110v Residential fridge install

Almot wrote:

PNW_Steve wrote:

I don't know if there is any truth to it but I have heard that the Energy Star test standard imposes an ambient temperature for testing of 90F. If so, this would give a fair comparison between models but would not yield realistic numbers for most average consumers.

Yes and no. Energy consumption of any refrigerator is measured by simulating room temperature 70F with door openings by testing it at 90F without door openings.

To earn Energy Star label, it should consume annually no more than 7.056*AV + 198.72, where AV=(1.68*fresh food volume)+(1.73*freezer volume). This is for fridge-freezer combo with ice maker off. The formula was revised in 2008, earlier models were given Energy Star under more lax criteria.

Yes, average consumer won't learn much from energy label. KWH has to be measured in a particular trailer at particular ambient temps and pattern of use. Though average consumers with these boxes don't really care because they are either on grid or run generator every day.

0.68 KWH a day = 72 AH from battery, including inverter. Approximately. When it gets hotter, the numbers will be higher. Or if you cook a big pot of something and put it in after letting it cool down to room temperature (whatever room temperature is, on that day) - it will go higher again.

The fact that there are no noticeable changes when it's hot or when it's off, like traveling with windows closed, is due to inertia of big boxes. It will draw those additional KWH later on, to cool it down to where it was. And when you load warm items in there, it will need additional KWH again. If you take trailer from home, pre-cooled, with food loaded and also pre-cooled, travel some hours, camp a day or two, and then go home before it warms up again, it's different from living there semi-permanent.