Where will your photovoltaic system’s inverter be installed? This is a question worth addressing during the site survey, before you finalize the quote. The spot that seems most discreet or aesthetically convenient is not necessarily suitable for the equipment.
This guide focuses mainly on wall-mounted inverters serving a panel array, whether conventional or hybrid. Microinverters have a different installation setup. If you’d first like to learn about the different types, read what an inverter is in a photovoltaic system.
Start with the exact model
Ask to discuss the location with the device’s full model code and corresponding installation manual in front of you. The brand or power rating alone does not describe all the requirements.
Mark two or three possible locations on a simple property plan. For each one, ask the installer to note why it is being recommended or ruled out. This lets you compare specific options instead of settling for a vague agreement that the device “will go somewhere near the electrical panel.”
Consider heat and sunlight
In the Sunny Tripower manual 8.0/10.0, SMA calls for a location out of direct sunlight and explains that overheating can lead to power derating. These are instructions for specific equipment, not a universal temperature limit for all inverters.
During the site survey, describe how you use the space in summer. A spot may be shaded at the time of the visit but get afternoon sun. Ask whether the exposure needs to be checked further and what solution is recommended.
Don’t assume that a small storage room that stays closed or an attic that you know gets hot is a suitable option. Ask for confirmation of suitability before committing the space.
Leave the required space around the device
The manufacturer’s clearance requirements are part of the installation. In the Symo GEN24 SC / Plus SC manual, Fronius specifies particular clearances and specific heat-dissipation requirements for enclosed environments. These figures do not automatically apply to a different model.
Ask for the plan to show the area that must remain clear as well. This will help if you later install shelves, cabinets, or other equipment. If you would like to conceal the device, show your proposal to the installer before anything is built.
A device fitting inside a cabinet does not mean it can operate inside one. Ask for a written assessment of any enclosure being proposed, including who is responsible for its design and construction.
Discuss noise in relation to how you use the space
For the model mentioned above, SMA notes that mounting on plasterboard or similar material may cause audible vibrations. So don’t assume that every inverter is completely silent in every location.
Mention if there is a bedroom, office, or space where you need quiet on the other side of the proposed wall. Ask for the available noise data for the specific model and an explanation of how the location is assessed. A general statement like “you won’t hear it” doesn’t help you compare options.
Check what outdoor installation means
In the manual in question, Fronius distinguishes the possibility of outdoor installation from choosing a sheltered location and avoiding direct sunlight. The enclosure’s protection rating is not enough to use as the sole criterion for choosing a location.
Show the installer where the downspouts drain, where you clean with water, and which areas have experienced water accumulation. Describe the actual conditions at the property so they can be assessed against the equipment instructions. If a battery is included, its location needs to be assessed separately.
Plan for access and future changes
Safe access for servicing and adequate mounting surface are among SMA’s requirements. Ask the responsible professional to confirm that the wall is suitable and that future work on the device will be possible.
As you plan your own space, also consider what you intend to change: will you enclose a terrace, add a storage cabinet, or renovate the area? Mention these plans before agreeing on the location. Ask for the necessary cable routes and any agreed additional work to be included in the quote.
At handover, ask them to show you which area must remain clear and how to contact support. The photovoltaic system handover guide will help you prepare for the appointment.
What to agree on before installation
- The exact model and its location on a plan or photograph.
- The assessment of sunlight, temperature, ventilation, and mounting surface.
- The clearances that must remain unobstructed.
- Compatibility with how the adjacent spaces are used.
- Access, cable routes, and any additional work.
Mounting, electrical connections, and any relocation must be carried out by a qualified professional. If you already have an installation, ask for an assessment before adding a cover or changing the layout around it.
At Solar Home, the assessment considers the space and requirements of your installation. Contact us to discuss your property and the available installation options.
Sources
- SMA — Sunny Tripower 8.0/10.0, manual, section 5.
- Fronius — Symo GEN24 SC / Plus SC manual, installation location selection. The references apply to the specific models; for your device, follow the corresponding instructions.
