Terms of service
These terms are the agreement between you and SunHarvest. You accept them when you create an account, and they apply whenever you use the service. They are written to be read. If anything here is unclear, email [email protected] before you rely on it.
1. The service
SunHarvest connects to a Tesla Powerwall through Tesla's Fleet API, with your consent. It shows what your system is doing and changes its settings according to the controls you use, the rules you write, or the AI plans you switch on.
SunHarvest is an independent product. It is not made, endorsed or supported by Tesla, Inc., Octopus Energy, or any AI provider or charger manufacturer it works with.
2. Your account
- You must be at least 18 and able to enter into a contract.
- Only connect a Powerwall you own or are authorised to control, through the Tesla account it is registered to.
- Keep your password and any recovery codes safe. You are responsible for what happens under your account.
- One Powerwall can be linked to one SunHarvest account at a time.
3. Controlling your Powerwall
This is the part to read carefully. When you use a control, enable a rule, or switch on AI mode, SunHarvest sends commands to your Powerwall on your behalf. These can change the backup reserve, operation mode, grid charging, export, Storm Watch, the off-grid vehicle reserve and the tariff the Powerwall uses, and can force the battery to export for a set time.
- You stay responsible for the settings you choose, the rules you enable and the AI plans you allow to run. Check the plan before switching AI mode on, and keep an eye on the change log.
- Settings affect your bills and your backup. For example, a low backup reserve leaves less energy for a power cut. A rule that charges from the grid costs money at the price of the moment.
- Things outside our control can stop commands arriving or change their effect: Tesla's servers, your internet connection, price feeds, weather forecasts and AI providers. SunHarvest cannot guarantee that any command, rule or plan runs at a particular time or at all.
- Figures are estimates. Forecasts, money figures and "saved" amounts are calculated from the data available and the tariff you enter. They are not a bill or financial advice.
SunHarvest does not replace the safety systems built into your Powerwall and your installation, and never tries to override them.
4. AI mode and your API keys
AI mode uses an AI provider account and API key that you supply. Your use of that provider is under your own agreement with them, including their charges, limits and data terms. SunHarvest stores your key encrypted and uses it only to make plans for your site. AI output can be wrong; the plan is shown to you so you can check it, and your own rules take over if planning fails.
5. Plans, payment and cancelling
- Monitoring and your own rules are free. Every new account gets a single 30-day trial of the full product, once per person and per Powerwall.
- Pro is a monthly subscription, paid through Stripe at the price shown at checkout. It renews each month until you cancel.
- You can cancel any time from Settings › Subscription. Pro continues until the end of the period you have paid for, and is not refunded part-way through a month, except where the law requires it.
- Deleting your account cancels Pro at once; the rest of the paid period is not refunded.
- If we change the price of Pro, we will tell you by email before it applies to your next renewal, and you can cancel before then.
- Free and trial accounts see advertising, as described in the privacy policy.
6. Acceptable use
Do not:
- try to access other people's accounts or systems
- probe, overload or disrupt the service
- reverse-engineer it to get around plan limits
- use automated means to create accounts or claim trials
- use SunHarvest to break the law or Tesla's terms for its API
Security researchers are welcome. Please report issues as described in our security.txt.
7. Your data
Your energy data is yours. How we collect, use and delete it is set out in the privacy policy, which forms part of these terms. You can delete your history or your whole account at any time from Settings › Data.
8. Changes and availability
We keep improving SunHarvest, so features may change. We aim to keep the service running but do not promise it will always be available or error-free. Tesla or other providers may also change or withdraw the interfaces SunHarvest relies on.
If these terms change materially, the version and date above change and we will tell you by email before the change takes effect. Carrying on using SunHarvest after that means you accept the new version; if you don't, you can delete your account at any time.
9. Ending the agreement
You can stop at any time by deleting your account. We may suspend or close an account that breaks these terms or puts the service or other users at risk. Where we can, we will tell you first and give you the chance to put things right.
10. Liability
Nothing in these terms limits liability that cannot be limited by law, including for death or personal injury caused by negligence, or for fraud. Nothing affects your statutory rights as a consumer.
Otherwise, SunHarvest is provided as it is. We are not liable for:
- indirect or unforeseeable losses
- energy costs, lost export income or lost savings resulting from settings, rules or plans
- loss of backup power during an outage
- failures of Tesla, your internet connection, or third-party providers
Our total liability to you in any twelve months is limited to the amount you paid us for SunHarvest in that period.
11. Law
These terms are governed by the law of England and Wales. If you live elsewhere in the UK or in the EU, you also keep the protection of the mandatory consumer law where you live, and can bring a claim in your local courts.
12. Contact
Email [email protected], or use Settings › Suggestions in the app. See Contact.