Terms of Use

Last updated: 18 May 2026

Who runs this site

TheGreenWatt (thegreenwatt.com, the "Site") is operated by Marko Visic, a sole proprietor based in Ljubljana, Slovenia. Contact: info@thegreenwatt.com.

What this site is

TheGreenWatt is a free educational website about solar photovoltaic systems. It contains interactive calculators, articles, charts, and reference data. There are no user accounts, no transactions, and no products for sale on the Site.

Acceptance

By accessing the Site, you agree to these Terms and to the Privacy Policy. If you do not agree, please do not use the Site.

Acceptable use

You may:

Read any article, use any calculator, and view any chart on the Site
Quote short excerpts (a paragraph or two) with attribution and a link back to the original page
Link to any public page on the Site

You may not:

Republish entire articles, or the contents of multiple articles, with or without attribution
Scrape, crawl, or systematically download the Site beyond ordinary browsing
Reverse-engineer the calculator formulas to create derivative tools without permission
Misrepresent yourself as the author or operator of any Site content
Use the Site to send spam, harass others, or attempt to compromise its security

Eligibility

The Site is not directed to people under 13 and we do not knowingly collect information from them. Please do not use the Site if you are under 13.

Accuracy disclaimer for calculators and data

The calculators on this Site are built on published formulas (primarily NREL PVWatts v8) and government data (EIA, NREL, EPA, DOE). Every reasonable effort is made to keep them accurate. However:

Calculator outputs are estimates, not engineering specifications.
Real-world solar production varies with weather, shading, panel degradation, inverter quality, installation choices, and many other factors not captured by a simple calculator.
Cost and incentive figures reflect U.S. market averages and may not apply to your location, utility, or installer.
Always consult a licensed solar professional before purchasing, installing, or modifying a solar system. Do not use these calculators as the sole basis for major financial, engineering, or safety decisions.

Intellectual property

NREL PVWatts data, U.S. government datasets (EIA, DOE, EPA), and other public-domain references remain the property of their respective publishers and are used under their public-domain or open-data terms.

DMCA & copyright complaints

If you believe content on this Site infringes your copyright, send a notice including the required elements under 17 U.S.C. § 512(c)(3) to info@thegreenwatt.com with the subject line "DMCA Notice." Your notice must include:

Identification of the copyrighted work claimed to be infringed
Identification of the allegedly infringing material with a URL
Your contact information (name, address, phone, email)
A statement of good-faith belief that the use is unauthorized
A statement, under penalty of perjury, that the information in the notice is accurate and that you are authorized to act on behalf of the copyright owner
Your physical or electronic signature

External links

The Site contains links to external websites (NREL, EIA, DSIRE, manufacturer datasheets, and other resources). We do not control those sites and are not responsible for their content, accuracy, or privacy practices.

No warranties

The Site is provided "as is" without warranties of any kind, express or implied, including warranties of merchantability, fitness for a particular purpose, and non-infringement.

Limitation of liability

To the maximum extent permitted by law, Marko Visic and TheGreenWatt will not be liable for any indirect, incidental, special, consequential, or punitive damages arising from your use of the Site, including any decisions you make based on calculator output or article content.

Nothing in these Terms limits liability that cannot be limited under applicable consumer-protection law — in particular, mandatory protections under EU and Slovenian consumer law.

Governing law and jurisdiction

These Terms are governed by the laws of the Republic of Slovenia. Any disputes arising out of or relating to the Site or these Terms shall be resolved in the competent courts of Ljubljana, Slovenia, except where mandatory consumer-protection law gives EU consumers the right to bring proceedings in their country of residence.

Changes

We may update these Terms. The "Last updated" date at the top of this page will change accordingly. Continued use of the Site after a change indicates your acceptance of the revised Terms.

Contact

Marko Visic — TheGreenWatt
Ljubljana, Slovenia (EU)
Email: info@thegreenwatt.com