motorhomeninja Posted July 22, 2020 Share Posted July 22, 2020 I'm thinking of installing a Truma Saphir Compact under bench air con. The reason for thinking of using this design is due to wanting to keep the skylights. The technical spec states a startup current draw of 15 amps for 150 ms and then a running amperage of 2.8 amps. My question is, would a surge of 15 amps for such a short time trip an EHU supply with a 5 or 6 amp breaker? I would be grateful for any info from anyone using one of these units? Link to comment Share on other sites More sharing options...
Charles Posted July 22, 2020 Share Posted July 22, 2020 Probably depends on the breaker. The ones rated C or D are motor rated and will tolerate start up surges. How much they will tolerate though, I don't know. Link to comment Share on other sites More sharing options...
Charles Posted July 22, 2020 Share Posted July 22, 2020 Look for ac systems with 'inverter driven' compressors they start up slowly with no surge and their speed is variable. All household ac systems are inverter driven now, actually they've been around 20+ years so surely they do a van one by now. Link to comment Share on other sites More sharing options...
Charles Posted July 22, 2020 Share Posted July 22, 2020 Here's one called the Harrier... https://www.dometic.com/en-nz/nz/products/climate/air-conditioners/air-conditioners-for-rvs/dometic-harrier-inverter-_-151990 Link to comment Share on other sites More sharing options...
colin Posted July 22, 2020 Share Posted July 22, 2020 Technically it should work if nothing else is running, as even B rated MCB's should withstand that overload in that time span, but that's the thing, what else will be running such as fridge and charger. Link to comment Share on other sites More sharing options...
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