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13

Planning Preparations

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The Freedom SW 230V system requires a 24-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 52 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 “Battery 
Cabling and Hook-up Configurations” on page 57.

For detailed information about specific brands of batteries, consult 
individual battery manufacturers.

DC cabling includes all of the cables and connectors 

between the batteries, the DC disconnect and overcurrent protection 
device, and the inverter/charger. 

All installations require multi-strand insulated cables. The 

DC cables must be copper and must be rated 75°C minimum. In 
Australia, they must be rated 90°C minimum.

See Table 2 for required DC cable length and 

cable size and Table 3 for required fuse size for the Freedom SW 
230V. Wire size is usually marked on the cables. 

Table 2 Minimum Recommended Battery Cable

a

 Sizes 

a. Copper conductors with thermoplastic insulation rated at 75C or higher. In Australia, 
thermoplastic insulation must be rated at 90C or higher.

Freedom SW 2524-230

140

50 mm

2

 (25 mm

2

)

70 mm

2

 (35 mm

2

)

Freedom SW 3524-230

200

240 mm

2

 (120 mm

2

)

300 mm

2

 (150 mm

2

)

IMPORTANT: Longer cables may cause the inverter to shut down under 
a heavy load.

Undersized cables will overheat. Consult local electrical codes to 
determine minimum required size.

Freedom SW 3K2K 230V InvChg Install Guide.book  Page 13  Friday, June 20, 2014  9:11 AM