Introduction
8
900-0258-01-00 Rev A
Self-Discharge
Unlike many conventional batteries, 1000XLC batteries won’t discharge significantly over time
once charged, even in storage. This is especially true if the batteries are kept relatively cool.
Fully charged, the natural (“rest”) voltage of 1000XLC batteries is approximately 52.0 Vdc
(2.2 volts per cell or Vpc). A battery should have a freshening charge (see page 25) if its rest
voltage is below 50.4 Vdc (2.1 Vpc). A battery should not be used if its rest voltage is 48 Vdc
(2 Vpc) or lower upon delivery. Contact Outback Power upon receiving a battery in this state.
Storing EnergyCell 1000XLC Batteries
The EnergyCell 1000XLC batteries must be given a freshening charge every 6 months when
stored at 77°F (25°C). If stored in higher temperatures, the charge should be more often.
Capacity
Battery capacity is given in ampere-hours or amp-hours (Ah). This is a current draw which is
multiplied by the duration of current flow. A draw of
X
amperes for
Y
hours equals an
accumulation of
XY
amp-hours.
Because the battery’s chemical reaction constantly releases energy, its amp-hour capacity is
affected less by lighter loads. The battery has greater capacity under lighter loads.
For example, if the EnergyCell 1000XLC is discharged at the 20-hour rate to a voltage of
1.75 Vpc (a load expected to effectively drain 100% of its capacity in 20 hours), it will be
measured to have 972 amp-hours. However, at the 2-hour rate, a heavier load, only 572
amp-hours will be measured. For all tested discharge rates and amp-hours, see Table 3 on
page 33.
State of Charge
The EnergyCell State of Charge (SoC) can be determined by two methods. One is to measure
its voltage. This is accurate only if the batteries are left at rest (no charging or loads) for 24
hours at room temperature (77°F or 25°C).
If these conditions are not met, then voltage
checks may not yield usable results.
If they are met, then on average, a battery at 52.8 Vdc
(2.2 Vpc) will be at 100% SoC. A rest voltage of 48.8 Vdc (2.03 Vpc) represents roughly
50% SoC.
Figure 3 Capacity vs. Temperature
Summary of Contents for Outback Power EnergyCell 1000XLC
Page 1: ...EnergyCell 1000XLC Owner s Manual...
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Page 28: ...Operation 28 900 0258 01 00 Rev A NOTES...
Page 32: ...Troubleshooting and Maintenance 32 900 0258 01 00 Rev A NOTES...
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