Battery Charging - Xantrex Freedom HF Owner's Manual

Battery Charging

Trouble Loads
NOTICE
EQUIPMENT DAMAGE
Some equipment may be damaged by the Freedom HF's modified
sine wave output, which has a different wave form than utility-
supplied electricity.
Failure to follow these instructions can result in equipment
damage.
Some appliances, including the types listed below, may be
damaged if they are connected to the Freedom HF:
Speed controllers found in some fans, power tools, kitchen
n
appliances, and other loads may be damaged.
Some chargers for small rechargeable batteries can be
n
damaged. See Precautions When Using Rechargeable
Appliances on page 9 for details.
Metal halide arc (HMI) lights can be damaged.
n
IMPORTANT: If you are unsure about operating any device with
the Freedom HF, contact the manufacturer of the device to ensure
that it is compatible with the modified sine waveform.
38

Battery Charging

Battery charging is possible only when shore power is present and
the Freedom HF unit is connected to a battery (or battery bank).
The frequency of battery charging is determined by how much
energy in the battery is used up during inverting. Whenever the
Freedom HF detects a battery voltage that falls below 12.8 volts,
the unit will begin charging the battery, i.e., enter into bulk and
absorption stages then settle in float stage. If battery voltage does
not reach 5 volts after one minute or 10 volts after 15 minutes as
shown in the graph, the unit will terminate the charging process
and the error code E12 will show on the display screen.
Figure 16 illustrates the three-stage charging process used to
maximize Freedom HF's charging efficiency.
Freedom HF Owner's Guide