Battery Temperature Limits: Charge and Discharge Ranges by Chemistry

Temperature limits are the specification most likely to be buried, inconsistent, or simply absent from a battery’s headline datasheet. This page collects what we could verify, by manufacturer, and states plainly where a commonly repeated number could not be confirmed. For the mechanism behind these limits — why LiFePO4 has a charge cutoff at all, and why lead-acid doesn’t — see Charging LiFePO4 Below Freezing.

LiFePO4 charge cutoff temperatures

Manufacturer	Stated charge cutoff	Source / confidence
Battle Born	0 °C / 32 °F (body text)	Battle Born’s own material is internally inconsistent — a page heading elsewhere states 25 °F (-3.9 °C) for the same limit. Both figures appear in the same publisher’s material.
Victron	5 °C / 41 °F (default setting)	Stated in the Victron LiFePO4 datasheet; Victron links lowering this setting to a possible effect on warranty coverage.
EG4	0 °C / 32 °F (advertised)	From EG4’s product page. Field and teardown reports describe the BMS’s actual disconnect triggering nearer -5 °C (23 °F), but we could not confirm that figure against EG4’s own published specification, so it is not listed as a verified cutoff here.
Discover (AES line)	0 °C / 32 °F	Discover’s AES operating manual documentation. A recovery point around 2 °C (36 °F), above which charging re-enables, is commonly cited for this product line; we could not independently confirm the exact recovery figure.
Renogy	Not listed	Renogy’s cold-charge specification page returned repeated access errors during research and could not be verified. Do not treat any commonly quoted Renogy cutoff as confirmed by this page.

Do not average these into “LiFePO4 charges above 0 °C” as a rule of thumb. The spread between Victron’s 5 °C and the 0 °C others advertise is enough to matter on a marginal morning, and the gap between EG4’s advertised figure and its reported real-world behavior is exactly the kind of thing a datasheet won’t tell you. Check the specification for your model.

LiFePO4 discharge temperature ranges

Manufacturer	Discharge range	Source
Battle Born	-20 °C to 60 °C (-4 °F to 140 °F)	Battle Born product specification.

We’re listing only the one range we could confirm cleanly. As a general pattern across LiFePO4 products, discharge ranges run substantially colder than charge ranges — often by 20 °C or more — because discharge does not carry the lithium-plating risk that constrains charging. Confirm the exact figure for your own battery rather than assuming Battle Born’s number applies universally.

Lead-acid electrolyte freezing point by state of charge

Lead-acid has no charge-temperature cutoff in the LiFePO4 sense. Its cold-weather constraint is that the electrolyte itself can freeze, and the freezing point depends on the acid concentration, which falls as the battery discharges.

Approximate state of charge	Specific gravity	Electrolyte freezes at
Fully charged	1.280	-68.9 °C (-92 °F)
Nearly discharged	1.100	-7.2 °C (18.9 °F)

The practical rule this produces: never charge a battery that is already frozen, and never leave a lead-acid battery sitting at a low state of charge through a hard freeze. A fully charged battery in a genuinely cold climate is in little danger from electrolyte freezing; a discharged one in a modest freeze is not.

Lead-acid temperature-compensated charging

Charging voltage targets for lead-acid need to rise as temperature falls, the opposite direction intuition suggests, because the chemistry’s reaction kinetics slow down in the cold.

Coefficient	Reference temperature	Source
-5 mV per cell per °C (-2.8 mV per cell per °F)	25 °C (77 °F)	Trojan User’s Guide

Applied to a 12 V (6-cell) battery with a representative 14.4 V absorption target at 25 °C — confirm the baseline against your own charger and battery combination, since absorption targets vary by product:

Ambient temperature	ΔV per cell	ΔV total (6 cells)	Target absorption voltage
35 °C (95 °F)	-0.050 V	-0.30 V	14.10 V
25 °C (77 °F) — reference	0	0	14.40 V
10 °C (50 °F)	+0.075 V	+0.45 V	14.85 V
0 °C (32 °F)	+0.125 V	+0.75 V	15.15 V
-10 °C (14 °F)	+0.175 V	+1.05 V	15.45 V
-18 °C (0 °F)	+0.215 V	+1.29 V	15.69 V

V_target = V_25 + (-0.005 V/cell/°C) × (T_actual − 25°C) × cell count

A charge controller without temperature compensation, left at a fixed 14.4 V year-round, undercharges a lead-acid bank every time ambient temperature drops meaningfully below 25 °C — which both raises the electrolyte’s effective freezing point (per the table above) and contributes to sulfation over repeated cycles.

Why LiFePO4 has a charge floor but not a discharge floor

Charging pushes lithium ions into the graphite anode, a reaction (intercalation) that slows down sharply in the cold; ions that arrive faster than the reaction can absorb them plate onto the anode as metallic lithium instead, a permanent loss and, in enough volume, a dendrite and internal-short risk. Discharge moves ions the other direction and doesn’t create that plating pathway, which is why every manufacturer above rates discharge tens of degrees colder than charge. The full mechanism, with Battle Born’s own explanation of the plating pathway, is covered on our cold-weather charging article.

Using this page

Match your battery’s actual manufacturer and model to the charge-cutoff table before assuming a round number. If your battery isn’t listed, its datasheet’s temperature section — not a forum thread — is the source to trust.

A few practical checks worth running before winter:

• Does the BMS actually enforce the cutoff, or just report temperature? Some BMS units require the charge controller or inverter to read the temperature and act on it externally; a battery that “has a temperature sensor” is not automatically a battery that stops itself from charging.
• Does your charge controller have a low-temperature charge lockout, and is its threshold set to match your battery — not a factory default that may assume a different chemistry? A controller configured for a generic lithium profile may not match your specific manufacturer’s cutoff.
• For lead-acid, does the controller have an active temperature-compensation curve, not just a fixed absorption voltage? Compensation is a charge-controller setting, not a battery property, and it needs a temperature sensor — usually a small probe clipped to a battery terminal — to function at all. Confirm the curve’s 25 °C reference voltage matches what your battery’s manufacturer recommends before trusting the derived numbers above.
• If a LiFePO4 battery will regularly sit at or below its charge cutoff while the array is producing, a self-heating variant or an insulated, separately heated enclosure is the fix — not a lower BMS setting, which does not change the underlying plating chemistry.

What isn’t verified here

We would rather leave a gap visible than fill it with a plausible number. Not included, and not to be treated as confirmed if you see them elsewhere: Renogy’s charge cutoff, EG4’s specific BMS trip temperature below its advertised 0 °C, Discover’s exact recovery temperature above its 0 °C block, gel batteries’ temperature range (not separately published by the manufacturers we checked), and discharge ranges for any LiFePO4 manufacturer other than Battle Born.