Privacy policy
This policy covers energysizing.com. It explains what the site records when you visit, what the calculators do with your numbers, and which third parties set cookies on your device.
Quick answer
There are no accounts and no email list. Numbers you type into a calculator never leave your browser — the maths runs in your own device, not on a server. The only third parties are our host, our page counter and Amazon, and each one is named below.
What we do not collect
No registration, no login, no newsletter. We do not ask for your name, address, phone number, email address or utility account. We do not run a comments section, so there is nowhere on this site to leave personal details.
We do not ask for your address in order to estimate sun hours. The calculator works from a regional average you pick, or from numbers you type yourself, and it does not need to know where you live.
We do not sell data, because we do not hold the kind of data that is worth selling.
What the site records
Calculator inputs stay on your device. The calculator files are plain files served with the page. The arithmetic happens in your browser using a script on your own machine. Nothing you type is transmitted, saved to an account, or attached to an identifier.
Server logs. Our host, Cloudflare, keeps standard request logs for security and abuse prevention. Those logs include the requested page, the time, and network-level details such as IP address. They are operational records, not marketing profiles, and we do not combine them with anything else.
Aggregate page counts. We use Google Analytics 4 to count visits and see which pages are read. It records things like page views, approximate location from your IP address, device type and referring site. We use it to find out which calculators people actually use, not to identify anyone.
Cookies and analytics
A cookie is a small file a site stores in your browser. This site sets none of its own for tracking. The cookies you may receive come from the services below, and each is described by what it is for.
| Source | Purpose | Set by |
|---|---|---|
| Google Analytics 4 | Counting page views and which pages are read | Google, on our behalf |
| Cloudflare | Keeping the site online and blocking abusive traffic | Cloudflare, on our behalf |
| Amazon | Crediting a visit to the referring site and keeping a cart | Amazon, on Amazon's pages |
Google Analytics is configured to respect your browser's do-not-track style signals where the platform supports them. If you would rather not be counted at all, the official Google Analytics opt-out browser add-on blocks the measurement on every site that uses it, including this one.
Amazon affiliate links
Some links on this site go to Amazon. Those links carry an identifier so Amazon knows the visit started here, which is how the commission works. The full explanation of the commercial arrangement is on our disclosure page.
Once you arrive on Amazon's site, Amazon's own privacy notice applies to what you do there. It sees your order, your delivery details and your payment method. We do not. What reaches us is a summary report of clicks and orders with no personal details attached.
Leaving this site is the moment our control ends. That is worth knowing before you click, and it is why we do not pretend to be a shop.
Your choices and rights
You can block cookies in your browser, use the analytics opt-out above, or browse the site with a tracking blocker. The calculators will keep working, because they do not depend on any of it. This site has no paying tier and no feature that is withheld if you decline to be measured.
Under California law you have the right to know what personal information a business holds about you, to have it deleted, and to opt out of its sale. We hold no personal profiles and have never sold information, so in our case the last two are already true. If you believe we hold something about you, write to us and we will look.
We do not knowingly collect anything from children. The site is written for adults making a purchase decision about a house, and it has no feature aimed at anyone younger.
Questions people ask
Do you store the numbers I enter in the calculator?
No. The arithmetic runs in your browser, and the values exist only in the page you are looking at. Reloading the page resets them.
Do you know my address or my electricity bill?
No. We never ask for either. If you want a regional sun figure you pick a region yourself, and no address is transmitted.
Is there a mailing list?
No. There is nothing to subscribe to, so there is no list to be added to or sold.
Can I use the site without being counted?
Yes. Block cookies, or install the analytics opt-out add-on linked above. Every calculator keeps working.
What happens to my data after I click an Amazon link?
It becomes Amazon's data under Amazon's privacy notice. We receive aggregate counts, not identities or order contents.
Changes and sources
This policy was first published on 2026-11-02. When a service changes, this page changes with it and the date at the foot of the page moves. If a change ever widens what we collect, we will say so in plain language rather than adding a clause nobody reads.
This page is a description of our practices, not legal advice. Who operates the site is on the about page, and the conditions of use are on the terms page. The rules behind it are public and worth checking:
- California Attorney General, California Consumer Privacy Act. Read 2026-11-02.
- Federal Trade Commission, Privacy and data security guidance. Read 2026-11-02.
- Google, Google Privacy Policy. Read 2026-11-02.