Low Temperature affect on batteries

Low temperatures will affect batteries.

Consistently low temperatures will dramatically shorten the life of a battery .

As we have discussed in other FAQs the ambient temperature has a significant impact on the longevity and performance of VRLA batteries. Batteries operate best in an ambient range of 18C to 22C. Batteries like consistency for a long useful working life.

How does low temperatures affect batteries?

The lower the temperature, the higher the float voltage.

This in itself is not a problem but it means that the charging voltage should be increased accordingly.
Most forget to manually increase the charging current to compensate & that is then an issue.

Another affect on batteries is the dramatic reduction in effective capacity.

For example, temperatures that are less than +10 degrees C this becomes quite considerable.
Because at less than +10 C a battery depletes in a third of the time than it does when the ambient is +18-22C

What about FROST Damage?

Should batteries be subject to frost damage then the batteries will be permanently destroyed

NEVER re-use batteries that have been subject to Frost or below ZERO damage.

The outer casting will have been compromised and the acid WILL LEAK .

Low temperature affects on batteries will also cause micro cracks.
You may not see the hairlines cracks in the outer casing but they now exist.
Once the battery warms up , the acid will leak out

Replace these batteries immediately and take care to ensure that such low temperature damage can never happen again.

ALWAYS monitor the ambient temperature of the battery environment.
NEVER let the ambient drop below at worst +16C

Low Temperature damage to batteries, can be avoided.
Here’s How.Firstly carry out battery maintenance.

Low temperature affects on batteries

Ensure that the battery or batteries are in a controlled environment

To avoid damage protect batteries from :-

Wind Chill factor
Low Temperatures
Water Damage
Frost Risk
Always keep well ventilated
Keep batteries level and dry
Ensure the battery terminals clear and greased
Remember to keep the batteries top up with liquid ( as stated by the manufacturer )
Carry out weekly visual checks for the appearance of any fluid leaks
Check that the battery charging unit is still charging your battery/batteries

The moral of the story is to stop Low temperature affects on batteries
whether in storage or in operational use, always store at an ambient temperature of + 18 to + 22 degrees C.


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Power Continuity Engineers

Call us on 0845 055 8455

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