect from real cells.

The check: if a “100Ah” battery weighs meaningfully less than ~19 lbs, ask why. Fewer cells means less capacity; lighter cells can mean lower grade. Weight can’t prove a battery is good — but a battery far under normal weight for its chemistry and capacity is a red flag.

BMS current vs inverter draw: the 200W headroom rule

Your inverter sees watts, the battery’s BMS sees amps:

Inverter draw (amps) ≈ inverter watts ÷ 12V

A 1,000W inverter at full load pulls 1,000W ÷ 12V ≈ 83A. On a 100A continuous BMS, that’s 83% of the limit — one sag, surge, or cold cell away from the BMS tripping mid-load.

The 200W headroom rule (a rule of thumb, not a spec): size so continuous load stays at least ~200W under what the battery can feed. For a 100A BMS at ~12.8V nominal that’s ~1,280W theoretical but ~1,050–1,100W practical continuous. If you’ll run a 1,000W inverter regularly, or any load near the BMS ceiling, step up to a 200Ah battery or add a second 100Ah in parallel. See our BMS explainer for how the protection board behaves, and our runtime math article for how long 100Ah lasts under real loads.

Cycle-life claims: 3,000–4,000+ cycles, but read the conditions

Almost every brand claims 3,000–4,000+ cycles to 80% capacity — sometimes more. That’s a lab test under specific conditions; three things change real-world life:

1. Depth of discharge — LiTime publishes 4,000 cycles at 100% DOD but 6,000 at 80% DOD and 15,000 at 60%. Shallower cycles last longer.
2. Discharge rate — Renogy’s 5,000-cycle claim is at 0.5C; Redodo’s is at 0.2C. Gentler pulls age cells less.
3. Temperature — cold charging and sustained heat shorten life. A battery never charged below freezing will generally outlast one that is.

Treat any cycle number as “claimed, under stated lab conditions” and compare claims only apples-to-apples (same DOD and C-rate). For what cost-per-kWh works out to over the battery’s life, read our solar battery cost per kWh analysis.

Cold protection: heated versions vs charge-cutoff BMS

This is the spec most people miss. Two different designs:

• BMS charge cutoff — the battery refuses to charge below ~32°F (0°C), protecting cells but leaving you with no charging on a freezing morning. Renogy’s Core Mini has this built-in (“built-in low-temperature charging cut-off … below 32°F / 0°C”). LiTime’s base Group 24 has no low-temp protection; its own FAQ says to charge only above 32°F (0°C) and bring it indoors to charge in freezing weather. ExpertPower lists charge temperature 32°F–140°F with no low-temp protection feature (verify before buying).
• Heated / self-heating version — a built-in heater warms the pack so you can keep charging in cold (e.g., LiTime’s “Cold Weather” models, Redodo’s “Heating” 100Ah, Renogy’s Pro self-heating series). Heated versions cost more but matter for winter off-grid, RVs, and cabins where the battery lives outdoors.

ECO-WORTHY’s page lists “low-temperature protection” on the 100Ah SOC-display model but doesn’t publish the exact cutoff temperature — verify before buying if you’ll charge in cold.

If you live with freezing winters, this one spec should be a deciding factor, not an afterthought.

What we’d verify before buying (checklist)

Bring this list to the product page and the full spec sheet — not the marketing bullets:

1. Rated capacity and nominal voltage — 100Ah at what C-rate and temperature? (e.g., “100Ah @ 0.5C, 25°C” vs “@ 0.2C”).
2. BMS continuous discharge current — 100A is common; confirm it’s continuous, not peak. Compare against your inverter’s max draw (watts ÷ 12V).
3. Peak discharge and duration — 300A @ 5s vs 300A @ 1s differ for surge-heavy loads.
4. Cycle-life claim and its conditions — meaningless without the DOD and C-rate attached.
5. Weight — should land ~19–25 lbs for a true 100Ah LiFePO4; verify against the published cell count if given.
6. Warranty years and what’s covered — prorated vs full replacement changes what the warranty is worth. See best solar batteries 2026.
7. Cold protection — charge-cutoff BMS vs heated; and the exact cutoff temperature if published.
8. Certifications & ratings — e.g., UN38.3 (transport), UL listings; all brands here list at least some (UN38.3, CE, FCC, RoHS or UL on ExpertPower’s cell-level spec).
9. Usable energy, not raw Ah — 100Ah × 12.8V × 0.9 = 1,152Wh usable; divide today’s price by that for the $/usable-Wh comparison.
10. Expansion and terminals — series/parallel limits and M8 terminal compatibility with your busbar/lugs.

For full runtime, usable-capacity, and chemistry math, start with how long will a 100Ah battery run and lithium-ion vs lead-acid. For a broader 2026 look, see best solar batteries 2026.

FAQ

Next logical reads

• How long will a 100Ah battery run? The runtime formula, decoded
• Lithium-ion vs lead-acid batteries (solar comparison)
• Solar battery cost per kWh: pricing, lifespan, and value
• Solar battery management systems (BMS): what they do and when you need one
• Best solar batteries for home 2026: brand comparison guide