I'm looking into the possibility of getting some solar panel for hot water
heating and I've just got some rough costings that seem to point pretty
clearly toward it & would appreciate comments.
The basics are that I can get a system installed for $NZ4000 and get an
interest free loan over a 3 year term to cover it.

The Figures are :-

Monthly Power Bill (averaged over year) - $250
% spent on water heating 66% Estimated (will have to look into this) = $165
/ month water heating costs
% Replaced by solar panel (according to the shop)  - 66%
= $108.9/month saved.

$4000 over 3 years, interest free = $111 / month.

i.e. After 3 years at my current costs I will get 67% free hot water. If
the price of power increases I will start saving sooner.

Any comments on the figures? - particularly the claim wrt 66% power
reduction in hot water heating using the solar panels.

Incidentally, these are standard panels, no heat pipes or evacuated tubes,
just black panels with a glass cover.

Richard P

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