Installation
24
Selecting battery cables
The total length of each battery cable must be less than 10 feet.
Considerable amperage passes through the DC wiring (battery
cables). Therefore all cables must be properly sized.
Recommended Battery Cable Size
Model Cable Size
Freedom 10 2 AWG
Freedom 15 & 15D 1/0 AWG
Freedom 20 & 20D 2/0 AWG
Freedom 25 3/0 AWG
Freedom 30 3/0 AWG
Make sure that the cable size and type meets with NEC re-
quirements for your installation.
Look for the following cable characteristics:
• UL Listed welding or boat cable that is terminated on each
end with UL Listed or UL Recognized ring terminal con-
nectors.
• The connectors are attached to the cable using a method
approved by the connector manufacturer. Heart Interface
recommends using Thomas & Betts (T&B) part number
BAL 2038 for the terminal. T&B recommends that each
terminal be crimped in two places with a pressure of 15
tons using a hexagonal die. The T&B die has a code num-
ber of 54.
• The barrel of the terminal and the first inch of the cable
must be covered in UL Listed or UL Recognized heat
shrink tubing after the crimp is made. Heart Interface
recommends a 2-inch length of 3M HDT 0800 tubing.
Other heat shrink may be used if it is UL Listed or UL
Recognized, and you follow the manufacturer’s directions.
Installing the battery cables
1. Attach the negative (-) battery cable to the Freedom In-
verter/Charger. Follow the battery hardware stack up
diagram. The negative cable may be black or yellow for
identification.
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