WhatsApp Broadcast for Solar Business

Most Indian solar EPCs are already on WhatsApp. Most customers use WhatsApp every day. The problem is that most businesses are using it the wrong way, one-by-one manual messages, copy-paste chaos, and zero record of who responded. For a small team with modest lead volume, WhatsApp Broadcast is a free way to fix that. It will not do the selling for you, but it saves repeated typing and keeps follow-ups on a routine.

This guide covers everything: how broadcast actually works, the list-size limit and where to check it, five message templates you can adapt, the best times to send in India, opt-out etiquette to keep your number safe (the Hindi guide to a weekly WhatsApp routine with an opted-in list shows one way to run it), and a practical signal that tells you it is time to graduate to the WhatsApp Business API.

Illustrative example (not a customer story): picture a 6-person EPC in Pune whose reps send individual messages to every prospect at the proposal stage, copy-pasting the same text all day. If the team sets up one broadcast list for "Proposal Sent" contacts and sends a short nudge each week, it replaces much of that typing and keeps follow-up on a routine. The time saved and the reply rate depend on your list and your message, so track both from the first week.

What is WhatsApp Broadcast, and what it is not

WhatsApp Broadcast sends one message to many contacts simultaneously. Each recipient receives it as a private message from you, not a group message. Recipients cannot see each other. Replies come back as individual conversations. It looks and feels like a personal message.

WhatsApp Broadcast is not WhatsApp Groups. In a group, every member can see every message and reply. Broadcast is one-to-many private delivery. This distinction matters for solar sales: you never want a prospect seeing what you said to another prospect.

The three WhatsApp options for Indian solar businesses

The critical rule for the classic broadcast list in the personal and Business app: the recipient must have your number saved in their phone, or they will not receive the message. WhatsApp's own business pages now also describe business broadcasts that reach customers who have not saved your number, in select countries (WhatsApp Business, business broadcasts, checked 31 Oct 2026). Which one you get depends on your app version and country, so check in your app. Either way, message only people who have agreed to hear from you. It is worth reading the WhatsApp Business vs. personal-app breakdown before you pick which one your team should standardise on.

The "saved number" problem, and the fix

When a customer enquires via IndiaMart, JustDial, or a Facebook lead form, they have never spoken to you before. They almost certainly have not saved your number.

The fix is a two-step warm-up:

1. Send an individual message first: "Hi [Name], this is [your name] from [company]. You enquired about rooftop solar, I'll send you the details in a moment."
2. Respond immediately to any reply. Even "Ok" counts.

Once they reply, they are more likely to have saved your number, and they have at least engaged. Ask whether they are happy to get updates on WhatsApp, then add them to a broadcast list.

Setting up WhatsApp Business app for broadcast, step by step

Five broadcast message templates that convert for Indian solar

Every template below uses personalisation fields in brackets. Fill these in before sending, or use the quick-reply shortcut. If you'd rather not write these from scratch, our full library of WhatsApp follow-up templates covers a wider set of scenarios than the five here.

Template 1, Subsidy update (PM Surya Ghar news)

Hi [Name], quick update for you, the PM Surya Ghar subsidy for a [3 kW / 5 kW] system is ₹[amount] right now, and applications are being processed in [your district]; check the current timeline before you quote one. We have helped families in [area] with this. Want me to check eligibility for your home? Takes 5 minutes on a call.

Why it works: Positions you as an information source, not just a seller. The local detail ("in [area]") is the most important personalisation element, cut it if you don't have it.

Template 2, Site visit reminder

Hi [Name], just confirming our site visit tomorrow at [time] at your place in [area]. I'll bring the shadow analysis report and a rough system sizing, usually takes 30–40 minutes. Any change, just let me know. Looking forward to it, [your name], [company] 🌞

Why it works: A reminder the day before gives the customer a chance to reschedule instead of simply not being home. Stating how long the visit takes ("30–40 minutes") sets expectations. Adjust the duration to your own surveys.

Template 3, Proposal follow-up (Day 3 after sending)

Hi [Name], hope you had a chance to look at the proposal I sent on [date]. Happy to walk through it on a quick call if anything needs clarification, especially the payback period calculation. For a system like yours, the payback in the proposal is [X] years. Let me know a good time?

Why it works: References the proposal date (shows you're organised), offers value (payback walkthrough), and keeps the next step small. For more on timing, see our follow-up cadence guide.

Template 4, Festive offer (Diwali, Holi, financial year end)

Hi [Name], Happy [Diwali] from the SolarEdge team! 🪔 This month we're offering [your own offer, with its value and conditions]. If you've been thinking about solar, this is a good time to move. Offer valid till [date]. Want me to reserve a slot?

Why it works: Festive timing creates urgency without being pushy. State the offer, its value and the end date plainly, and only use an offer your company has actually approved.

Template 5, Reactivation (Cold leads, 45+ days of silence)

Hi [Name], it's been a while! I noticed you hadn't moved forward with the solar proposal from [month]. No pressure, just wanted to share that [if true: module prices have come down since then], which could reduce your system cost. If you want, I can send a revised quote in 10 minutes. Happy to share it on WhatsApp.

Why it works: A real change since the last conversation gives the customer a new reason to re-engage. Use the price-drop line only if your own quote has actually come down, and quote the revised figure, not a market-wide percentage.

Best times to send broadcast messages in Indian solar sales

Timing matters, but we do not have measured open-rate data for Indian solar buyers. The windows below are a starting point based on common daily routines, not benchmarks. Test them on your own list and keep what works.

What to track instead of borrowed benchmarks

We have deliberately left out open-rate and reply-rate benchmarks, because we could not source verified figures for Indian solar buyers. Count your own sends, replies and site visits booked for a month, then compare against our WhatsApp conversion rate benchmarks post. For more on follow-up strategy, see our guide on solar sales follow-up rules.

A Safe-Volume Plan for Your First Broadcasts

On the WhatsApp Business Platform, Meta rates each business number on quality, and WhatsApp may limit sending if people block or report you. A new number that fires a thousand messages on day one is likely to collect blocks. The plan below is a cautious rule of thumb of ours, not a WhatsApp limit.

• Start small. For the first 30 days, send only a small number of business-initiated messages per number per day (for example, 100 as an assumption you can adjust), and only to your best segments: recent enquiries, past customers and people who asked for a callback.
• Scale in steps. Add roughly 100 a day each week, and never jump several steps at once.
• Watch the block rate. Check it every morning in your provider's dashboard, or watch for people blocking you in the app. If blocks start to climb, pause and fix your targeting before sending again.
• Invite a reply. Every broadcast should ask something simple, because replies open the free 24-hour conversation window and help your quality rating.

Before the first send, split your contacts into hot (enquired in the last 90 days), warm (90 to 365 days) and cold (older). Send only to the hot group the first week, and log sends, blocks and replies in a sheet that you review every Friday. If you work with partner installers, share one broadcast calendar and one suppression list so nobody freelances with their own tools.

Two layers of consent, and a log to prove it

You need WhatsApp's own opt-in and India's DPDP Act 2023 to be satisfied at the same time. Meta expects people to have agreed to hear from your business, which a website tick-box, a customer who messaged you first, a signed line on a paper enquiry form or a keyword reply such as "YES" can show. A purchased phone list fails every one of those tests. Under the DPDP Act, a phone number is personal data, so tell people what you will use it for, collect consent for that purpose, honour withdrawal, and delete data you no longer need. Our DPDP Act glossary entry explains the duties in plain language.

Keep a consent log with the phone number, source, date and the exact wording the person agreed to. Keep it in a sheet or in the notes on each lead, so you can show it if anyone asks. Put an opt-out line such as "Reply STOP to unsubscribe" on every marketing message. It satisfies both rules and also lowers block rates, because annoyed contacts reply instead of blocking you.

Broadcast to surface, one-to-one to close

A broadcast reaches many people cheaply, but it rarely closes a sale by itself. Use it for one-to-many moments such as a subsidy update or a festival offer. Use one-to-one messages for the proposal nudge, objections and survey rescheduling. A festival broadcast to a couple of thousand contacts might bring a few dozen replies. Those replies deserve a named rep, a survey slot and a branded proposal within a day, because that second step is where the deal is won.

Opt-out etiquette, protecting your number and your reputation

Minimum opt-out standard for Indian solar broadcast:

• Include an opt-out line in every broadcast: "Reply STOP to unsubscribe from updates."
• Remove anyone who replies STOP from all broadcast lists within 24 hours.
• If a customer says "please don't message me" or "nahi chahiye" in any language, treat it as an opt-out immediately.
• Never add someone back to a broadcast list after they opt out, even if they enquire again later. Start a fresh individual conversation instead.

Frequency guidelines: For leads at "Proposal Sent" stage, maximum one broadcast per week. For "New Lead" stage, maximum two messages in the first week, then weekly. For "Cold" leads (45+ days), one reactivation attempt per month.

Broadcast (app) vs WhatsApp Business API, detailed comparison

Understanding when to move from the free app to the paid API is one of the most important decisions a scaling solar EPC makes. The wrong timing in either direction costs money or sales.

A practical signal to migrate: around 50 leads per month

The 50-lead figure is our rule of thumb, not a WhatsApp rule. It is roughly where these problems start to show up:

• Your broadcast lists start filling up with contacts who have not been individually contacted recently (stale lists = higher spam report rates)
• Managing labels and replies manually takes more than 2 hours per day across your team
• The inability to assign conversations to specific reps creates errors, two reps replying to the same lead
• You start losing track of which leads have been followed up and which haven't

Around that volume, ask providers for their current fees and WhatsApp's per-message charges (see WhatsApp pricing in India), then compare the total with what one lost deal costs you.

For a deeper understanding of the API setup, costs, and BSP selection, see the complete WhatsApp Business API for solar guide.

The companion question, how to convert those WhatsApp leads once they're in conversation, is covered in the solar lead via WhatsApp conversion guide.

Broadcast in context: where it fits in your solar sales funnel

WhatsApp Broadcast is most effective in the middle of the funnel, after first contact but before close. Here is where each template type fits:

For a complete view of where broadcast sits across the entire conversion journey, see the solar sales funnel India guide. For lead-level filtering so you only broadcast to high-intent contacts, see qualifying solar leads.

Pros and cons of WhatsApp Broadcast for solar EPCs

How Quickest Solar CRM supports WhatsApp follow-ups

Once manual broadcast management becomes a drag on the pipeline, the next step is a CRM that keeps leads, follow-up reminders and labels in one place, and a checklist of must-have WhatsApp CRM features is a useful reference before you commit to one.

• Lets you log an activity (such as a WhatsApp chat or call) against a lead, or against several leads at once
• Lets you share the proposal PDF on WhatsApp from the lead
• Lets you set follow-up reminders on a lead, so you remember to nudge after a proposal
• Supports saved message templates you can reuse for follow-ups
• Supports team members with permissions as your team grows
• Lets you filter leads by pipeline stage and label, so you can pick who to message
• Applies the PM Surya Ghar subsidy inside the proposal

For installers who generate leads from Facebook Ads, whichever tool you use, contact each new lead quickly and log it against the lead. See how solar leads from Facebook Ads work for context.

IndiaMart leads have a similar problem: high speed-to-contact requirement. See solar leads from IndiaMart to understand the follow-up window.

For a full comparison of whether a CRM investment makes sense at your current stage, see when to buy a solar CRM.

When you are ready to send proposals on WhatsApp itself, not just follow-ups, see how to send a solar proposal on WhatsApp. Quickest's follow-up reminders and saved message templates cover the follow-up side from the same lead screen.

External references

• WhatsApp Business Platform, Meta official (broadcast rules, API tiers, BSP directory, and template policy documentation)
• MNRE, PM Surya Ghar Muft Bijli Yojana (official scheme page; subsidy amounts by system size referenced in Template 1)
• TRAI, Telecom Commercial Communications Customer Preference Regulations (its September 2026 amendment covers calls and SMS; it does not name WhatsApp)
• DPDP Act 2023, MeitY (Digital Personal Data Protection Act; governs customer contact data stored for WhatsApp follow-up)
• Solar Energy Industries Association, Industry Research (global solar market benchmarks for customer communication channel preference)

Frequently Asked Questions