Question for Dometic owners

[WK2JT]

This is a relatively new app update where they separated power and temp into two graphs. I think it needs updates. The amp scale is likely dynamic and the values will change based on the span of high and low amp usage. There are 6 values they divide the range into.

Thanks for the validation. Like the OP, I’m usually smarter than this, but this graph made me feel stupid. Like what am I missing.

Sponsored

 

[JTGuy]

4 amps at 12 volts is 48 watts. That's about right .

 

[MPMB]

Jumping on this thread to compare numbers...

I have a 35L BougeRV fridge. Never done a power consumption test. Did an informal one.

Yesterday afternoon around 4pm, I plugged it in to my River w/ the extra battery - 576W. I used the A/C adapter. It was at 94%. 95*H yesterday, and I'd say the garage was that hot well into the evening. Fridge is empty, I know if it's full it'll perform better. I just want to know the worst case.

At 7pm, the fridge was at temp, and the River was down to 77%.

At 9pm, the fridge had brought the River down to 66%.

At 6am, the River was at 0% and when I powered up the fridge it was 62*, so I'm guessing around 3-4am the battery died.

At max power to cool, the fridge drew 37W, so it should have run for 15 hours, optimally (576W / 37W = 15.5) at the most. Since I only had 94% battery, it would have been about 13 hours, but it didn't even manage that. Based on my assumptions, the fridge used just under 50W per hour.

I'm testing it again, a little different now, since it's at temp. I'll see what it is through the day. If it truly uses 50W/hour, then the battery should be 0% around 8pm.

Then I'll dig out the 12V plug and see how the power goes with that.

I also picked up a cheap Euhomy fridge, it was on sale on AMZN for less than $120. It's a 19L, small enough to fit in the back of the Hiker trailer. On initial powerup, it was running 50W on MAX to cool. I'm letting it sit, per instructions, before I let it run for a day testing it.

Edit: Because inquiring minds want to know. Around 9am I ran the BougeRV fridge, at cooled temp, instead of starting at room temp. At 9PM, battery was down to 40%. Works out to 29W/hr on the A/C adapter. It's on the DC cord now, so we'll see how that performs.

The Euhomy I didn't do an observed test, but started at 40% battery, "room" temp, and cooling to 30*, I turned it on last night around 9pm; it lasted for probably 4-5 hours. I checked it around 9am this morning and battery was dead, but inside the fridge it felt about 50*-60*.

Sponsored