Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

masterdrago · 02-19-2020, 05:10 PM

I say the OPs link is not correct in several ways.

I ran a test not long after getting our new 3791 home. On a 60 degree ambient temperature day running on only the 2 12 volt batteries (no shore power), our residential reefer ran over 32 hours b4 the battery voltage dropped to 10.5 and the inverter kicked off. This test is extremely hard on the batteries.

Replying to what retchief said.... while running on the inverter, the wattage ran from ~50-120 - that's watts not amps as displayed on the inverter. I never caught the reefer in defrost cycle which I'm guessing would be ~300-400 watts for a few minutes every 8-30 hours. I've worked on these reefers for years so that's a good "guess".

02-19-2020, 05:10 PM	#14
masterdrago Montana Master Join Date: Sep 2017 Location: Willis Posts: 896 M.O.C. #20587	I say the OPs link is not correct in several ways. I ran a test not long after getting our new 3791 home. On a 60 degree ambient temperature day running on only the 2 12 volt batteries (no shore power), our residential reefer ran over 32 hours b4 the battery voltage dropped to 10.5 and the inverter kicked off. This test is extremely hard on the batteries. Replying to what retchief said.... while running on the inverter, the wattage ran from ~50-120 - that's watts not amps as displayed on the inverter. I never caught the reefer in defrost cycle which I'm guessing would be ~300-400 watts for a few minutes every 8-30 hours. I've worked on these reefers for years so that's a good "guess". __________________ 2018 Montana 3791RD (SOLD) 2017 Ram 3500 DRW 6.7 Cummins Aisin, B&W RVK3600 (SOLD)