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Battery Information
This guide for use by qualified personnel only.
Battery Banks
As your power requirements increase, you may need to use more
than one battery to obtain sufficient capacity. Batteries can be
connected in parallel, in series, or in series-parallel to create higher
capacity systems.
See “Battery Cabling and Hook-up Configurations” on page 57 for
more information about battery inter-connection schemes.
Mixing Batteries Batteries connected in parallel should be of the
same type and amp-hour rating and from the same manufacturer.
It is not recommended to connect batteries of different types, amp-
hour ratings or manufacturers. Improper charging and decreased
battery life will result.
Battery Bank Sizing Worksheet
The following worksheet is a guide to help you determine your
battery needs. Be generous in estimating the time for which you will
run each of the loads to ensure sufficient battery capacity.
Restrictions on Motor Size
An appliance may require three to six times its normal running
current in order to start. The Freedom SW 3524-230 can handle
surges to 6800 watts for five seconds, which translates to a locked-
rotor-amp rating of no more than 50 amps. The locked rotor amp
may be specified on the motor nameplate as “LRA” or “LRI”.
When considering appliances with large motors, follow these
guidelines:
• Make sure that the motor’s LRA rating is no more than 50
amps. The Freedom SW 230V may not be able to start a motor
with a higher LRA, and the Freedom SW 230V will shut down
if the attempt is made.
• Make sure the battery bank, DC cables and DC fuses are
capable of handling up to 600 amps DC for five seconds. A
weaker circuit may not be able to provide sufficient power to
the Freedom SW 230V to allow the Freedom SW 230V to start
up the appliance. Again, if the circuit cannot deliver the
required current, the system may shut down or the fuse may
open.
Freedom SW 3K2K 230V InvChg Install Guide.book Page 55 Friday, June 20, 2014 9:11 AM