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Author Topic: Which Solar sinewave inverter is quiet? (RF noise/hash)  (Read 2033 times)
N6YFM
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Posts: 500




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« on: November 02, 2017, 11:44:51 AM »

In putting together a small (field day and home use) Solar panel setup,
I also want to use a small pure sinewave inverter for the laptop power,
antenna rotator controller, etc.

I was thinking of using anywhere from a 600watt to a 1,000 watt model.

Has anyone else done this, and found any brand/model inverters that are
quiet on HF RF?  (Or that you have easily made so, with specific added filtering?)

Or, have you found any list or website where other people have identified
models that have been found satisfactory for use near HF Radio?

Thanks,

Neal
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K0UA
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Posts: 1348




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« Reply #1 on: November 07, 2017, 02:18:45 PM »

I don't have a quiet one, I have a Tripplite that generates hash from DC to daylight. It makes 600 watts of AC power, but you sure don't want your radio on...
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VE6FGN
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Posts: 45




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« Reply #2 on: November 07, 2017, 07:59:27 PM »

My Outback 2500 watt inverter is on 100% of the time, is about 10 feet (and two walls) away from the radio, and zero interference.

Good luck!
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K6BRN
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Posts: 451




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« Reply #3 on: November 13, 2017, 12:25:36 PM »

Neal (N6YFM):

You might consider the following:

Samlex SA-300-112 300W (400W peak), 12V Pure Sine Inverter (about $170 on line, may be able to do better)

This pure sine wave inverter has good reviews (https://www.amazon.com/Samlex-America-SA300112-300W-Inverter/dp/B003FFF41C#Ask), is the heavier duty, more efficient version from the Samlex line and has low idle current (0.24A - about 6 to 7 watts).

If you step up to a 600W inverter, part of the price will be much higher idle current draw (typically 0.87 to 0.9A - 11 to 12 watts), hence lower efficiency at low loads.  So if you can keep your AC loads below 2.5A, the 300 watt model may be a better way to go for a small battery operated, solar charged system where many of the main loads are native 12V anyway (like a radio, wattmeter, etc.).

Brian - K6BRN
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AE5GT
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Posts: 29




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« Reply #4 on: November 14, 2017, 02:12:31 PM »

I am using Xantrex on both the charge controller and inverter (inverter 700) . Last i checked Xantrex was part of Square D. never noticed any noise with either but my rotor and radios,PC ect were never more than 100 watts. 
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K6BRN
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Posts: 451




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« Reply #5 on: November 15, 2017, 10:48:40 PM »

Hmmmm....

Samlex has some pretty good reviews on their true sine wave inverters, which seem to come in 3 grades....

SA-600-12  "Industrial" grade, continuous duty, heavy, low 250 mA idle current draw, 5 out of 5 stars on Amazon, $160 to $170
PST-300-12  "Commercial" grade, 4.5 out of 5 stars, 450 mA idle current - Just bought one and put it into service, $142-$150
SSW-350-12A "Budget" grade, 3.5 out of 5 stars (not so good), $100-$1105

The PST-300 I've put into service today appears very well built, has a thermostatically controlled fan, is acoustically quiet and seems RF quiet as well, being one of the few fairly low cost FCC Part 15B, Class B certified inverters out there (also checked it myself - no significant noise into an AM radio or on the HF bands I operate on as a ham).  Waveform seems clean and everything I've plugged into it runs well, in contrast to the previous modified sine wave inverter I was using.  Much heavier and slightly bigger than old MSW converter.  However, idle current on the old inverter was only 150 mA.  It was quire noisy, however (fan always on) and some devices did not behave well when connected.

Brian - K6BRN
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K6BRN
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Posts: 451




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« Reply #6 on: November 15, 2017, 10:49:44 PM »

ERROR CORRECTION

"SA-600-12  "Industrial" grade, continuous duty, heavy, low 250 mA idle current draw, 5 out of 5 stars on Amazon, $160 to $170"

SHOULD BE

SA-300-12  "Industrial" grade, continuous duty, heavy, low 250 mA idle current draw, 5 out of 5 stars on Amazon, $160 to $170
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