The column of 12 three-digit numbers adds up to $2980. They rise from $173 to $376 then down to $190. That's my family's monthly electricity bills for the past year.
We also run a pellet fire for heating in winter and a gas hob for cooking, but $57 a week is still a reasonable weekly cost. Like many, we've wondered what difference solar panels on the roof could make.
There are plenty of companies wanting to sell you a package and promising savings, but what really is the truth?
I turned to a Christchurch expert on solar power, Enasolar general manager, Trevor Foster and pushed my scrap of paper and figures across the table.
from
http://www.stuff.co.nz/life-style/home-property/89392020/Should-you-put-solar-panels-on-the-roof-Its-complicated
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