Xantrex Technology RS3000 - Manual (Page 22)

Introduction
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Charging
The RS3000’s charging function:
• produces 150 amps to charge your batteries
• equalizes flooded, lead acid batteries.
Built-in Charge Formulas For the unit to perform at the highest level,
the batteries must be charged correctly. The RS3000 has optimized
algorithms for flooded, gel, and AGM batteries.
Battery Temperature Sensor Since battery temperature is a key factor
in correct charging, the charging formula must be adjusted (automatically
and in real time) according to the actual battery temperature to ensure that
batteries are fully charged, but not overcharged. For this reason,
Xantrex® has included a battery temperature sensor with your RS3000
and has temperature compensated the charge formula.
Manual Equalization Over a period of time, the cells in a flooded
battery can develop uneven chemical states. This can result in a weak
(undercharged) cell which, in turn, can reduce the overall capacity of the
battery. To improve the life and performance of a non-sealed, flooded
battery, the RS3000’s multi-stage charging cycle includes a manual
equalize mode that can be used, if recommended by the battery
manufacturer.
Dead Battery Charging Another feature that the RS3000 includes is
dead battery charging. The RS3000—unlike many chargers—has the
ability to recharge batteries even if the battery voltage is very low.
Load Management The RS3000 has a built-in transfer relay that
connects your inverter output or AC input from the utility grid or
generator to your loads. Because the usual AC power sources such as
campground outlets or small generators often have limited current
availability, having the capability to manage your AC loads is extremely
valuable. The RS3000 provides a number of features to facilitate this:
• The charger is power factor corrected to use AC current as efficiently
as possible and only requires 22 amps to provide rated charger output.
Minimizing the AC current used by the charger means more current is
available for your AC loads.
• RS3000 has a power share feature which prioritizes your AC loads by
reducing the charge current and maintaining the total input current to
less than your breaker setting or the breaker setting.
• Occasionally, AC input sources have low voltage. To avoid loading
these weak sources any further, the charger automatically reduces its
AC current draw as the AC voltage approaches the minimum
acceptable level.