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Old 06-24-2019, 03:33 AM   #1
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5 amps EMS vs 30 amps BMS???

My 07 Monaco Knight has an EMS panel showing 5 amp draw however my Bogart BMS panel is showing -30amps. How can they be so different?
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Old 06-24-2019, 07:48 AM   #2
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ac amps vs dc amps!

5 ac amps @ 120 volts = 600 watts
30 dc amps @12 volts = 360 watts

most likely some other 120 device is consuming some 120 volt ac amps. this consumption would not be reflected on the 12 volt monitor
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Old 06-24-2019, 07:49 AM   #3
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Is one showing / comparing charge vs discharge and one only discharge.
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Old 06-24-2019, 08:37 PM   #4
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The Intellitec EMS is labeled Load....5 amps load. The Bogart BMS shows the net effect of charging amps in minus load amps out.
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Old 06-25-2019, 08:40 AM   #5
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Yes, the EMS is showing the total load in 120vac amps. The Bogart is showing net 12v amps in/out of the battery bank. Two different numbers, so hardly surprising they are unalike.



For example, if that 5A @120v input load was solely converted to battery amps, it would yield about 60A@12v. However, some of that 5A is probably going to drive the fridge, maybe heating some water, running a clock, lighting up the microwave display, whatever. Only part of it is producing DC amps via the converter/charger. The Bogart says there is a net 30A difference between 12v in and 12v out.
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