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14 Freedom SW 230V Installation Guide
Planning Preparations
DC Disconnects and Over-Current Devices
The DC circuit from the battery to the inverter/charger must be
equipped with a disconnect and overcurrent protection device. In
Australia, disconnect and overcurrent protection devices must be
approved for use in Australia. Refer to your applicable installation
code for guidance.
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.
Marine Applications
1
A charger needs to be equipped with a
disconnect and an over-current protection device, usually within 18 cm of
each battery’s positive terminal and another over-current protection device
18 cm near the charger’s positive terminal.
DC Grounding
Recreational Vehicles The inverter/charger DC (chassis) ground
terminal needs to be connected to the vehicle chassis by a minimum
8mm
2
copper conductor that is either insulated (green with yellow
stripe) wire rated 75 °C or bare copper.
Marine Applications
2
The DC grounding conductor may be one
size smaller than the minimum size conductor required for the DC
current carrying conductors providing the overcurrent protection
device in the DC positive conductor is rated no greater than 135%
of the ampacity of the DC grounding conductor and the conductor is
no smaller than 2 mm
2
.
Table 3 Recommended Fuse Sizes
Model Minimum Fuse Size (A)
Freedom SW 2524-230 200
Freedom SW 3524-230 250
1.Refer to local electrical codes. 2.Refer to local electrical codes.
Freedom SW 3K2K 230V InvChg Install Guide.book Page 14 Friday, June 20, 2014 9:11 AM