What we know about you, in plain English.

We’re building Watt Matters as an advisor — not a lead farm. The privacy policy reflects that. The short version: we collect what we need to give you honest solar advice, we don’t sell your contact to anyone, and you can delete everything any time.

What we collect

When you use the calculator: your monthly bill, roof area, hours of power cuts, pincode/state, system-type preference, and the result. No name or contact is required to run it.

When you sign up: email address and password (the password is hashed with bcrypt before it’s stored — we never see the plain version), and your role (homeowner or installer).

When you ask us to call you: your name, phone number, PIN code and, if you give it, your monthly bill — used only to call you about solar for your home. If you message us on WhatsApp instead, we see what you send (such as a photo of your bill).

When you submit a brief or interact with installers: name, phone, address, photos of your roof or electricity bill, preferred site-visit slots. This part is optional and only happens if and when you choose to engage installers through us.

During a paid assessment: your address, the roof measurements and outline our assessor records, photos of the roof, the assessor’s voice notes, and the figures on the electricity bill you show them.

If you go ahead with an installation: a project record — the quote you accepted, the stages of the work, and the documents you, your installer or we add to it, such as warranty certificates, commissioning papers and the handover pack. It exists so your paperwork is in one place for the life of the system.

Analytics: we use Google Analytics to understand how the site is used — which pages are visited, where visitors came from (for example a WhatsApp link or our leaflet), and whether the calculator gets finished. It sets cookies on this site and records things like your device, browser, approximate location and a random identifier for your browser. It never receives your name, phone number, email address or your bill, and we strip any email address or sign-in link from page addresses before they are sent. We don’t use it for advertising, and it is not connected to Google’s advertising products. You can opt out with Google’s opt-out add-on or by blocking cookies in your browser.

What we use it for

• Calculator results — compute your savings estimate, recommended system size, subsidy eligibility
• Account — save your estimate, sign you in, send transactional emails (welcome, password reset, payment receipts)
• Matching with installers — only after you explicitly submit a brief; only with the installers you choose to engage
• Service improvement — aggregated analytics to understand which articles get read, where the calculator funnel drops off, etc.

What we don’t do

• We don’t sell your contact information. Not to installers, not to advertisers, not to anyone. This is a core promise — the entire pitch of Watt Matters falls apart if we sold leads.
• We don’t share your details with installers until you ask us to. Even then, your phone and exact address stay masked until the moment you formally accept an installer’s quote.
• We don’t cold-call you. Communication from Watt Matters is only ever a direct response to something you started.
• We don’t track you across the web. No retargeting pixels, no advertising cookies, and nothing that follows you to other websites.

Who can see your data

The people who work on your home, the installers you choose to engage, and a small number of service providers we use to run the product. Nobody else.

People who work on your home

• Our assessor — receives your name, phone number and address so they can arrange and carry out the visit, and records what they find on your roof.
• Our advisors — see your report and your quotes, so they can go through them with you on a call.

Every assessor and advisor signs a written agreement with us before they see anything. It binds them to keep your details confidential, to use them only for your assessment, to keep them off their personal contacts and social media, to delete them from their own devices after the visit, and never to contact you for anything else or pass your details to an installer.

Installers

Installers we share your assessment with see only your area (for example, “Homeowner in Dwarka”), your report and your requirements — never your name, phone number or address. Only the installer whose quote you accept receives those, so they can do the work, and our agreement with them limits their use to your project.

Service providers

• MongoDB Atlas — where we store accounts, calculator results, assessments and installer profiles
• Cloudflare R2 — stores files, such as electricity bills, roof photos and project documents. Files are private and are only served to someone signed in who is allowed to see them
• Amazon SES — sends transactional emails (sign-in links, receipts, your report)
• Razorpay — processes payments (if you choose to pay for an assessment or a partner subscription)
• Google — in two places. If you choose to sign in with your Google account, Google confirms who you are. And during a paid assessment, our assessor uses Google Maps: your address is sent to Google to locate your home and load the satellite view of your roof that the assessor traces
• Vercel — hosts the website
• Google Analytics — counts visits and how the site is used, as described above; not used for advertising
• WhatsApp (Meta) — only if you choose to message us there; your messages are handled by WhatsApp under its own terms
• OpenAI and Anthropic — used during a paid roof assessment to save our assessor time: transcribing the voice notes they record on site, and reading the electricity bill you show them so the figures don’t have to be typed in by hand. Only that content is sent, only for that purpose, and neither provider is permitted to use it to train their models.

Each of these service providers is bound by its terms with us to keep your data confidential and use it only to provide the service.

Your rights

Under India’s Digital Personal Data Protection Act (DPDP Act, 2023) you can:

• Access the data we hold on you
• Correct anything that’s wrong
• Delete your account and all associated data
• Withdraw consent at any time (effectively the same as delete)
• Complain to the Data Protection Board of India if you think we’ve mishandled your data

Email [email protected] and we’ll action any of these within 30 days — usually within 48 hours.

How long we keep it

Calculator results and account data stay until you delete them. If you don’t come back for two years and have never submitted a brief or paid for anything, we’ll proactively delete your account and email you to confirm.

Project records and their documents are kept for as long as your system is in service, so the warranty papers are there when you need them — or until you ask us to delete them. If you ask us to delete your data while an installation is under way, we keep only what is needed to finish that project and to invoice it, and delete the rest; the installer you engaged keeps its own records under its contract with you.

Transactional records of payments (Razorpay invoices, etc.) are retained for seven years to satisfy Indian tax and accounting law.

Changes to this policy

If we make a material change, we’ll email everyone with an account at least 14 days before it takes effect. Trivial edits (typos, link fixes) we just update in place.

Contact & grievances

Watt Matters is operated by Deepam Enterprises, which is the data fiduciary for the personal data described above.

Anything we’ve missed, anything that worries you, or any data request — email [email protected]. Replies usually come within a day.

Grievance Officer (DPDP Act, 2023): Pranav Jain — [email protected]. If you have raised a concern about your personal data and aren’t satisfied with how it was handled, write to the Grievance Officer directly. We acknowledge within 48 hours and aim to resolve within 30 days. If you’re still not satisfied, you may complain to the Data Protection Board of India.