Forum Discussion
BFL13
Mar 29, 2017Explorer II
Ha! Found my notes on that test of big vs small inverter.
It was a 150w MSW inverter in the Winegard 12v socket vs the 3000w MSW inverter up front by the battery bank.
Unplugged from shore power, no inverters connected, Trimetric -00.2a parasitic draw.
Turn on 150w inverter no load- now -00.3a (adds 00.1a) turn off.
Turn on 3000w inverter no load-now -00.4a (adds 00.2a) turn off.
Using 3000w only :
-turn on, get 0.4a as above, plug in shore power cord (no converter on) 0.5a, (branch breakers off) turn on branch breakers 0.7a (The GFCI receptacles seem to draw something even with nothing plugged in them)
Turn on the CFL bulb--Trimetric says 1.7 amps. (added 1 amp)
Take that bulb out and put in a regular 60w bulb--5.8 amps on Tri.
Using the 150w inverter in the 12v socket with shore power into the 150w inverter via extension cord into trailer.
150w on --0.2a as above turn it on 0.3a, plug in shore power main breaker only 0.3a, 20a breaker on too 0.4a, all breakers on 0.6a
Turn on CFL lamp, Tri now says 1.7a (same as with 3000w inverter) switch to regular 60w bulb-- 6.5 amps!
OK--sorry, it was the 60w bulb that showed the difference so much, with 5.8a on 3000w and 6.5a on 150w inverter. IAW the higher amps revealed the line loss with the 12v socket.
It came out the same with just the CFL, so there was no advantage in using a smaller inverter in that test with the smaller load.
It was a 150w MSW inverter in the Winegard 12v socket vs the 3000w MSW inverter up front by the battery bank.
Unplugged from shore power, no inverters connected, Trimetric -00.2a parasitic draw.
Turn on 150w inverter no load- now -00.3a (adds 00.1a) turn off.
Turn on 3000w inverter no load-now -00.4a (adds 00.2a) turn off.
Using 3000w only :
-turn on, get 0.4a as above, plug in shore power cord (no converter on) 0.5a, (branch breakers off) turn on branch breakers 0.7a (The GFCI receptacles seem to draw something even with nothing plugged in them)
Turn on the CFL bulb--Trimetric says 1.7 amps. (added 1 amp)
Take that bulb out and put in a regular 60w bulb--5.8 amps on Tri.
Using the 150w inverter in the 12v socket with shore power into the 150w inverter via extension cord into trailer.
150w on --0.2a as above turn it on 0.3a, plug in shore power main breaker only 0.3a, 20a breaker on too 0.4a, all breakers on 0.6a
Turn on CFL lamp, Tri now says 1.7a (same as with 3000w inverter) switch to regular 60w bulb-- 6.5 amps!
OK--sorry, it was the 60w bulb that showed the difference so much, with 5.8a on 3000w and 6.5a on 150w inverter. IAW the higher amps revealed the line loss with the 12v socket.
It came out the same with just the CFL, so there was no advantage in using a smaller inverter in that test with the smaller load.
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