I want this tool to be accurate and useful. If you've spotted an assumption that's out of date — a changed subsidy rate, a different per-kW price in your area — or you just have a question, I'd like to hear it.
I read everything, though I can't always reply quickly. Please don't send confidential information — this is an informational site, not a vendor or advisor.
Tip: if you're asking about your own savings, run your bill through the calculator first — it'll answer most questions instantly.