Xantrex RM1012 User Manual download pdf (Page 14)

Operation

2–2

Planning for AC loads

AC load AC load refers to an AC product you want to operate from the

inverter/charger. Loads include most products that you can plug into a

standard 120 volt household electrical outlet.

Var i abl e s

affecting AC

loads

The Xantrex HD inverter/charger inverter can power a wide range of

loads. The size of the load and the length of time you can operate it

depends on variables such as

• type of load

• ambient temperature

• size, state of charge, temperature, and condition of batteries.

The larger your battery capacity and the higher the state of charge, the

longer the inverter/charger can run your AC loads. Battery capacity is

reduced as battery temperature lowers.

Type of loads

AC loads

The way in which an AC load draws power may determine how

effectively it can be powered from the inverter/charger.

Resistive loads Toasters, coffee pots and incandescent lights are examples of loads which

do not need a high start-up current to start running. They use a resistive

heater element to generate heat or light. They are the simplest and most

efficient for an inverter/charger to run. Large resistive loads, such as

electric stoves and water heaters, are impractical since their high current

demands quickly drain the batteries.

Inductive loads TVs, VCRs, stereos, computers, and electric motors (power tools,

vacuum cleaners, for example) are examples of AC loads which surge on

start up, that is, they require a high startup current compared to a resistive

load such as toasters or coffee pots. These loads are known as inductive or

electronic loads. Depending upon the size of the motor, it can take as

much as six times its running current to start it than it does to keep it

running once it has started. This surge can sometimes exceed the

inverter/charger’s maximum output rating and the inverter will shut

down.

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Xantrex RM1012 User Manual Page 14