Opens in a new tab
Booth Walkthrough

OSW Debuts GreenSketch Software Alongside AlphaESS, Fox ESS, KSTAR at The smarter E 2026

Willem Schwaner, Head of Sales Benelux at OSW, walks through the wholesaler's booth at The smarter E Europe 2026 in Munich, covering the new GreenSketch design platform and hardware from partner brands AlphaESS, Fox ESS, and KSTAR. Schwaner speaks from direct commercial experience launching these products across Benelux, UK, German, and Australian markets.

Guest · OSW
Willem Schwaner
Head of Sales Benelux · OSW
Filmed ·Munich, Germany·Runtime 04:21Booth Walkthrough ·
Booth Walkthrough
The smarter E Europe 2026 · Munich
04:21
Filmed on site · No editorial direction beyond question set · Captions auto-generated, reviewed by EUPD Research

GreenSketch: OSW's Move Into Design Software

According to Willem Schwaner, Head of Sales Benelux at OSW, the wholesaler is adding a software layer to its existing distribution business in batteries, PV modules, EV chargers, and heat pumps. The platform, called GreenSketch, will carry more than 100,000 unique products and let installers generate a PV, battery, or heat pump proposal simply by scanning a customer's energy bill. Schwaner frames the goal as reducing installer overhead rather than adding a paid tool. The service will be free of charge, backed by customer success managers, with finance-plan features planned for the following year. The stated purpose, in his words, is to let installers "focus on the one and only thing that you want to do, and that's installing."

"The whole idea is that with scanning an energy bill, the offer will roll out automatically, and the system will guide you towards all the steps with AI tools." Schwaner · OSW · 00:58

AlphaESS and Fox ESS: VPP Integration and a New All-in-One Inverter

Schwaner credits AlphaESS with reshaping OSW's Benelux storage business after its launch roughly two and a half years earlier. He points to direct integration with energy providers as the main feature, allowing VPP trading without a separate EMS installation. He cites adoption in the UK, Netherlands, Belgium, and Sweden as evidence the model extends beyond Benelux. Fox ESS gets similar emphasis for market share, with Schwaner noting the brand reached the number-one position in Germany, the UK, and Australia over the past three years. He points to a newly launched all-in-one system built on the CQ7 high-voltage battery platform, which he says scales to 80 kilowatts per tower, which replaces an earlier stackable battery paired with a separate hybrid inverter.

"It's fast, profitable for end users, and these kind of markets will conquer Europe." Schwaner · OSW · 02:05

KSTAR: Data-Center Heritage Applied to Residential Backup

Schwaner positions KSTAR as the most technically advanced brand in OSW's lineup, tracing its engineering to ATS manufacturing for large data centers. He describes single-app control covering backup, peak shaving, load balancing, and demand control, alongside a battery pack under 50 kilograms that still requires two installers to handle. He calls KSTAR a rising star in the portfolio on value-for-money grounds, and also points to build finish as a differentiator. No specific market share figures were cited for KSTAR, unlike AlphaESS or Fox ESS.

"If you touch the product, if you feel the product, you feel all in all techniques." Schwaner · OSW · 03:23

Chapters

Chapters · click to jump
00:00
OSW Overview and GreenSketch Launch
Schwaner introduces OSW's wholesale business and previews the GreenSketch design software.
01:45
AlphaESS: VPP Trading and Direct Integration
Schwaner covers AlphaESS's software-driven storage model and its expansion across the UK, Benelux, and Sweden.
02:23
Fox ESS: Market Position and New All-in-One Inverter
Schwaner details Fox ESS's market leadership and the newly launched all-in-one system based on the CQ7 battery platform.
03:19
KSTAR: Technical Backup and Peak Shaving
Schwaner describes KSTAR's data-center-derived backup and load management features.
03:52
Closing: GreenSketch as Installer Support
Schwaner closes by tying OSW's product portfolio to the upcoming GreenSketch offer tool.

Interview transcript

Auto-generated · reviewed · ~3 min read
OSW is global leading wholesale in batteries, PV modules, EV chargers, and heat pumps, and we're happy to announce that we're also going to launch software. And this software is called Green Sketch. There will be more than over 100,000 unique products inside. This is Willem Schwaner. I'm Head of Sales for OSW for the western part of Europe. OSW is global leading wholesale in batteries, PV modules, EV chargers, and heat pumps, and we're happy to announce that we're also going to launch software. And this software is called Green Sketch. Our purpose, our target, is to make the life of the installer even more easy. Now we're doing it by supplying goods just in time, finance installers, and have the right product and proposition for you. Now we also want to make the offering really easy. And the whole idea is that with scanning an energy bill, the offer will roll out automatically, and the system will guide you towards all the steps with AI tools to make a PV design, to make a battery design, and to make a heat pump. It will be free of charge. There will be more than over 100,000 unique products inside, so you can offer whatever you want all across the globe. And of course, we want to assist you with that. We have customer success managers who can help you through it, but it will save you a lot of money also on software side. And in the end, we can deliver the product side. And we have more new features coming up in the next year that also will include finance plans to get your whole company make and helping you to focus on the one and only thing that you want to do, and that's installing. And that's where we're going to help out. Over here, we're standing by Alpha ESS, one of our most important partners. Basically, two and a half years ago, we launched this product into the Benelux market. We crushed the entire market with it. Basically, the main success of Alpha ESS, it's a software-based solution company. That means we made direct integration with energy providers. We can do direct VPP trading without complicated EMS installations. It's fast, profitable for end users, and these kind of markets will conquer Europe. We see it in UK, we see it in the Netherlands, we see it in Belgium and Sweden. Technical markets, VPP trading, direct integration, and nice-looking machines. That's what we're going for. Over here, we're standing at Fox. Fox is also a really important brand in our portfolio. Really impressive what they did. I think in the past three years, Fox conquered the German market, number one, UK market, number one, Australia market, number one. Of course, also now our part for western Europe, we need to make sure that in other countries, we also can become number one. The nice thing about Fox, also direct integrations, VPP-wise, with energy providers. They're on top of it. We're improving a lot. But also, as of today, we have a new all-in-one inverter. So before that, we had a stackable all-in-one battery with a separate hybrid inverter. Price competitive, one of the best in the market. 1C battery, nice hybrid inverter, really easy installation. Failure rate is almost zero. It's always first time right for my installers. That's what they like. But with the new integrated all-in-one inverter on top of the CQ7, it's one of the nicest and fastest product in the market. You can scale up to even 80 kilowatts in one tower. KSTAR is one of the most technical companies we have in our portfolio. You can see that the way they finish off a product, the finishing quality standard of KSTAR is really nice. If you touch the product, if you feel the product, you feel all in all techniques. This company comes from SDS manufacturing for big data centers. They have so much knowledge in backup, SDSs, ATSs, peak shaving, load balancing, demand control. Everything in one app. Technically, it's the most advanced product. And with that, we can do backup scenarios, power cuts, whatever. For us, this is a rising star in our portfolio. Money for value is really good. Also, the weight of the battery pack is below 50 kilograms, so it's a two-man job still. It looks really nice. Quality-wise, one of the best products we have in the portfolio. So here at OSW, we help you find the best product and proposition to sell to your customer. And as of tomorrow, with Green Sketch, we will also help you to make an offer in the most easy and cheap way you can ever imagine. Come and find us.
Show full transcript

Frequently asked questions

GreenSketch is a software platform from OSW that generates PV, battery, and heat pump proposals from a scanned energy bill, covering more than 100,000 products. Schwaner describes it as launching soon, with additional finance-plan features planned for the following year.

No. Schwaner states the platform will be free of charge, supported by OSW customer success managers.

According to Schwaner, AlphaESS integrates directly with energy providers, enabling VPP trading without installing a separate EMS. He says this drove strong adoption in the Netherlands, Belgium, UK, and Sweden.

Fox ESS has released an all-in-one system built on its CQ7 high-voltage battery platform, which Schwaner says scales up to 80 kilowatts per tower. This replaces the prior setup of a stackable battery paired with a separate hybrid inverter, per Schwaner.

Schwaner points to KSTAR’s background manufacturing ATS systems for data centers, applied here to backup power, peak shaving, and load balancing controlled through a single app. He calls it the most technically advanced product OSW carries, with a battery pack under 50 kilograms.

Schwaner says Fox ESS reached the number-one market position in Germany, the UK, and Australia over the past three years. He notes OSW is now working to replicate that in other western European markets.