Storage battery or domestic battery
In this article, we'd like to clarify a few points about storage batteries, also known as domestic batteries. Please do not hesitate to contact our specialists for further information.
A storage battery to increase self-consumption
Battery storage is an interesting option for deferring consumption of the photovoltaic electricity you produce. Solar electricity is produced during the day, whereas households mainly consume it in the evening, when the installation is shut down. Storing excess production rather than feeding it back into your distributor's grid allows you to increase your own consumption.
The advantages of self-consumption
Using the electricity generated by your own solar panels can significantly reduce your electricity bills. Consuming your own energy avoids purchase and transport costs. This reduces your dependence on your distributor and your vulnerability to price fluctuations.
Photovoltaic electricity storage
Batteries (lithium-ion in most cases) are used to store excess production and use it when needed. In this way, a household can use up to 70% of the electricity produced on the roof of its home, whereas without batteries, the self-consumption rate is usually 30%.
The inverter, the system's orchestra conductor
The battery can be installed at the same time as the photovoltaic panels, or added at a later date to complete the installation. In the latter case, you need to make sure that the inverter is capable of managing the battery, since it controls its charge-discharge and transforms the direct current from the solar panels into alternating current, compatible with your household appliances. This is known as a hybrid inverter. What's more, to guarantee continuity of power to your home in the event of a power cut, your hybrid inverter must be equipped with a backup power supply.
Battery specifications
The choice of a domestic battery is determined by the size of the photovoltaic system and the amount of electricity fed into the grid. The greater the discharge, the greater the battery's storage capacity. The lifetime of a battery is a manufacturer's estimate based on the number of complete charge-discharge cycles the battery will be able to withstand.
Storing energy in a car or water heater
Your electric vehicle's battery can also store your excess photovoltaic production. However, you'll need to install a bi-directional charging station, and make sure your car model is compatible with this system. Coupling your photovoltaic system to your water heater, for example, is another way of storing energy for later use as heat.
Choosing the right service provider
A company certified "Les Pros du Solaire" by Swissolar is a guarantee of quality and reliability in a rapidly expanding market. You can be sure that the battery installed is approved for Switzerland and complies with current standards. Don't hesitate to compare several offers, then ask your chosen supplier for a complete file including a diagram of the installation, as well as the equipment's performance and guarantees. Some communes offer subsidies, and the installation is tax-deductible. Find out more from the relevant authorities.
SEIC is of course at your disposal to answer your questions and discuss your project in detail. Our team will advise you on the best self-consumption solutions and manage your project. Don't hesitate to contact us, we'll be delighted to help.