I am looking for a used Multiplus or Multiplus Compact to have Powerassist for providing power in a shed 150 metres away, usually the powerdraw will be under 50W, to run bigger startup currents the likes of a truck battery should do the trick. I would like to know whats the lowest required wattage that needs to be provided via AC. I am hoping around 250W because the cable will only be 1.5 sqare mm and the volts might otherwise drop too far.
Or am I better off using a charger and Inverter individually?
I have a very old Multi which cannot provide Powerassist. How can I determine whether it is available with the unit in question when I see it in an ad?
Cheers