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Basic Installation Procedures
975-0468-01-01 1–7
This guide for use by qualified installers only
AC shore power A source of 120 V, 60Hz sine wave alternating current is needed to
provide energy to charge batteries and pass power through to AC loads.
This source is usually the utility grid (power company) or an AC
generator. An automatic or manual AC source selector switch can be used
to switch between the multiple sources of shore power to the Freedom
HW system.
The AC source feeding the Freedom HW must have the neutral conductor
bonded to ground. When the inverter passes shore power through, it will
lift the bonding relay on the output and will rely on the input being
bonded in order to ensure that the power delivered to a sub panel is
properly bonded. See “AC Output Neutral Bonding” on page 1–9 for
more information on bonding relay operation.
Generator The Freedom HW is compatible with most generators which produce
nominal 120 Vac 60Hz sine wave AC power.
Since the DC charging current limit of the Freedom HW may be
configured to provide as little as 7 A it is possible to use very small
generators with the Freedom HW to charge batteries. The Freedom HW
has been tested with generators of various sizes, including some as small
as 700W.
AC Disconnect
and Over-
Current
Protection
Device
Most safety requirements and electrical codes require the Freedom HW’s
AC and DC inputs and outputs to be provided with over-current
protection (such as circuit breakers or fuses) and disconnect devices.
AC Input: The circuit breaker or fuse (connected through hard
wiring) that is used to supply the Freedom HW must be rated at no
more than 30A and must be approved for use on 120 Vac branch
circuits. The wire used between the breaker and the Freedom HW
input must be sized adequately to carry current up to the rating of the
input breaker and in accordance with the electrical codes or
regulations applicable to your installation.
Important:
Throughout this manual, the term “shore power” refers to AC
input power from a utility grid, generator, or other AC source.