Calculationwith Evaporation Temp and A consumption

[stijnijssel]

I am trying to calculate how long a Danfoss BD compressor will be able to operate on a battery.
The battery says it has a Capacity of 15Ah.
the following numbers are given by danfoss:
http://www.secop.com/fileadmin/user_...esd100y302.pdf
I look at EN 12900 Household (CECOMAF) because i live in Europe and do everything in Celsius.
I dont seem to grasp how the Current consumption in A rises when the evaporation temperature rises. what does ''evaporation temperature'' mean in this case? i would think the lower the evap temperature, the higher the Amp consumption, because the compressor has to work harder for it. It is a Fixed speed Compressor BTW.


I hope someone is able to clear this up for me a bit.