Independent planning, tendering, construction supervision and maintenance of photovoltaic systems for commercial and private customers
Photovoltaik Service – Mössenlechner Consulting KG
Vienna (Vienna-Hietzing)New on Amplifa
About us
Photovoltaic Service (Mössenlechner Consulting KG) is an independent planning and expert consultancy office for photovoltaics based in Vienna-Hietzing. The company does not install systems itself, but instead handles the entire project management on behalf of its clients: planning with load profile analysis, roof and structural checks and yield forecasts, preparation of a uniform scope of services, tendering and award to at least three vetted specialist companies, construction supervision with acceptance inspection, as well as maintenance, servicing and remote monitoring. Planned systems include roof, façade and ground-mounted installations as well as PV carports for commerce and industry (focus from 30 kWp), single-family homes and agricultural businesses in Vienna, Lower Austria and Burgenland; offer and system checks are offered throughout the D-A-CH region. In addition, the service portfolio covers battery storage sizing (LiFePO4 and NMC, from 5 kWh for single-family homes up to commercial storage with peak shaving), self-consumption optimisation with heat pump, air conditioning and wallbox, bidirectional charging (V2H) including distribution of the MOON BiDi Charger DC 11, PV expert reports, measurements according to ÖVE/ÖNORM, as well as subsidy processing and electricity marketing.
- Site
- Vienna
- Processes
- PV planning / system design (roof analysis, structural check, yield forecast, load profile analysis), Tendering / award of PV systems, Construction supervision / site management and acceptance, Offer check / offer review PV, PV expert reports & quality assurance (condition assessment, fault analysis), Measurements according to ÖVE/ÖNORM (insulation and continuity tests, earthing, equipotential, Maintenance, remote monitoring and monitoring analysis of PV systems, Assembly / installation of PV systems (roof-mounted, flat roof, façade, ground-mounted, carport) by
- Materials
- PV modules, Lithium iron phosphate cells (LiFePO4), NMC cells, Lithium-ion battery storage, Lithium iron phosphate (LiFePO4), Bidirectional charging infrastructure
- Certificates
- TÜV-certified PV expert / expert appraiser, TÜV Rheinland certified PV expert (no. 3848397), Member of the Austrian Economic Chamber (WKO)
- Industries
- Photovoltaics / solar energy, Energy consulting and expert appraisal services, Commerce and industry, Agriculture, Private customers, Photovoltaics
- 01
Planning: site survey, roof and structural checks, grid connection, system
- 02
Award: tendering to at least three companies from a vetted pool,
- 03
Construction supervision: support of the execution, on-site inspection,
- 04
Maintenance: remote monitoring with alerting, recurring inspections,
- 05
Accompanying: subsidy processing (OeMAG, state subsidies), electricity
Components & Technology
PV modules
Core component for roof, façade, ground-mounted and carport systems, designed for actual consumption rather than maximum roof area.
Lithium iron phosphate (LiFePO4)
Cell technology for battery storage, considered more thermally robust than NMC with slightly lower energy density.
NMC cells
Cell technology for battery storage with higher energy density; selection is manufacturer-independent according to inverter, load profile and requirements.
Bidirectional charging infrastructure
MOON BiDi Charger DC 11 (11 kW DC, efficiency over 97 %, CCS2, IP55/IK10) for vehicle-to-home with MEB and MEB+ vehicles.
Locations
Vienna
ATCompany headquarters and planning office (Vienna-Hietzing); operating area Vienna, Lower Austria, Burgenland
- Materials
- PV modules, inverters, battery storage (LiFePO4/NMC), charging infrastructure
- Testing and measuring equipment for measurements according to ÖVE/ÖNORM (insulation and continuity tests, earthing, equipotential bonding)
- Remote monitoring and monitoring systems for yield and fault analysis
- MOON BiDi Charger DC 11 (distribution and installation planning)
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| PV planning / system design (roof analysis, structural check, yield forecast, load profile analysis)Engineering | – | – | – | – | PV modules, Inverters, Battery storage |
| Tendering / award of PV systemsEngineering | – | – | – | – | – |
| Construction supervision / site management and acceptanceEngineering | – | – | – | – | – |
| Offer check / offer review PVEngineering | – | – | – | – | – |
| PV expert reports & quality assurance (condition assessment, fault analysis)Testing | – | – | – | – | – |
| Measurements according to ÖVE/ÖNORM (insulation and continuity tests, earthing, equipotentialTesting | – | – | – | – | – |
| Maintenance, remote monitoring and monitoring analysis of PV systemsTesting | – | – | – | – | – |
| Assembly / installation of PV systems (roof-mounted, flat roof, façade, ground-mounted, carport) byAssembly | – | – | – | – | PV modules, Inverters, Mounting structure |
| Storage planning / battery storage sizing (single-family home 5–15 kWh, commercial, peak shaving)Engineering | – | – | – | – | Battery storage (LiFePO4, NMC) |
| Planning and installation of bidirectional charging (V2H) with MOON BiDi Charger DC 11Assembly | – | – | – | – | – |
| Wallbox planning and installation (also Fronius Wattpilot)Assembly | – | – | – | – | – |
| Energy management integration (Huawei EMMA, Fronius SG-Ready, sector coupling heat pump)Engineering | – | – | – | – | – |
| Air conditioning planning (split/multi-split) with PV connectionEngineering | – | – | – | – | – |
| Balcony power plant planning (up to 800 W)Engineering | – | – | – | – | – |
| Repowering / existing system inspection (e.g. module replacement from 20 to 60 kWp)Engineering | – | – | – | – | – |
| Subsidy processing (EAG/OeMAG, state subsidies)Engineering | – | – | – | – | – |
15 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Bidirectional DC wallbox | MOON (ambibox) / MOON Power (Porsche Holding Salzburg) BiDi Charger DC 11 | 1 | 11 kW DC charging/discharging power; efficiency over 97 %; CCS2 4.5 m; IP55/IK10 | – | Austria (Vienna, Lower Austria, Burgenland) |
| PV charging box (wallbox) | Fronius Wattpilot Flex Home 11 | – | – | – | – |
| PV charging box (wallbox) | Fronius Wattpilot Home 11 J | – | – | – | – |
| Hybrid inverter | Fronius GEN24 / GEN24 Plus | – | – | – | – |
| Energy management system | Huawei EMMA-A02 | – | – | – | – |
| Battery storage (commercial) | Huawei LUNA2000 | – | – | – | – |
| Battery storage (commercial) | SolarEdge CSS-OD | – | – | – | – |
| Battery storage (commercial) | neoom BLOKK | – | – | – | – |
| Battery storage (commercial) | neoom TERRA | – | – | – | – |
| Battery storage (commercial) | SIMPO HV Pro72 | – | – | – | – |
| Battery storage (commercial) | FOX ESS G-Max Plus | – | – | – | – |
| Battery storage (commercial) | SolaX ESS-TRENE | – | – | – | – |
| Heat pump | Stiebel Eltron | – | – | – | – |
| Consumption controller for hot water | Fronius Ohmpilot | – | – | – | – |
| Wallbox (bidirectional, not yet approved in Austria) | BMW Wallbox Professional | – | – | – | – |
Additional services
Reference customers
Quality & Certification
Technical inspections and measurements are carried out according to ÖVE/ÖNORM, including insulation and continuity tests as well as checks of earthing and equipotential bonding. Managing Director Mag. (FH) Andreas Mössenlechner is a TÜV Rheinland certified PV expert (certificate no. 3848397) and a member of the EXPERTA network of experts.
| Evidence | Vienna |
|---|---|
| TÜV Rheinland certified PV expert (no. 3848397) | |
| Member of the Austrian Economic Chamber (WKO) |
History
- 2010
Self-employment in planning, tendering and construction supervision of photovoltaic projects.
- 2024
VAT exemption for balcony power plants up to 800 W in Austria; corresponding consulting and planning included in the offering.
- 2025
Repowering project at Wika in 1230 Vienna: expansion from 20 to 60 kWp with a 50 kW commercial storage system (executed by AES Energietechnik).
- 2026
600 kWp PV carport for the Stadlauer Malzfabrik in 1220 Vienna, the largest PV carport in Vienna (executed by Austroport); market launch of the MOON BiDi Charger DC 11 in Austria from May 2026.