OP
delleray
Interesting thing, that power halver, though I'd wait to see how much the 3kW one is as it would mean the standard/existing element could be used......
I have used a single diode out of a MB356 BRIDGE RECTIFIER 35 Amp 600V (£2.79 posted from polarity_electronics_uk on ebay ) to halve my 3Kw immersion load. Its AC input feed is relay switched in with a wireless remote when the output from the PV exceeds fixed amount.
It gets warm but not hot as it's only having to dissipate < 10W so is mounted in a double wallbox with cooker isolating fuse/switch.
A similar unit could be used to half feed a 750W oil filled radiator.
Will try the CT differential phase control technology mentioned elsewhere when I have time...
d.
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