Telemarketing for the Sustainability Sector | MisterSales

Telemarketing that Generates Leads in the Sustainability Sector

Are you an installation company, or do you work in the renewable energy sector—a business that started with solar panels and now also sells home batteries, charging stations, and heat pumps? Then you don’t want to miss out on any opportunities. We provide high-quality leads and appointments that actually happen. No lead has to wait—we follow up immediately, even as late as midnight.

Lead follow-up: we call proactively until 9:00 p.m.
Customer service: with our mailing and live chat we are available until midnight
Close-up foto van handen met werkhandschoenen die zonnepanelen op een dak installeren

Why Telemarketing Is So Powerful

Your customers simply want a real conversation. We speak with them personally, explain your offering in plain language, and immediately take the next step toward scheduling an appointment, providing a quote, or placing an order. Because we’re experts in energy, solar, batteries, charging stations, and heat pumps, we make targeted calls and identify the most promising opportunities. You’ll get a scalable, GDPR-compliant approach with clear KPIs and successful results—all without the hassle.

An expert in your industry

It’s not just that one deal that counts, but the relationship you build for the future. During our conversations, we guide customers through their decisions, calmly explaining what investment is needed, what savings it will yield, and how the system will fit into their home. This ensures the customer understands exactly what they’re signing up for and feels taken seriously. We stay in touch, even after the installation, and call when there are questions or issues. If an evening or weekend is more convenient for your customer, we’ll call then. This way, you keep satisfied customers who come back for service, upgrades, or additional solutions—rather than one-time buyers who you lose afterward.

Why Choose MisterSales

Quick Lead Follow-Up

When someone shows interest, downloads a brochure, or fills out a form, we’ll call them back within 30 seconds—until 9:00 p.m.—to schedule an appointment.

Cross-Selling & Up-Selling

From solar panels to home batteries, from charging stations to EMS/monitoring, from central heating to (hybrid) heat pumps—we identify buying signals and address them with our customers.

Customer Retention

We proactively call customers when there are issues or questions about usage or rates. This results in fewer cancellations and more renewals.

Ongoing research

We’ll share examples from the conversations: objections, trends, and frequently asked questions. This will help you adjust your value proposition or proposal process more quickly.

Foto van dezelfde vrouw met headset en grijze blazer, rechtstreeks in de camera kijkend, HP-laptop op het bureau

Customer service until midnight

Your customers don’t work nine-to-five, so their inquiries often come in during the evening. That’s why we’re available until midnight, six days a week. Whether it’s a question, a complaint, or a technical issue, within 20 seconds your customer will be connected to a real person who listens, thinks along with them, and takes immediate action.

Whenever we can resolve an issue, we do so immediately. If follow-up is needed, we clearly document everything for your own team. This way, your customers always experience fast and professional service, while you don’t have to organize an expensive evening shift and still give the impression that you’re always there. Our customer service team is available six days a week from 6:00 a.m. to midnight.

Landschapsfoto van windturbines in een groen akkerveld onder een blauwe lucht
Jan Pieter Vreeken, Commercieel Directeur bij MisterSales Pleun van Herwijnen, Operationeel Directeur bij MisterSales

In short

No more endless stacks of resumes or cold applications—just direct, personal conversations with the right people. Telemarketing ensures speed, efficiency, and better matches. You build a strong talent pool; we make sure you talk to the right candidates. Contact us and find out how we can give your recruitment a boost.

MisterSales' Approach

Define objectives

Together we establish clear goals such as revenue, number of customers/leads and the period in which you want to achieve this. We map out the destination and waypoints together, so everyone knows where they’re working towards.

Sharpen your target audience

We map out your ideal customer: who they are, which market they operate in, and what relationship you want to build with them. It’s like zooming in with a lens, from a broad audience to exactly that customer who wants to say ‘yes’.

Develop contact strategy

We develop a thoughtful contact strategy and message to reach your target audience. Together we sketch the ideal customer journey, from first contact to a convinced decision, so nothing is left to chance.

Smart integrations

We connect with, for example, your CRM, calendar and mailbox for an efficient process. For you it feels like all the gears turn automatically, because appointments appear in your calendar and no lead falls through the cracks.

Content for every contact moment

We create smart content for multiple contact moments to nurture leads, feed them, confirm appointments or orders. Like a good series, each contact moment builds on the story, so the customer gradually gains more trust and decides faster.

Team training and kick-off

We train our team and your employees, so everyone uses the same approach. Then we launch the campaign together. The kick-off feels like a starting gun where everyone knows their role, is sharp and knows exactly when to accelerate.

Foto van een vrouw aan een bureau tijdens een sollicitatiegesprek, met laptop en klembord

Why Telemarketing Works at MisterSales

  • Specialized telemarketing agency
  • Scalable team with a quick start
  • Clear KPIs and transparent costs
  • Daily or Weekly Dashboards
  • Open 6 days a week from 6:00 a.m. to midnight

Yes. We work for both large and small organizations. Especially small entrepreneurs miss customers without telemarketing. Our approach integrates seamlessly with your organization. With quick follow-up, also in the evenings until 21:00, you seize those opportunities.

We proactively call leads (outbound) from 08:30 to 21:00, six days a week. Additionally, if you also let us handle your customer service and technical helpdesk, we can be active from 06:00 to 00:00. Especially in the evening hours we secure many appointments and orders, particularly in the consumer sector.

Definitely. We work with legitimate basis, do-not-call lists, clear opt-in and data minimization. Reports without unnecessary personal data.

After intake and materials, we can usually run a pilot within a few working days.

We deliver a daily/weekly dashboard with reach, appointments, cost per lead/appointment and insight into objections & buying signals.

Yes, we integrate or work directly in your CRM. We log calls, notes, status and next steps in a GDPR-compliant manner.

Yes, with pre-agreed pricing and scripts. We close deals by phone or prepare the order for your team to confirm.

Yes, we fill in your template, add context from the conversation and send the quote in your name. With e-signature if desired.

Yes, for sales reps and installation teams. We schedule in agreed time slots, account for travel time and send confirmation + reminder.

Yes, we resolve simple questions directly and schedule a service visit where necessary. Everything is properly recorded in the CRM.

What our customers say

We are rated 9.4 out of 10! And no less than 97% of our customers return for another application. Read the experiences here.

9.4 / 10

Allard van Berkel

Google review

For the financing of an investment property, we needed funding quickly. We had a phone call with Aike about our plans. Aike indicated he could definitely help us and within the deadline. We now have suitable financing for the current investment plan.

B. B.

Google review

I recently got in touch with Martijn and he helped me tremendously. It was a very pleasant collaboration.

Morris Xenakis

Google review

Great company to work with. I have been in contact with many financing parties, but this team truly stands out when you look at their performance. A big plus for me is that they are always very easy to reach, and we understand each other well, which makes the cooperation very pleasant. I would especially like to compliment Martijn and Julian for the enjoyable collaboration.

Demi

Google review

Had a pleasant collaboration; received good advice and was helped quickly.

Wouter Hoekman

Google review

I was in contact with Aike and Don, and they helped me excellently and there was good communication between us. I would recommend them to everyone.

Joost Feringa

Google review

Great company, good information, assisted by Mr. Van Veen. Highly recommended!

Portret van Jan Pieter Vreeken, Commercieel Directeur bij MisterSales

Jan Pieter Vreeken

Commercial Director

Portret van Pleun van Herwijnen, Operationeel Directeur bij MisterSales

Pleun van Herwijnen

Operations Director

Portret van Thijs, Support Manager bij MisterSales

Thijs

Support Manager

Portret van Ariejanne de Koning, HR Manager bij MisterSales

Ariejanne de Koning

HR Manager

Portret van Jorin Keekstra, Business Manager Spanje bij MisterSales

Jorin Keekstra

Business Manager Spain

Portret van Arina IJntema, Team Manager bij MisterSales

Arina IJntema

Team Manager

Portret van Sam van Middelkoop, Business Manager bij MisterSales

Sam

Team Leader Spain