The short version: the calculator runs in your browser and we never see what you type. We show ads from Google, which use cookies only after you agree where the law requires it. You can change that choice any time from “Cookie settings” at the bottom of every page.
Who we are
Blackout Calc (blackoutcalc.com) is run by DEV2REV, Porto, Portugal. We are the data controller for the limited data described here. You can reach us at hello@blackoutcalc.com.
What you type into the calculator
Every calculation happens on your device. Appliance, wattage, hours, sun hours, price and currency are not sent to our servers or stored by us, unless you share a link as described next.
If you press Copy link, your values are written into the web address so the result can be shared. Anyone you send that link to can see those values, and they may appear in their browser history and in our hosting logs when the link is opened.
Data collected automatically
Like any website, our host Cloudflare receives technical information when you load a page:
- IP address, browser type and device type
- The page requested, the referring page and the time of the request
We use these logs only to keep the site running and secure, and they are deleted within 30 days. We count visits with Umami, an analytics tool we host ourselves. It sets no cookies and does not store IP addresses.
Cookies and advertising
We show ads through Google AdSense to keep the site free. Third-party vendors, including Google, use cookies to serve ads based on your previous visits to this and other websites. Google's use of advertising cookies lets it and its partners show you ads based on those visits.
- You can turn off personalised advertising in Google's Ads Settings.
- Google explains how it uses data from partner sites at How Google uses information from sites that use its services.
- Visitors in the UK, EEA and Switzerland see a consent banner from Google's Privacy & messaging tool, a Google-certified consent platform. Advertising cookies are set only after you agree. Without consent, you may still see non-personalised or limited ads.
We also store one small preference in your browser: your light or dark theme choice. It is not a tracking cookie and never leaves your device.
Affiliate links
Some product links are affiliate links. If you click one, the retailer may set its own cookie to record that you came from us, so we can earn a commission if you buy. We don't receive your name or payment details. See our affiliate disclosure.
Your rights
Depending on where you live, including under the GDPR, UK GDPR and US state privacy laws, you can ask to access, correct or delete personal data we hold, object to processing, or withdraw consent. Because we hold so little, most requests are about advertising cookies, which you can change in Cookie settings.
Where we rely on consent, the legal basis is consent. For server logs, it is our legitimate interest in running a secure website. You can complain to your local data protection authority.
Children
This site is not aimed at children under 16 and we do not knowingly collect their data.
Changes and contact
If this policy changes, we will update the date at the top of this page. Questions or requests go to hello@blackoutcalc.com or the contact page.