300W
The varrox is about 150W, I believe. That is why yours is so much faster.
Mine is 150W, made a long time ago with three diesel glow plugs embedded in a machined aluminium base.
One glow plug must be very slow, or it is a high powerered one! Or perhaps the process is speeded a little by using anhydrous oxalic acid.
I would think that buying in ready pelleted oxalic about doubles the cost, or perhaps more? My half a kilo will more than last me out, I reckon, unless I go the Hivemaker route.
I saw earlier in the thread that it supposedly needs over 5Ah to sublimate one colony with a 12V battery. Did not get a response by return PM, so a heads up to all that may have been led up the garden path - it is only about a tenth of that figure!
RAB