A good default is to leave float charging off for a LiFePO4 battery unless its own manual allows or requires it. Check that manual first: if float is unnecessary, choose a charger profile that stops after charging; if it specifies a float setting, use that setting rather than a generic voltage. If you cannot confirm the profile, do not guess.
What float charging does
Float charging is a charger’s low-voltage hold stage after the main charge. It keeps applying voltage instead of stopping the charge cycle. That behavior is not automatically needed just because a LiFePO4 battery stays connected to a charger.
When to leave float off
If the battery instructions say float is not needed, disable the float stage or choose a compatible profile that ends charging. A standby setup does not, by itself, mean you should keep a battery at float. Follow the battery maker’s charging profile for the exact model.
If the manual gives no float setting, do not borrow a value from another battery. LiFePO4 packs and chargers can have different voltage requirements, so a setting that suits one model may not suit yours.
When a float setting is appropriate
Use float only when the instructions for your battery explicitly allow or require it. If they give a float voltage, use that value and make sure the charger is configured for the battery’s voltage and chemistry. “Allowed” does not mean “required.”
For a 36V LiFePO4 battery that uses a 43.8V charging voltage and permits 25A charging, the Vipboss 36V LiFePO4 charger provides a matching 43.8V, 25A output. Its float behavior can be set in line with the battery's specified charging profile.
When the battery manual or charger profile is unclear, identify the exact battery model and get its approved charging settings before leaving the charger connected.
Frequently asked questions
Do LiFePO4 batteries need float charging?
Many LiFePO4 batteries do not require it. Use a float setting only when the battery maker specifies or permits one.
What float voltage should I use for a LiFePO4 battery?
Use the value in the battery documentation rather than applying a generic lead-acid float setting.
Can I leave a LiFePO4 battery connected to a charger after it is full?
Follow the battery and charger instructions for the particular model, including any specified standby or float behavior.
