Tilo brings colour into play. And chocolate to customers.
REFU on Tour: our Sales Manager Tilo Zwesper is touring all over Germany, visiting customers on site. Anyone who arranges a visit will receive a Lindt chocolate basket.

His paint tin says it in black and white: Tilo is “a reserved rock greige”. With customers, though, he brings colour into play. Our Sales Manager DACH Tilo Zwesper is touring all over Germany: from Berlin to Bavaria and down to us in the south. Because a conversation at the table is hard to beat, even in times of video calls.
And because a meeting simply tastes better with chocolate: anyone who arranges a visit will receive a Lindt chocolate basket.
What you can talk to Tilo about
- Your next project: which REFUsol inverters suit your plant, from commercial rooftops to solar parks, and how the REFUlink controls and monitors the plant.
- Repowering: how to replace old inverters. Until 18 December 2026 we deliver our C&I inverters free of charge in Germany and Austria. More about repowering
- Data security: who can access the control of your plant and where the data stays.
- Your existing REFUsol plants: questions about extension and operation. If there is a fault, our technical support will help you fastest.
How to get Tilo to visit you
Write to Tilo using the button below or call him directly. He will get back to you and arrange an appointment on site.
You can follow where Tilo is right now on his LinkedIn profile, where he shares the stops on his tour. You will find the link in the box below.
REFU on Tour. Personal. Direct. On equal terms.
If your compliance rules do not allow gifts, Tilo will of course come without the basket.

Tilo Zwesper
Sales Manager DACH
Read more
Company
Podcast “Watt ’ne Law”: who controls our solar plants?
Tilo Zwesper and Matthias Reisenauer were guests on the podcast “Watt ’ne Law”. The topic: who may control a PV plant remotely, and what does that mean for technology, procurement and responsibility?
Company
What we are taking away from Brussels: inverters are becoming a security issue
REFU took part in the industry exchange in Brussels on cybersecurity, high-risk inverters and EU funding. What this means for operators, EPCs and investors.
Trade fairs & events
Forum Solar PLUS: cybersecurity in networked energy systems
On 24 and 25 November we will be at Forum Solar PLUS at bcc Berlin. On Wednesday, Tilo Zwesper will talk about how networked PV plants and storage systems can be planned and operated securely.
Discuss your project
Planning a project? We advise you personally, directly with our engineers.
Or directly+49 7121 145 1888info@refu.com
Request a project