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Find out how to install a solar energy system that exceeds the limit imposed by the concessionaire, optimizing energy generation for multiple consumer units

Written by Rafaela Fabris
Published 22/05/2024 às 15:31
Find out how to install a solar energy system that exceeds the limit imposed by the concessionaire, optimizing energy generation for multiple consumer units
Photo: Canva/Disclosure

Generating more solar energy than allowed by the utility is possible with the appropriate request for increased power available. This way, you can power multiple consumer units and make the most of the benefits of solar energy.

Did you know that installing a solar energy system has a size limited by dealerships? This limit is based on the power available to your consumer unit. But what do you do if you need to generate more solar energy than allowed to power other units?

When you decide to install a solar energy system in your home, it is common to think that you can install any size system and share the excess credits freely. But that's not quite how it works. According to ANEEL's normative resolution, the installed power of the photovoltaic system is limited by the power available to the consumer unit where the system will be connected.

To install a solar energy system higher than the limit, you must first find out what that limit is.

Therefore, to install a solar energy system above the limit, you must first find out what that limit is. The installed power of a photovoltaic system is the smallest value between the total power of the inverters (in kW) and the total power of the photovoltaic modules (in kWp).

For example, if a system has a 10 kW inverter and photovoltaic modules that total 15 kWp, the installed power will be 10 kW. If the inverter is 10 kW and the modules add up to 9 kWp, the installed power will be 9 kW.

Consult the electrical current of the circuit breaker in the input pattern of the consumer unit and the electrical voltage of the network

Now, to find out the power made available by the concessionaire, consult the electrical current from the circuit breaker in the input pattern of the consumer unit and the electrical voltage of the network. Multiply the network voltage by the circuit breaker current and the power factor, considering the number of phases (single-phase, two-phase or three-phase).

Let's look at a practical example: if the consumer unit has an 80A circuit breaker, a voltage of 220V, and the installation is three-phase with a power factor of 0,92, the power available will be: 3×220×80×0,92= 28.000W or 28kW3​×220×80×0,92=28.000W or 28kW. This means you can install a photovoltaic system of up to 28 kW.

But what do you do if you need to install more power?

But what do you do if you need to install more power? The solution is not to ask for an increase in the installed load, but to ask the concessionaire for an increase in the power made available together with the request for a connection quote for the photovoltaic system. This simplifies the process and speeds up installation.

Many professionals in the market still do not are aware of this possibility. Sharing experiences and tips in the comments can help everyone better understand how to optimize solar energy installation, ensuring efficient generation suited to their needs.

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Rafaela Fabris

Talks about innovation, renewable energy, oil and gas. Updates daily on opportunities in the Brazilian job market.

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