Inverter Pure Sine Size

Just checked our Sunbeam VS-550, Cruiser, and it's 150w.

Bob

Aldi One is 120W. So 300 watt inverter should work it ok.

Won't the bigger inverter more drain your batteries quicker? Are you better having one just big enough to meet your needs for this reason or do the newer Pure sine wave units only draw power according to the load on them?

Alby
Apart from their own internal circuitry each inverter drawa power according to it's load. Maybe the bigger one under load is more efficient at switching and converting 12v to 240 and so will use less power with the same load.

I would always fit one with a battery isolator so it isn't electrically connected until required.

Big unit doesn't use much more than a smaller idling, my unit has an on off switch, would only draw a few millamps when turned off.

Thanks for the heads up, I am looking to purchase a unit and was looking at the smaller end of the scale (300w) so that it wasn't too hard on my batteries
I may as well go bigger then as they are not much more expensive

.
Alby, although a larger inverter will not waste much more power on small loads, unless you forsee a need for a large inverter you may do better with a 300W size. It is cheaper to purchase and smaller to carry.
Large (1000W) inverters when supplying large loads use a lot of battery power (80A). Unless the alternator is running this can soon deplete your battery and take considerable time to recharge it.

Whatever size you purchase, be sure it is Pure Sine Wave as any other type will likely not work with some of your loads.