Terms of Use

1Agreement to these terms

These Terms of Use (“Terms”) are a legal agreement between you and Zydeno, the developer of Sunpitch (“we”, “us”). They apply to the Sunpitch app for Android, its updates and everything it shows or produces (together, “the app”). By installing, opening or using the app you accept these Terms. If you do not accept them, do not use the app and uninstall it.

The Privacy Policy explains how the app handles data and forms part of these Terms. If we offer optional features under additional terms in the future, for example paid features, those terms will be shown to you before you accept them and will apply together with these Terms.

You must be old enough to enter into a binding contract where you live, or use the app with the consent and supervision of a parent or guardian who accepts these Terms for you. If you use the app for an organisation, you confirm that you may accept these Terms on its behalf; the consumer-protection provisions of these Terms apply only to consumers.

2Who provides Sunpitch

Sunpitch is developed and published by Zydeno (“we”, “us”), an independent developer. Contact: support@zydeno.com, website zydeno.com.

The app is a planning tool for adults. If you are under the age of majority where you live, use it only with the involvement of a parent or guardian.

3What Sunpitch is

Sunpitch is a planning aid for solar panels. You choose a site, the app downloads public solar and temperature data for it, and then it estimates the yearly and monthly energy of the panel arrays you describe, shows the Sun’s path against the horizon and obstacles you enter, compares up to several variants, and compares the module and inverter values you type in (for example open-circuit voltage at a low temperature against a maximum input voltage). It lets you save sites and export them as PDF, CSV and data files. It has no ads and needs no account.

Free. No ads, no tracking, no account.

The current version of the app is provided at no charge and has no ads or in-app purchases. This describes the current version only; see §15 for how this may change.

4Results are estimates, not professional advice

Yield figures describe a typical year built from long-term satellite and reanalysis data, scaled to monthly means and adjusted by the app’s own model. No real year looks like a typical year: weather varies from year to year and from season to season, and the data is a model of a grid cell, not a measurement at your roof. Shading, snow, dirt, ageing, wiring and inverter behaviour, and tolerances in real equipment all change the result. The horizon and obstacles are what you entered, with the simplifications of the model. The lowest temperature used in the string check is taken from a gridded archive; local minimums, such as in a valley, can be lower. You may enter your own temperature and the app marks the margin it adds.

The app is not engineering, energy-consulting, electrical, financial, legal or other professional advice, and it does not replace a site survey, a design by a qualified installer, or the manufacturer’s documentation.

5Electrical connection and the string check

Installing, connecting and putting PV equipment into service involves risks of electric shock, fire and falls, and is regulated. It must be done by a qualified electrician, following the installation instructions of the equipment makers and the rules that apply where you live. Rules differ between countries and change over time. As examples only, and without describing their content, such rules can include IEC 60364-7-712 / VDE 0100-712, VDE 0100-551 and NEC Article 690.

Sunpitch gives no instructions for mounting or wiring. It does not choose cable sizes, fuses, residual-current devices, earthing or lightning protection, and it does not tell you that you may connect equipment yourself. The “cable loss” helper only estimates energy lost in a cable from the length and cross-section you enter. Cable size, current rating and protection must be chosen by a qualified electrician under local rules. A range of module counts in a string is a statement about the numbers you entered, not a recommendation.

6Local rules, money and plans

Many countries limit plug-in solar systems. Check the current rules of your country and your grid operator. The app does not contain legal limits for any country and does not tell you what is allowed, registered or permitted where you live. Power presets are only numbers.

Sunpitch shows energy in kilowatt-hours and shares in percent. It does not calculate costs, savings, payback, returns, tariffs, subsidies, taxes or loans, and nothing in the app or its exports is financial advice or a basis for a purchase, investment or credit decision. Decisions to buy, build or invest are yours alone.

7Your responsibility

You are responsible for:

• entering module, inverter and site values from reliable sources (the datasheets), in the units you selected, and understanding that errors or missing values change the result;
• checking every value on screen and in any PDF or CSV against the datasheets and your own survey before you buy, build or connect anything;
• having the installation designed, installed, inspected and connected by qualified people, and following the rules of your country, your building owner, your insurer and your grid operator;
• working safely on roofs and around electrical equipment. Do not use the app while working at height or on live equipment;
• the decision to buy or build, and the cost of equipment, time and any part that turns out wrong, including work done for customers or other people;
• keeping your own backups (see §10).

8Not professional advice; no safety-critical use

The app is a tool to help you plan and calculate. It does not give professional, engineering, legal or other expert advice, and using it does not create a professional relationship with us. You remain responsible for your inputs, for how you interpret the results and for what you decide to do.

Do not use the app as the only basis for a decision where an error could cause death, personal injury, damage to property or the environment, or legal or financial loss, and do not use it in a safety-critical system, in an emergency or to control equipment. Do not use the app while working at height or on live equipment.

9Licence to use the app

Subject to these Terms, we grant you a limited, personal, revocable, non-exclusive, non-transferable and non-sublicensable licence to download, install and use the app on Android devices you own or control, for your own purposes (including your own projects, projects for others and your own small business). The app is licensed to you, not sold.

Except where these Terms, an open-source licence or mandatory law allow it (for example decompiling for interoperability where the law permits), you may not: copy, modify, translate or create derivative works of the app; decompile, disassemble or reverse-engineer it; rent, lend, sell, sublicense, distribute or publish it, or make it available for use by others over a network; remove or change any copyright, trademark or legal notice; or get around any technical limit of the app, including any future purchase, licence or advertising mechanism.

Open-source components and fonts in the app are licensed under their own licences, listed in the app under About → Open-source licenses. Those licences prevail for those components, and nothing in these Terms limits the rights they give you.

10Your data and backups

Your sites, variants and settings are stored only on your device. You own them. We do not have a copy and cannot recover them if you lose your phone, uninstall the app, clear its storage or use “Delete all data”. Use “Export data” in Settings to keep your own copy. The app sends rounded coordinates and, for the place search, the text you type to PVGIS and Open-Meteo to fetch data; see the Privacy Policy for exactly what is sent.

The designs you create, and the PDF, CSV and data files you export from your own input, are yours to use, subject to the attributions in §11 for the data they contain. We claim no rights in them.

11Data sources and attributions

Sunpitch needs an internet connection to download data for a new site, and works offline with data it has already cached. The data comes from public services that we do not operate. They can be slow, change, return errors, have no coverage for your location or stop working, and we are not responsible for that.

Open-Meteo’s free service is offered for non-commercial use. The current version of Sunpitch is provided free of charge, without ads and without accounts. Sunpitch is an independent app and is not affiliated with, sponsored by or endorsed by the European Commission, the Joint Research Centre, Open-Meteo, GeoNames, Copernicus or ECMWF. Their names are used only to say where data comes from.

If you pass on a PDF or CSV that contains this data, keep the attributions that are written in it.

12Fonts and open-source components

Sunpitch is built with open-source software and a font, shown in the app under About, Open-source licences:

The font and libraries remain the property of their authors. Nothing in these Terms limits the rights those licences give you for those components. The calculations in Sunpitch are our own implementation of published methods; the app contains no module or inverter database from manufacturers, and the example values are made up and do not describe any real product.

13Acceptable use

You agree not to:

• use the app in breach of any law or of other people’s rights;
• send automated or excessive requests to the data services through the app, or try to get around their limits;
• remove or hide legal notices or attributions, or present the app’s output as a certified, engineered or professional service;
• copy, modify, redistribute, sell or reverse-engineer the app, except as allowed by law or by an open-source licence;
• use the app where a mistake could endanger life or safety without independent checks of your own.

14Intellectual property

The app, its design, text, icon and the name Sunpitch belong to the developer, except for the open-source components, the font and the third-party data above, which belong to their owners. Other names are used only to describe things and belong to their respective owners.

15Price, payments, ads and future paid features

Current version. The current version of Sunpitch is provided free of charge, without ads and without in-app purchases or subscriptions. This describes the current version only. It is not a promise that the app, or any feature of it, will remain free of charge or free of ads.

Possible changes. We may at any time introduce advertising; offer paid features, in-app purchases, subscriptions or a paid edition; change which features are free; and set or change prices. Features that are free today may require payment in a future version. We will describe such changes in the store listing and release notes, and in the Privacy Policy where they affect data.

Purchases. Any purchase will be made through Google Play and processed by Google under the Google Play Terms of Service and its payment policies. Prices are shown in Google Play before you buy, including taxes where applicable. Subscriptions renew automatically until you cancel them in Google Play; cancelling stops future renewals. Refunds follow Google Play’s refund policies and your mandatory consumer rights, such as the right of withdrawal in the EU and the UK. Where you ask for immediate access to digital content during a withdrawal period, you may lose that right to the extent the law allows, and you will be asked to confirm this before you buy. You are charged only if you choose to buy something.

Ads. If the app shows ads, they are supplied by third parties. We are not responsible for the content of ads or for the products and services advertised, and any dealings with advertisers are between you and them.

Price changes. We may change prices for future purchases at any time. For an active subscription, we will announce a price increase as Google Play and the law require, and you can cancel before it applies.

16Disclaimer of warranties

To the maximum extent permitted by law, the app and everything it produces are provided “as is” and “as available”, without warranties of any kind, express or implied, including warranties of accuracy, correspondence between estimated and real energy output, availability or correctness of third-party data, reliability, fitness for a particular purpose, merchantability and non-infringement. We do not warrant that the app is free of errors, that a plant will produce what the app estimates, that a string will behave as the numbers suggest, or that the app will work on every device or Android version.

17Limitation of liability

To the maximum extent permitted by law, the developer is not liable for any indirect, incidental, special, consequential or punitive damages, or for damage to modules, inverters, batteries, buildings, vehicles or other equipment, fire, electric shock or other injury caused by installation or connection work, lower than estimated energy output, the cost of equipment, labour or installation, delays, loss of data, lost profits or business losses, arising from or related to the app, its output, third-party data or decisions based on them, even if we were told such damage was possible. Where liability cannot be excluded, it is limited to the extent the law permits.

18Your rights as a consumer

If you use the app as a consumer, you benefit from the mandatory consumer-protection rules of the country where you live, and nothing in these Terms affects them. In particular:

• EU and EEA: your statutory rights, including those on the conformity of digital content and digital services under the national rules implementing Directive (EU) 2019/770 where they apply, and mandatory product-liability rules, remain unaffected.
• United Kingdom: your statutory rights, including under the Consumer Rights Act 2015, remain unaffected.
• Australia: our services come with guarantees that cannot be excluded under the Australian Consumer Law. Where the law allows us to limit our liability for failing to meet a consumer guarantee for services that are not of a kind ordinarily acquired for personal, domestic or household use, our liability is limited to supplying the services again or paying the cost of having them supplied again.
• New Zealand: if you acquire the app for business purposes, you agree that the Consumer Guarantees Act 1993 does not apply, to the extent the law permits.
• United States and Canada: some states and provinces do not allow the exclusion of implied warranties or the limitation of incidental or consequential damages, so some of the exclusions above may not apply to you. In Québec, the mandatory provisions of the Consumer Protection Act apply.

19Indemnity

To the extent permitted by law, you agree to indemnify and hold harmless the developer against claims, liabilities, damages, losses and reasonable costs, including reasonable legal fees, brought by third parties and arising out of (a) your installations and projects, including work for customers, (b) your breach of these Terms, (c) your violation of any law or of the rights of others, or (d) output of the app that you provide to another person, such as a client or employer. This does not apply to the extent a claim is caused by our own breach of these Terms or our negligence, or where local consumer law does not allow it.

20Changes, availability and termination

To the extent the law allows, we may change, update, add or remove features, change data sources, and suspend or discontinue the app, in whole or in part or in any country, at any time. Data sources may change or end, and parts of the app may then stop working or show older cached data. We are not obliged to provide updates, maintenance or support, except where mandatory consumer law requires updates to keep the app in conformity.

You may stop using the app at any time by uninstalling it. Your licence ends automatically if you materially breach these Terms, and we may end or suspend it where the law requires. When it ends, you must stop using the app and uninstall it. Your data stays on your device under your control, so export what you need first.

Provisions that by their nature should continue after these Terms end continue to apply, including those on intellectual property, disclaimers, limitation of liability, indemnity, governing law and general provisions.

21Google Play

You obtain the app through Google Play. Your download, and any purchase you make, is also governed by the Google Play Terms of Service and Google’s policies. Where these Terms conflict with Google Play’s terms on the distribution, billing, refunds or licensing of apps obtained from Google Play, Google Play’s terms prevail to the extent of that conflict.

These Terms are between you and the developer only, not Google. Google is not responsible for the app or its content and has no obligation to provide maintenance or support for it. Android and Google Play are trademarks of Google LLC.

22Governing law and disputes

These Terms, and any dispute or claim arising out of or in connection with them or the app, including non-contractual disputes, are governed by the law of the country in which the developer is established, without regard to its conflict-of-laws rules. The United Nations Convention on Contracts for the International Sale of Goods does not apply.

The courts competent for the place where the developer is established have jurisdiction. If you are a consumer, you keep the protection of the mandatory provisions of the law of your country of residence, and you may bring proceedings in the courts of that country where that law allows it.

Before starting formal proceedings, please write to support@zydeno.com and give us at least 30 days to try to resolve the issue informally. This does not affect any time limit that applies to you by law or your right to use an alternative dispute-resolution body available to consumers in your country.

23General provisions

• Entire agreement. These Terms, the Privacy Policy and any additional terms you accept for optional features are the entire agreement between you and us about the app.
• Severability. If a provision is found invalid or unenforceable, it applies to the maximum extent permitted and the rest remains in effect.
• No waiver. Not enforcing a provision is not a waiver of the right to enforce it later.
• Assignment. You may not transfer your rights or obligations under these Terms. We may transfer ours, for example together with the app to another developer; where the law requires, this will not reduce your rights as a consumer.
• Events beyond our control. We are not responsible for failure or delay caused by events beyond our reasonable control, such as outages of networks, devices or third-party services, natural disasters or acts of authorities.
• Export and sanctions. You agree to use the app in compliance with applicable export-control and sanctions laws.
• No third-party rights. No one other than you and us may enforce these Terms.
• Notices. We may give notices in the app, in its store listing or release notes, or on this page. You can send notices to support@zydeno.com.
• Language. These Terms are written in English, which is the binding version. A translation, if offered, is for convenience only, unless the law of your country requires otherwise.

24Changes to these terms

We may update these Terms, for example when we change the app, introduce ads or paid features (§15), or when the law changes. The effective date and version at the top of this page show which version applies, and the version history (§25) summarises the changes.

For material changes we give reasonable notice before they take effect, for example in the release notes or in the app. If you keep using the app after the changes take effect, you accept the updated Terms; if you do not agree, stop using the app and uninstall it. Changes do not apply to disputes that arose before they took effect.

25Version history

26Contact

• Developer: Zydeno, the developer of Sunpitch on Google Play
• E-mail: support@zydeno.com
• Website: zydeno.com

See also the Privacy Policy.