Marathon Power TRTC-2002-N1, Installation, Operation And Maintenance Manual

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Battery Care
This is intended only as general information for customers and end users of Marathon Power
UPS product with lead-acid storage batteries.
Customers routinely have questions about the lifespan of batteries. There are several factors
that all contribute to the useful life of the batteries used with the UPS:

The ambient temperature around the UPS.

How many times the batteries are discharged and recharged.
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How well the batteries were stored and maintained, both prior to installation and during
the life of the UPS.
The life span of the batteries is typically 3-5 years. Whether it’s closer to 3 years or 5 years
depends primarily on the factors above. For cooler operating environments, with fewer
discharge/recharge cycles on well-maintained batteries, the life expectancy of a battery can
approach up to 5 years. On the contrary, in the operating environments with extreme heat
and moisture and numerous discharge/recharge cycles with poorly stored and maintained
batteries the life of a battery can be reduced to two to three years.
If batteries are overly discharged or left standing in the discharged state for prolonged
periods, hardened lead sulfate coats the electrodes and will not be removed during
recharging. Such build up reduces the efficiency and life of the batteries and may
permanently damage the battery. Also, over-charging can cause electrolyte to escape as
corrosive gases. If a battery that has been damaged due to its internal chemistry as
described above is used in a UPS, it can appear to the charging circuit as a “short circuit”
causing excessive current to flow through the input and charger circuits and consequently
destroying them.
Storage Notes
Please adhere to the following storage instructions if the UPS is not to be installed
shortly after the delivery.

Store the unit as is in its original packing and shipping container.

The optimum storage temperature range is 5°F to 77° (-5°C to +25°).

Ensure that the equipment is fully protected from wet or damp areas and from
moisture.

Ensure that the UPS is recharged every 6 months for at least 8 hours in order to
maintain battery energy and maximize useable life.
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