Inverter Powering Converter No Loop Test UPDATE
Updated here in OP with results of same test using 100amp PowerMax with variable voltage.
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Simulated external box with batteries and inverter, RV shore power cord into box's inverter, no batts in the RV, use converter to make the 12v you need
Test in trailer with batt disconnect open, Trimetric to measure amps.
First amps is 7355 converter at 13.8v/ then PM converter at 13.6v.
A. inverter on, no 120v loads, no 12v in rig--0.7a/ 0.6a
B. turn on converter, 12v in rig, fridge on propane-5.2a/6.1a
C. add 120v CFL lamp -6.1a/7.0a
D. add double 12v lamp-9.7a/11.0a
E. add rangehood fan-12.3a/13.6a
F. add turn on tap, water pump on-17.9a/19.8a
I suppose you could use a lower voltage converter than the 13.8v 7355. Rig 12v only needs maybe 11.5v to run things? Of course the amps come from the batts in the external box and that would have solar on it during the day.
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I tried the PowerMax for B. above, at three converter voltage levels, setting the pot to get that voltage:
1. 13.6v--6.1a
2. 12.0v--5.7a
3. 14.7v--6.4a
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I previously posted the amps test results for when you forget and leave the converter on and there is a loop (don't do that! :) )
I am not proposing doing things that way, but wanted to know how it would work. ( I would likely have a battery in the rig for the 12v stuff, leave the converter off, and just get my 120v from the external box. I would use my 120v CFL lamps instead of 12v for lighting too.)
-----------
Simulated external box with batteries and inverter, RV shore power cord into box's inverter, no batts in the RV, use converter to make the 12v you need
Test in trailer with batt disconnect open, Trimetric to measure amps.
First amps is 7355 converter at 13.8v/ then PM converter at 13.6v.
A. inverter on, no 120v loads, no 12v in rig--0.7a/ 0.6a
B. turn on converter, 12v in rig, fridge on propane-5.2a/6.1a
C. add 120v CFL lamp -6.1a/7.0a
D. add double 12v lamp-9.7a/11.0a
E. add rangehood fan-12.3a/13.6a
F. add turn on tap, water pump on-17.9a/19.8a
I suppose you could use a lower voltage converter than the 13.8v 7355. Rig 12v only needs maybe 11.5v to run things? Of course the amps come from the batts in the external box and that would have solar on it during the day.
-------------
I tried the PowerMax for B. above, at three converter voltage levels, setting the pot to get that voltage:
1. 13.6v--6.1a
2. 12.0v--5.7a
3. 14.7v--6.4a
-------------------
I previously posted the amps test results for when you forget and leave the converter on and there is a loop (don't do that! :) )
I am not proposing doing things that way, but wanted to know how it would work. ( I would likely have a battery in the rig for the 12v stuff, leave the converter off, and just get my 120v from the external box. I would use my 120v CFL lamps instead of 12v for lighting too.)
