Wiring Schematic
63
Freedom SW-RVC Installation Guide
For a Flooded type battery bank, the preferred charge rate (in
Amps) is usually 10-15% of C where C = battery bank’s total
Amp-hour capacity. However, the industry-accepted maximum
charge rate is 25% of C. Some AGM or Gel battery models may
have a maximum charge rate as high as 50% of C and in rare
cases, up to 100% of C.
NOTICE
BATTERY DAMAGE
Do not exceed the battery manufacturer’s recommended
maximum charge specifications because the resulting battery
temperature rise shortens battery life.
Failure to follow these instructions can result in battery damage.
Calculations
Once installed and configured, each Freedom SW-RVC charger in
the dual configuration should be set to its own bulk charge current
limit as follows:
Industry accepted maximum charge rate (%)
x battery bank’s total Amp-hour capacity (C)
x 1/2 (for one of the chargers)
= Maximum charger #1 output current (in Amps) allowed in bulk mode (also
limited to the charger’s maximum capacity)
To calculate the system total bulk output for the stacked
pair,
Charger #1 output current (in Amps)
+ Charger #2 Actual output current (in Amps)
= System Total BULK output current (in Amps)
The System Total BULK output current flows into the battery
bank. As such, this total bulk current is split/distributed within the
bank through each individual parallel and/or series connected
battery. Therefore, the current each battery “sees” must not
exceed each individual battery’s maximum allowed charge current
as specified by the battery manufacturer. Since most battery
banks are comprised of the same battery type, model and length
of interconnecting cables, current sharing is roughly equal through
each parallel branch of batteries. Therefore, the above
generalizations of maximum charge rate (%) can be made for the
entire battery bank.
The Freedom SW-RVC’s
Max Chg Rate (%)
setting defaults to
100 (adjustable from 0 to 100). So if the Freedom SW-RVC with a
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