Email Kiwi Projects
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Spotted a number that needs checking?
Feedback is most useful when we can reproduce what you saw. You can also suggest a source or a home project you would like a calculator for.
Reporting a calculator problem
- The page address and the result you were checking.
- The inputs you used, such as area, region and system type.
- What looked wrong, and a source or example if you have one.
- Your browser or device if a control is not working.
Please leave out your street address, account numbers and other private details. If you share a quote or power bill, remove names, addresses and account details first.
Project advice and quotes
We cannot provide a site assessment, installation quote or emergency trade service. Contact a qualified local installer for advice specific to your home.
Privacy questions
For privacy questions, email [email protected] and put “Privacy” in the subject line. See our Privacy policy for information about calculator inputs and correspondence.