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Category: Installazione Impianti Fotovoltaici

Sale and Installation of Photovoltaic Systems | Dl Group > Blog Classic > Install Photovoltaic Systems
The work carried out

Retrofit Pv System

31 January 2025

If you are considering adding a storage battery to an existing photovoltaic system, this intervention can be an advantageous choice to optimise the self-consumption of the energy produced, improving the efficiency and energy self-sufficiency of your home or business.

Here are some aspects to consider when retrofitting a photovoltaic system with the addition of a storage battery:

1. Compatibility assessment

Make sure that the inverter of the existing PV system is compatible with the addition of a storage battery. In some cases, the inverter may need to be replaced or upgraded in order to handle both energy production and battery storage.

2. Battery selection

There are different types of batteries (e.g. lithium, lead-acid, etc.), each with different characteristics in terms of efficiency, durability and cost. Lithium batteries, for example, are more compact, durable and high-performance than lead-acid batteries, but also have a higher initial cost.

3. Battery sizing

It is important to correctly size the battery capacity according to the energy needs of your home or business. This depends on various factors, such as the amount of energy you consume during the day and night and the size of your photovoltaic system.

4. Integration with the system

The installation of a battery requires the configuration of an energy management system (EMS) that optimises when to charge the battery (during sunshine hours) and when to use it (during the night or at times of higher consumption).

5. Benefits

  • Increased self-consumption: You can use more self-generated solar energy instead of buying it from the grid, reducing your energy costs.
  • Independence from the electricity grid: In the event of a blackout, a battery can provide you with backup power, increasing the reliability of your system.
  • Sustainability: Reduce your carbon footprint further by using stored solar energy.

6. Costs and incentives

Installing a storage battery involves an initial investment, but there are also tax incentives (such as the Superbonus 110% in Italy, which may vary depending on regulations) that can help cover part of the cost. In addition, the depreciation of the battery can take place through savings on the electricity bill.

7. Maintenance and Monitoring

Storage batteries require minimal maintenance, but it is important to monitor their health periodically to ensure that they continue to function properly and store energy effectively.

If you already have a photovoltaic system and are thinking of implementing a storage battery, it may be useful to consult a specialised technician who can make an accurate assessment of your existing system and guide you in the choice and installation of the battery.

The work carried out

Storage System

9 December 2024

A storage system in the context pv is a device for storing the electrical energy produced by a photovoltaic system for use at a later time when solar production is not available (e.g. overnight or during cloudy periods).

What is a photovoltaic storage system

A storage system consists mainly of batteries (usually lithium-ion, lead-acid or other technologies) that store the electricity generated by photovoltaic panels. The storage system can be integrated into the photovoltaic system or added later as a separate component.

Main components of a photovoltaic storage system:

  1. BatteryIt stores the excess energy produced by photovoltaic panels.
  2. Inverter: converts the electrical energy produced by the panels (direct current) into alternating current that can be used in homes or industry.
  3. Battery Management System (BMS)monitors and manages battery charging and discharging to ensure safety and efficiency.

What a photovoltaic storage system is for:

  1. Self-consumptionIt allows the energy produced by solar panels to be consumed even when the sun is not present (e.g. in the evening or on cloudy days), increasing energy self-sufficiency.
  2. Independence from the electricity gridFor those wishing to reduce or eliminate energy consumption from the grid, the storage system allows excess energy to be stored for later use, without depending on external supply.
  3. Optimising the billIt allows stored energy to be used instead of being taken from the grid, reducing electricity bill costs, especially at times of day when energy from the grid is more expensive.
  4. Grid stabilityIn some situations, storage systems can also support the electricity grid, as they can return energy at times of peak demand, thus contributing to system stability.
  5. Energy backupIn the event of grid interruptions, the storage system provides a backup source of energy for the house or building.

In summary, a storage system in a photovoltaic system optimises the use of solar energy, improving self-consumption, reducing energy costs and increasing the reliability of the electricity supply.

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