I bought one of these on the weekend.
It' a 240 VAC, 1500 Watt Ceramic heater with 2 heat settings.
Inside it looks like this.
I found it be be very well built AND it was a cheap brand ($25 at Bunnings).
Essentially there are four elements connected in series. Each element measures 160 Ohms (when hot). Curiously, when stone cold, they measure 500 Ohms.
If I use them all in series I will only get about 600W which appears not to be enough going by other's experience.
The plan is to link the 2 outer connections (there are blue wires going there now) together and feed power to these and the centre. This will give an overall resistance of 160 Ohms.
Since that is way too much power from the 600 VDC system (2250 Watts), I will be PWMing (Pulse Width Modulation) power to the elements and ensuring I do not go over 1500W. I have the parts for a custom PWM controller so that's yet another project.
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