Vanner SRC12-1200L Owner's Manual - Owner'S Manual - D913482
Owner's Manual - D913482
SRC12-1200L/S INVERTER/CHARGER
10/31/08 - 10:20 AM
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I N C O R P O R A T E D
12 APPENDICES
12.1 PROBLEM LOADS
Although modified sine wave inverters will operate most AC loads, some loads may exhibit problems
because the waveform is different than the pure sine wave of utility power. This is due to the square wave
components and that the peak voltage is not quite as high as a pure sine wave. Loads that may exhibit
problems include: motor speed controls (found on ceiling fans and air conditioner fans), light dimmer
controls, clocks, microwave ovens (cooking time may vary and the clock may be erratic), video monitors
and TVs (may have lines in the picture), AM radios (may pick up noise), laser printers, copying machines,
fluorescent lights, and power supplies in some electronic devices. Rechargeable battery devices may also
overheat and be damaged by the inverter. If you desire to operate a rechargeable battery device on the
inverter you should first power it up and closely observe it for a period of time to ensure that it does not run
too hot.
12.2
AMPERE-HOUR (A-H):
A unit of measure for a battery's electrical storage capacity, obtained by multiplying the
discharge current in amperes by the time in hours of discharge. The rating is usually for a
discharge period of 20 hours and an end voltage of 10.5 volts. Example: A battery, which
delivers 5 amperes for 20 hours, has a capacity of 100 A-H. 5 amperes x 20 hours = 100
Amp-Hr.)
The reason the A-H rating is misunderstood is simple. A battery that has a rating of 100
AH cannot always deliver 100 A-H. The underlying reason is the efficiency with which the
battery converts its chemical energy into electric energy. The A-H capacity of a battery is
affected in the following ways:
12.3
DISCHARGE RATE:
A battery becomes less efficient as the discharge current increases. For example, a typical
100 A-H battery is specified to be able to deliver 5 amps for a period of 20 hours. If the
discharge current were increased to 25 amps, the capacity will be reduced to approximately
75 A-H (25 amps x 3 hours = 75 A-H).
12.4
OPERATING TEMPERATURE:
A battery becomes less efficient at lower temperatures. Most battery manufacturers specify
the battery A-H capacity at 80°F (27°C). At a temperature of 32°F (0°C), the same battery
will have only about 65% of its rated capacity even though it may be fully charged. At a
temperature of 0°F (-18°C), a battery's capacity will be reduced to about 40% of its rated
capacity.
12.5
BATTERY AGE:
As a battery is used, some of the active material on the battery plates will deteriorate and
become useless. As the battery gets older, there will be less and less useful material left
on the plates and the operating time will become noticeably shorter. A battery will age
faster (loose active material from its plates faster) if it is deeply discharged regularly, if it is
left in a discharged state for extended periods of time, or if it is repeatedly overcharged.