Power Vent Battery Box Vent
Lead-acid batteries produce hydrogen gas when charging. But if the
battery box is left open to vent gas in cold climates, the batteries get too
cold and battery capacity is significantly reduced. A vent that solves this
problem is especially important when battery boxes are placed in basements,
garages and sheds. When heat rises in the structure, a low pressure area
forms around the box, cool air flows into the box and gasses vent into the
structure. The Power Vent controls battery box venting, removing hydrogen
gas while reducing cold air infiltration into the box.
The Power Vent contains a gravity-operated damper that normally
stays closed. When connected to a voltage controlled relay the fan operates
only when the batteries are being charged and blows gas vapors out.
Designed for battery banks under 2200 AH and charge rates under
125 amps. Fan can be operated from the aux relay on a Xantrex SW inverter,
from the auxiliary relay of an Outback FX inverter (use 12v fan for all
Outback inverter voltages) or by a voltage controlled switch (sold
separately on page 53.) The 12/24 volt unit uses 3 watts and pushes air at 6
cfm with a 360° maximum change of direction. Dimensions: 4" diameter x 7.25"
with a 2" PVC pipe socket on the inlet and outlet. The 48 volt unit uses 6
watts and pushes 8 cfm with a 360° maximum change of direction.
Dimensions: 4" diameter x 10" with a 2" PVC pipe socket on the
inlet and outlet.