Photovoltaic installation · Mamer, Luxembourg
Installation of 60 solar panels in Mamer, Luxembourg
Before the photovoltaic system could be installed, our technicians removed the home’s non-functional solar thermal collectors to recover usable roof space. The 60 Hyundai HJT panels were then distributed across three roof orientations and connected to a Sungrow SH25T hybrid inverter with three MPPT inputs, together with a 20 kWh Sungrow SBH battery.
60 panels
Hyundai HJT photovoltaic modules
3 orientations
Photovoltaic layout across the roof
3 MPPT
Sungrow SH25T hybrid inverter
20 kWh
Sungrow SBH battery storage
The starting point
The old solar thermal collectors had to be removed before the photovoltaic installation could begin.
The existing collectors were no longer functional and occupied roof space needed for the new photovoltaic array. For this project in Mamer, the first part of our work was therefore a carefully planned removal rather than an immediate panel installation.
Turning an existing roof into usable photovoltaic space
At Ecoclima, we first reviewed the existing rooftop equipment and the areas that could be recovered. Our technicians then removed the non-functional solar thermal collectors so that the 60-panel photovoltaic layout could be designed around the available roof surfaces.
For this home, the photovoltaic project started with the existing roof—not with a standard panel layout.
- Existing non-functional solar thermal collectors removed.
- Roof space recovered for photovoltaic generation.
- 60-panel layout designed across three different orientations.
The removal in pictures
Removing the obsolete system made room for the new photovoltaic array.
These photographs document the removal stage and show why this installation involved more than placing new panels on an empty roof.
Electrical design
Three roof orientations managed through the three MPPT inputs of the Sungrow SH25T.
Because the photovoltaic modules are distributed across three orientations, the electrical design had to reflect the different roof surfaces. The SH25T’s three MPPT inputs allow the three groups to be managed separately within the same hybrid inverter.
The inverter was selected around the roof, not the other way round
Each roof has its own geometry. Here, using an inverter with three MPPT inputs made it possible to address the three orientations without presenting them as one uniform surface.
The hybrid configuration also connects the photovoltaic production and the 20 kWh Sungrow SBH battery within one system.
The string configuration and equipment sizing shown here are specific to this property in Mamer and should not be treated as a standard design for every home.
Three orientations · Three MPPT inputs
Sungrow SH25T hybrid inverter
Roof orientation 01
MPPT 1
Roof orientation 02
MPPT 2
Roof orientation 03
MPPT 3
Installed configuration
60 Hyundai HJT panels with a Sungrow hybrid inverter and 20 kWh battery.
The equipment was selected as one coordinated photovoltaic and storage system for a home with a heat pump, swimming pool and a particularly high electricity consumption profile.
Solar generation
Hyundai HJT panels
60 panelsThe photovoltaic array uses 60 Hyundai HiT-H460LE-FB(ZB) HJT modules. Their layout was planned across the three available roof orientations after the old thermal collectors had been removed.
Conversion and management
Sungrow SH25T
3 MPPT inputsThe three MPPT inputs suit the project’s three roof orientations, while the hybrid design connects solar generation and battery storage within the same system.
Energy storage
Sungrow SBH battery
20 kWhBattery capacity was considered in relation to this household’s substantial electricity needs, including its heat pump and swimming pool.
Why a 20 kWh battery for this home?
This property has a heat pump, a swimming pool and an unusually high consumption profile. The 20 kWh capacity belongs to this specific project; battery sizing should always be based on measured or carefully assessed household demand rather than copied from another installation.
Local expertise
A photovoltaic renovation completed by Ecoclima in Mamer, Luxembourg.
A replacement project cannot be designed as though the roof were empty. In Mamer, our work began with the existing solar thermal installation, continued with a new layout across three orientations and finished with a photovoltaic and storage configuration suited to the home’s electricity use.
The existing installation was assessed first
The non-functional thermal collectors had to be removed before the new layout was defined.
The electrical design followed the roof geometry
Three roof orientations were addressed through the inverter’s three MPPT inputs.
Storage was considered around household demand
The heat pump, swimming pool and high consumption profile informed the 20 kWh battery choice.
The completed roof
A new use for the space recovered from the old thermal system.
The finished installation brings together 60 Hyundai HJT panels across three roof orientations, a Sungrow SH25T hybrid inverter and 20 kWh of battery storage.
Questions about this project
Replacing old solar thermal collectors with photovoltaics: FAQ
Why were the solar thermal collectors removed from this home in Mamer?
The existing solar thermal collectors were no longer functional and occupied usable roof space. Removing them allowed a new photovoltaic layout to be designed for the available roof surfaces.
Can old solar thermal panels be replaced with photovoltaic panels?
It can be possible, but the existing installation, roof condition, available area and new mounting and electrical design must first be assessed. The solution used in Mamer was developed for this specific property.
Why did this installation require three MPPT inputs?
The photovoltaic modules are distributed across three roof orientations. The Sungrow SH25T provides three MPPT inputs, allowing the three groups to be managed separately within the system.
Which photovoltaic equipment was installed in Mamer?
The installation combines 60 Hyundai HiT-H460LE-FB(ZB) HJT photovoltaic panels, a Sungrow SH25T hybrid inverter with three MPPT inputs and a Sungrow SBH battery with 20 kWh of storage capacity.
Why was a 20 kWh battery selected for this property?
This home has a heat pump, a swimming pool and a high electricity consumption profile. These uses were considered when selecting the storage capacity. A 20 kWh battery should not be treated as a standard recommendation for every household.
How should a photovoltaic system be sized for a home in Luxembourg?
The design should consider the roof surfaces and orientations, existing equipment, household consumption and planned electrical uses. A technical assessment is required before the panel layout, inverter and battery capacity are selected.
Planning a photovoltaic renovation in Luxembourg?
At Ecoclima, we assess the existing roof, household electricity needs and future uses before designing a photovoltaic and storage solution for the property.