Info

Ground to AC ?

Yes

Ground to DC Neg. ?

No

UL Listing?

These rows tell how you can get the power out of the inverter. In the old days, all inverters came with only female 120 vac output receptacles. Now a days we also have the better option of hardwiring the inverter to the 120 vac mains panel. Output GFI indicates if the inverter is available with Ground Fault Interrupting output. GFI is desirable if the inverter is used in a vehicle or any ungroundable situation.

Physical Dimensions

Here are the size and weight data for the inverter models. Note that the high frequency switchers are miniscule in both size and weight when compared with the lower frequency models.

Grounding

These rows tell you about the grounding schemes preprogrammed into the inverter by its maker. The NEC requires that the common leg (the white wire) be held together with ground (green or uninsulated wire). Grounding the inverters chassis to the 120 vac system ground (the green or uninsulated wire) meets NEC requirements of household wiring.

Holding the DC (battery) negative in common with ground is a hotly debated subject. Mariners and radio operators all have valid objections to grounding the negative battery pole in common with earth and the 120 vac ground. Experiences have shown that the user should make this decision himself. If you are seeking a low noise system with no electrolysis, then do not ground your battery negative to earth or to the 120 vac ground (which is, by NEC standards, grounded to the earth).

UL Listing

Some makers have taken the time and spent the money to receive Underwriters Laboratories (UL®), or other testing laboratory, listing of their inverter. While this listing doesn't consider critical user parameters like the inverter's output total harmonic distortion, wave form peak voltage, and wave form rms voltage, it does tell you that the inverter is not a fire hazard.

What got left out...

You may have noticed that there was no row detailing inverter efficiency. This is because

Inverters there is really no standard for inverter efficiency measurement. To date efficiencies have been measured using resistive loads (like heaters and light bulbs). Inverter user's point out that their appliances are primarily reactive (fluorescent lighting, motors, and the power supplies driving TVs, VCR, computers...). We need a real standard for the measurement of in service efficiency of inverters. Until this happens, printing efficiency figures is not meaningful.

Access

Author: Richard Perez, c/o Home Power, POB 520, Ashland, OR 97520 • 916-475-3179 voice or FAX.

Inverter Manufacturers:

Advanced Energy Systems (Skyline Eng.), POB 134, Temple, NH 03084 • 603-878-1600 • FAX 603-8784643

Dimensions Unlimited Inc, c/o RMS Electric, Inc., 2560 28th Street, Boulder, CO 80301 • 303-444-5909 • FAX 303-444-1615

Dynamote Corporation, 1200 West Nickerson, Seattle, WA 98119 • 206-282-1000 • FAX 206-283-7714

Exeltech, 7018 Baker Boulevard, Fort Worth, TX 76118 • 817-595-4969 • FAX 817-595-1290

Heart Interface Corporation, 811 1st Avenue South, Kent, WA 98032 • 206-859-0640 • FAX 206-859-3579

Omnion Power Engineering Corporation, 2010 Energy Drive, POB 879, East Troy, WI 53120 • 414-642-7200 • FAX 414-642-7760,

Pacific Inverter, Inc, 509 Granite View Lane, Spring Valley, CA 91977 • 619-479-5938 • FAX 619-479-1549

PowerStar Products, Inc., 10011 North Foothill Boulevard, #112, Cupertino, CA 95014 • 408-973-8502 • FAX 408-973-8573

Statpower Technologies Corp., 7725 Lougheed Highway, Burnaby, BC V5A 4V8, Canada • 604-4201585 • FAX 604-420-1591

Trace Engineering Inc., 5917 195th N.E., Arlington, WA 98223 • 206-435-8826 • FAX 312-644-6505

Tripp-Lite, 500 N. Orleans, Chicago, IL 60610 • 312329-1601 • 312-329-1777

Vanner Weldon, Inc., 4282 Reynolds Drive, Hilliard, OH 43026 • 614-771-2718 • FAX 614-771-4904

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