SamplexPower Evolution Series Owner's Manual page 13

SECTIOn 1 |
The inverter should, therefore, be sized adequately to withstand the high inrush current and the
high Crest factor of the current drawn by the SMPS. Normally, inverters have short duration Surge
Power rating of 2 times their Maximum Continuous Power rating. hence, it is recommended
that for purposes of sizing the inverter, to accommodate Crest Factor of 3, the Maxi-
mum Continuous Power rating of the inverter should be > 2 times the Maximum Con-
tinuous rated Power of the SMPS. For example, an SMPS rated at 100 watts should be
powered from an inverter that has Maximum Continuous Power rating of > 200 watts.
Peak Inrush Current
Input Sine
Wave Voltage
TIME
1.4 generAL inForMAtion - LeAD ACiD bAtterieS
for complete background information on Lead Acid batteries and Charging Process, visit www.
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Safety Instructions & general Information
Input voltage
Inrush current
Fig 1.2 inrush current in an SMPS
Non-linear
Input Current
Fig 1.3 high Crest Factor of current drawn by SMPS
inFo
NOTE: Voltage and
Rated Steady State
Input RMS Current
Peak Current
RMS Current
CREST FACTOR = PEAK CURRENT = 3
RMS CURRENT
Current scales
are di erent
NOTE: Voltage and
Current scales
are di erent
SAMLEX AMErICA INC. | 13