Solar PV Systems
Roof surveys, yield calculations, panel and inverter installation, and grid registration — sized to your household's actual consumption.
Sundern · Sauerland · Germany
Energy independence for your home, built to last for decades.
ASU Haus und Energie GmbH plans and installs solar power, heat pumps and energy-efficient building technology for homeowners and businesses across the Sauerland region — from the first site survey to the final commissioning.
- Years in the region
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- Projects completed
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- In-house certified team
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Trusted by homeowners, landlords and small businesses throughout Sundern, Arnsberg and the wider Hochsauerlandkreis.
About ASU Haus und Energie
A local team, engineered around one goal: buildings that run on less energy.
Founded in Sundern, ASU Haus und Energie GmbH grew out of decades of combined experience in electrical installation, roofing and building services. We saw homeowners across the Sauerland struggling to navigate rising energy costs and fragmented advice — so we built a single company that plans, installs and maintains the full system, not just one piece of it.
Today our engineers and installers work on everything from single-family homes to small commercial buildings, always starting with an honest assessment of what a property actually needs before we recommend any hardware.
- 2013 Company founded in Sundern
- DIN & VDE Certified installation standards
- 25+ Skilled engineers & technicians
What we do
End-to-end energy and building services
Every project is handled by one team, from the initial site visit to long-term maintenance — no subcontractor hand-offs, no gaps in responsibility.
Heat Pumps
Air and ground-source heat pump design and installation, replacing oil and gas heating with efficient, low-emission systems.
Insulation & Roofing
Roof, facade and attic insulation that reduces heat loss and prepares the building envelope for solar and heat pump upgrades.
Battery Storage
Home battery systems that store surplus solar power for evening use, sized alongside your PV system for maximum self-consumption.
EV Charging Stations
Wallbox supply and installation for private homes and company car parks, with load management for multi-vehicle sites.
Maintenance & Support
Annual inspections, performance monitoring and repair callouts to keep every system running at its rated efficiency.
Why choose ASU
Straightforward advice, and a team that stays local.
We're not a national call centre dispatching whoever is available. We're a registered company based in Sundern, and the technicians who survey your property are the same ones who install and later service it.
Book a site visit-
Certified & insured installers
All electrical and heating work is carried out to DIN and VDE standards by qualified in-house staff.
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One point of contact
A single project manager oversees planning, permits, installation and commissioning.
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Transparent, fixed quotes
You receive a written quote before any work begins, with no hidden surcharges.
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Financing & subsidy guidance
We help you identify applicable KfW and regional subsidy programmes before you commit.
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Manufacturer-backed warranty
Every installation is registered with the manufacturer to keep full warranty coverage active.
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Fast local response
Based in Sundern, our service team can typically reach sites in the Hochsauerlandkreis within a day.
Get in touch
Tell us about your property, and we'll take it from there.
Send a short description of your project and we'll get back to you within one to two business days to arrange a free, no-obligation site visit.
- Company
- ASU Haus und Energie GmbH
- Address
- Röhre 22, 59846 Sundern (Sauerland), Germany
- Service area
- Sundern and the greater Hochsauerlandkreis