Wagan 2007-2, User Manual, Page: 15 / 22

User’s Manual—Please read before using this equipment.
15
Note:
If an extension cord is used from the inverter to the appliance, limit the extension cord length
to 50 feet or less. Make sure that the cord is properly rated to carry the appliance load.
Charging The Battery Bank
It is not the purpose of this Inverter User’s Guide to provide detailed information regarding
battery charging systems. However, the user should try to augment any charging system with
either wind power or solar power. These can continue to operate during power outages and
they also reduce recharge time. If automatic AC powered battery chargers do not provide
enough charging current for a larger battery bank, is permissible to have two automatic
battery chargers connected to the battery bank.
Regular Loss Of Commercial Power
If the inverter system is used during commercial power outages that occur daily, configure
the charger system to replace energy during the time that commercial power is available.
Replacement of battery energy always requires more than was taken from the battery
(typically 130%). In the example used earlier in this document, the AC load ran for 10 hours.
If commercial power is available, there are approximately 1 hours left in the day to do the
recharging. The following is an example of what is necessary to recharge a battery bank
that has 16,500 Ah of capacity (as in the example above) and has been discharged to 10.5
volts (discharged). The charger has to replace 2,15 Ah (1650 x 1.3 Ah) in 1 hours. So the
charger must charge at a rate of 153 Amps for 1 hours. As this charge current is distributed
among the batteries in the battery bank, the current received by an individual battery is
within its charge rating. Be sure that the battery is well vented as the area will likely have
accumulations of an explosive mixture of hydrogen and oxygen. Follow all recommendations
for use that are contained in the battery charger manual.
WARNING
THERE IS DANGER OF EXPLOSION. DO NOT CONNECT OR DISCONNECT CHARGER
CABLES DIRECTLY AFTER BATTERY DISCHARGE OR RECHARGE – MAKE SURE THAT THE
BATTERY BANK AREA IS WELL VENTED BEFORE ATTACHING OR REMOVING CABLES.
If the flooded lead acid batteries are used, as examples given in this document, be sure that
periodic checks of battery electrolyte levels are accomplished. Follow battery manufacturer’s
instructions in keeping the electrolytes at the proper level. Be sure to use pure distilled water
when replacing evaporated electrolyte liquid.
Aboard A Vessel Or Vehicle.
Manufacturer supplied engine driven alternators can usually be replaced with one that can
continuously deliver higher amperage. This should be done at the outset. Keep the batteries
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