Magnum Energy MS-G Series - Manual (Page 70)

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Appendix C – Power Consumption & Output Waveforms
Appendix C – Power Consumption & Output Waveforms
C-1 Appliances and Run Time
The MS-G Series inverter/charger can power a wide range of household appliances including small
motors, hair dryers, clocks, and other electrical devices. As with any appliance using batteries for
power, there is a certain length of time that it can run – this is called “run time.” Actual run time
depends on several variables including the size and the type of appliance, the type of batteries
installed in your application, as well as the battery’s capacity and age. Other factors such as the
battery’s state of charge and temperature can also affect the length of time your appliances can run.
Appliances (TVs, VCRs, stereos, computers, coffee pots, incandescent lights, and toasters) can all
be successfully powered by your inverter. Larger electrical appliances, however, such as stoves,
water heaters, etc., can quickly drain your batteries and are not recommended for this application.
All electrical appliances are rated by the amount of power they consume (see Table C-1). The
rating is printed on the product’s nameplate label, usually located on its chassis near the AC
power cord. Even though it is diffi cult to calculate exactly how long an inverter will run a particular
appliance, the best advice is trial and error. Your MS-G Series inverter has a built-in safeguard
that automatically protects your batteries from over-discharge.
Info: For optimum performance, a minimum battery bank of 200 AH is recommended
for moderate loads (<1000W) and greater than 400 AH for heavy loads (≥1000W).
Table C-1, Typical Appliance Power Consumption
Device Load Device Load Device Load
Blender 400W Coffee Maker 1200W Light (Flo) 10W
Computer 300W Color TV 150W Light (Inc) 100W
Drill 500W Hair Dryer 1000W Microwave 1000W
Hot Plate 1800W Iron 1000W Refrigerator 500W
TIME
VOLTAGE
40
80
0
120
40
160
200
80
120
160
200
Modified
Sine Wave
Sine Wave
Square Wave
Figure C-1, AC Waveforms
C-2 Output Waveform
The inverter’s output waveform is the shape of the wave that alternating current makes as its
voltage rises and falls with time (see Figure C-1 below). The three basic output waveforms are:
• Modifi ed Sine Wave – Also referred to
as a “quasi sine wave” or a “modifi ed
square wave”. This output looks like a
one-step staircase and the waveform
changes its width to continually
provide the correct RMS output voltage
regardless of the battery voltage. Most
loads that run from a sine wave will
also run from a modifi ed sine wave.
However, things such as clocks and
furnace controllers may have trouble.
• Sine Wave – An AC waveform that
looks like rolling waves on water. It rises
and falls smoothly with time. The grid
puts out a sine waveform. Any plug-in
AC equipment will operate from a sine
wave output inverter.
• Square Wave – The simplest AC
waveform. Some types of equipment
behave strangely when powered from a
square wave inverter.