Expert Guide: Installing a Solar Battery Storage System in Le Locle

8 °C and nearly 107 frost days per year. With significant heating needs, illustrated by 4,007 heating degree days, effective energy management is a priority for homeowners.

The local solar irradiation, estimated at 1,302 kWh/m²/year, offers real potential for photovoltaic production, but production is lower in winter, the period when needs are highest.

A battery is useful if your solar production significantly exceeds your daytime consumption, which is often the case in Le Locle during the summer months. By installing a storage system, you compensate for the gap between daytime production and nighttime needs, especially during months with more generous sunshine.

This project is particularly opportune if you are planning a global renovation of your heating system or during the initial installation of solar panels, in order to maximize self-consumption and reduce your dependence on the grid during periods of high demand.

The selection of your battery system must be based on your actual consumption profile rather than just the peak power of your panels. Size the capacity according to evening consumption to ensure optimal coverage between sunset and the following morning.

It is crucial to verify compatibility with your existing inverter before purchasing, as there are AC-coupled or DC-coupled solutions, each with its own technical specifications and installation requirements.

Options also include smart energy management systems (EMS) that allow you to prioritize battery charging or powering other household appliances. Durability and the number of charge cycles are key quality criteria to ensure the longevity of the investment.

Finally, consider modularity : some systems allow for adding extra storage units if your needs evolve in the future, thus offering valuable flexibility for a durable installation adapted to the local climatic context.

The real estate stock in Le Locle is marked by great diversity, ranging from old constructions to more recent buildings. For any battery installation, it is crucial to assess the state of your home's internal electrical network.

In buildings constructed before 1990, specific checks on insulation and the compliance of electrical wiring must be carried out by a professional to ensure a safe integration of the new components.

The cellar or garage where the battery will be installed must also feature stable conditions, despite the region's harsh winters. Temperatures that are too low can affect the performance and lifespan of lithium-ion cells.

Ensure that the chosen space is dry, well-ventilated, and that the walls do not show traces of dampness. A prior technical diagnosis is highly recommended to ensure that the structures supporting the battery weight are adequate, particularly in older buildings whose floors may have specific constraints.

For solar installations in Le Locle, a simplified notification procedure is in force. It replaces the classic building permit for installations mounted on a roof, located in the building zone, and that are not in zones or on objects protected by cantonal or municipal law.

This notification must be submitted to the competent municipal or cantonal authority, about twenty days before the start of works.

Regarding heritage, it is imperative to consult the municipal urban planning department of Le Locle before taking any action. Each building may be subject to specific requirements depending on its geographical location or historical importance.

Do not assume a single rule for the whole city : the urban planning department will provide you with documents and procedures specific to your address, ensuring that your project complies with current local regulations without the risk of future challenges.

Tax-wise, investments aimed at saving energy and protecting the environment are deductible from your taxable income. If these expenses cannot be fully deducted in the year of invoicing, they can be carried forward to the two following tax years, provided they were fully declared in year N.

This carry-forward rule is crucial for optimizing the tax management of your work.

Note that the choice between deducting actual expenses and the flat-rate deduction (10% or 20% of gross yield depending on the age of the building) must be made carefully for each tax period. If you opt for actual expenses, you must necessarily justify the expenses related to energy improvement.

The tax authorities will automatically determine the carry-forward expenses. We advise you to prepare your file in advance by organizing all invoices related to the work, and to consult a tax advisor if necessary before declaring your income, in order to maximize the benefits linked to your solar investment.

The realization of a solar storage project follows logical steps that guarantee the compliance and efficiency of the installation. First, request quotes from qualified professionals after having performed your own energy audit.

Once the professional is chosen, validate the quote and submit the notification to the competent authority about twenty days before the start of works. This administrative phase is short but essential for complying with local legislation.

Scheduling the installation should ideally avoid periods of intense cold, even though the installation is mostly indoors. Access to your home and the extreme climatic conditions of Le Locle can influence the fluidity of the work.

Once the components are delivered and inspected, the actual installation typically lasts a few days, followed by a testing and commissioning phase.

Ensure you are present for the handover of the site and the training on how to use your management system, to fully understand how to monitor your energy performance from the first day of operation.

Never neglect to check the compatibility between your solar inverter and the chosen battery system, or you risk significant additional costs during commissioning.

A common mistake is overestimating the necessary storage capacity: size according to your actual night-time needs and not according to the total power of your photovoltaic panels. Also ensure that the installer includes an emergency shut-off solution that is easily accessible in case of a technical problem.

Before requesting quotes, verify that your file is ready : determine precisely the current power of your panels and your actual annual electricity consumption. Check that the space provided for the battery is dry, temperate, and accessible. Check with your municipality for any specificities related to your building.

Finally, require a detailed quote including labor costs, equipment, and commissioning. Ensure that the selected company has the necessary certifications to work on grid-connected electrical installations.