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Planning
This guide for use by qualified installers only.
DC Components

Batteries

The Freedom SW 3000 system requires a 12 volt, lead-acid deep-cycle
battery or group of batteries to provide the DC current that the inverter/
charger converts to AC power. The battery may be a flooded, gel, or AGM
type.
See “Battery Information” on page 41 for information on:
• Estimating the battery size that will meet your requirements.
• Designing battery banks.
• Restrictions on the size of appliances.
For information on cabling and hooking up batteries, see “Cabling and
Hook-up Configurations” on page 45.
For detailed information about specific brands of batteries, you’ll need to
consult individual battery manufacturers for this information.

DC Disconnects and Over-Current Devices

The DC circuit from the battery to the inverter/charger must be equipped
with a disconnect and over-current protection device. (Refer to your
applicable installation code.)
Type This device usually consists of a circuit breaker, a “fused-
disconnect,” or a separate fuse and DC disconnect. Do not confuse AC
circuit breakers with DC circuit breakers. They are not interchangeable.
Rating The rating of the fuse or breaker must be matched to the size of
cables used in accordance with the applicable installation codes.
Location The breaker or fuse and disconnect should be located as close
as possible to the battery in the positive cable. Applicable codes may limit
how far the protection can be from the battery.

DC Cabling

Definition DC cabling includes all of the cables and connectors between
the batteries, the DC disconnect and over-current protection device, and the
inverter/charger.
Type All installations require multi-strand insulated cables. The DC
cables must be copper and must be rated 105 °C minimum.
Size and Length See Table 3 for required DC cable length, cable size and
required fuse size for the Freedom SW 3000. Wire size is usually marked on
the cables.
IMPORTANT:
Using a smaller gauge cable or a longer cable may cause the
inverter to shut down under heavy load.
Table 3
Recommended DC Input Cable and Fuse Size
Maximum DC
Cable Length:
Battery to
Freedom SW
3000 (one way) Total Length
(two way)
Minimum
Recommended
Cable Size Maximum Battery
Fuse or Breaker
10 feet (3 meters) 20 feet (6 meters) No. 4/0 AWG 400A class T