3kw Phoenix inverter VS dive compressor

DIY
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1

Hi there,

I have a victron system with a 3kw Phoenix inverter and am trying to run a 2.2kw Bauer Junior 2 dive compressor.

The compressor motor starts turning slowly, then stalls and the inverter trips out. Obviously the start up current is too high.

If I disconnect the compressor (remove drive belt) the motor starts up no problem. The compressor is unloaded and can easily be turned by hand.

I’m looking for an electrical solution, I could use a mechanical solution like some form of clutch engagement once motor is running for example.

I am wondering if any of the community has overcome the same issue or knows if there is a ‘soft start’ or other solution.

Thanks in advance.

2

Most electric motors have a power factor of 0.8. Real power = Apparent power × Power Factor. Apparent Power (VA) = 2200W x 0.8 = 2750VA Apparent Power (VA)= 0.8 2200W =2750VA

The Phoenix inverter is 3000VA, 2400w at 25 deg and 2200w at 45deg.Peak power 6000w.

I think once you get it going the power avaivale is marginal. You may need to look at the 5000va multiplus before you look at starting it. The 5000va might start it at 9000W peak. That will also be a massive draw on the battery if you are using 12V. You could use the 3000va into the 5000va and set the input to geneartor and some help using the generator assistant to start when the load is high.

Maybe others have tried running motors this close to the rating.

3

Just buy another 3000VA and use them in parallel mode

4

Thanks for the response. There are people who are successfully running the same compressor and motor off the same inverter, just need to figure out how. VSD and three phase motors seem to be the key.

Previously I ran it of a 4kva Trace inverter without issue.

5

You might try this product line

Schneider Electric Sanftanlasser ATS01N103FT IP20 Sanftstarter Sanftanlasser