"george [dicegeorge]" wrote in message
...
Immersion Water Heater Solar PV Relay Switch
to use electric immersion heater when the sun shines
and save on FIT electricity bills, is this a good idea?
and can anyone spot a difference between
£190 http://www.chrisrudge.co.uk/immersion.htm
and £31 http://www.reuk.co.uk/Water-Heating-...s-Solar-PV.htm
?


The cheap one doesn't monitor the incoming electricity - it just guesses
from the sunlight level if your system is generating enough power. Cheap but
it does work the immersion at full power. Sounds an interesting idea.

The expensive one monitors the power level from the PV array but will only
work with an 800W - 1Kw immesrion heater so doesn't heat the water very
quickly.

Wait six months for a better one to come along :-)

--
No plan survives contact with the enemy.
[Not even bunny]

Helmuth von Moltke the Elder

(\__/)
(='.'=)
(")_(")