"Norcold TEK II Dual Voltage Ice Box Conversion System, 120V AC and 12/24V DC, Model: SCQT-4407 (40W)" (copied from Owner's Guide)
I need to buy a stepdown transformer (not an inverter) to power my new Norcold fridge from 220V shore power
I would appreciate to know what wattage transformer would be appropriate please.
Local shop has 100W, 200W, 300W and 500W (and higher) transformers, and I reckon one of those should be ok. The fridge specs say it is 40W.
Am I correct to assume that this is same case as with inverters, wherein one should get a transformer 3 or 4 times the wattage of the appliance powered, due to higher start-up draw? And I guess one should not run the transformer at or near it's max wattage?
100W transformer is too small?
200W transformer maybe ok?
500W too big?
As this transformer will be used only from shorepower, the total amp draw is of no significance. (at sea the fridge is run from 12V DC)
At the moment I can not think of any other use for this transformer than to power the Norcold fridge when in marina and at shore power
. I do not have any other 110V appliances
or power tools so I can not think of a reason to "buy larger capacity for future needs". Any AC appliances/tools are and will be 220V.
However, what I would prefer is a safe and reliable transformer generating as little heat as possible.