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SEU Qualification – Financial benefits and Case Study


Solar Photovoltaic system with SEU(Sistemi Efficienti di Utenza, or efficiency systems) Qualification – Sartoria Eugubina (Gubbio, province of Perugia)

Is your company’s electricity bill too high?

Thanks to an SEU-qualified solar photovoltaic system, you can immediately

start saving thousands of euros a year off your energy bills. But how much does a system like this cost? The answer is absolutely

NOTHING. Inveco Group takes care of the siting and installation costs of new solar PV systems rooftop-mounted  on industrial premises. In this article we will look at these topics in depth, describing the case study of an SEU-qualified solar PV system installed for the company Sartoria Eugubina (Gubbio, Perugia).

What are the advantages of an SEU-qualified solar PV system versus a non-qualified system?

The benefits of an SEU-qualified solar PV system compared to one without the qualification are financial. This certification entails tariff concessions for self-consumed electricity (generated and not taken from the grid), especially for the variable items of the system’s general charges.

Example of quantified financial benefits thanks to SEU-qualified systems:

In the case of a Utilization Voltage  electricity supply (supposed photovoltaic self-consumption energy: 100,000kWh), if the solar PV system had no SEU certification, the system would be subject to general charges of about €8,000 a year. These savings would obviously be more than proportionate for energy-intensive users.

What is Inveco’s SEU proposal?

Inveco installs SEU-technology solar PV systems on the end-user’s industrial premises rooftop at its own expense. Thanks to an operative lease agreement, the company hosting the system can purchase the electricity generated with this solar PV system at a preferential price.

The end-user can enjoy financial benefits straight away, without having to sustain initial upfront investment costs for the solar PV system.

Case study: SEU Photovoltaic System (Sartoria Eugubina, Gubbio, Perugia)

This solar PV system, situated in Gubbio (Perugia) was completely reconfigured by Inveco, and we modified the electrical system connecting it to the national grid owned by Enel Distribuzione SpA.

This PV system, which has been operational since 26th June 2012,  was subjected to “a significant maintenance and technological modernisation procedure” consistent in the variation of the generated energy’s feed into the grid. From 18th July 2017, it shifted from a total feed to a partial feed contract.

On 18th July 2017, e-distribution, following instructions from the person directly responsible, installed a second meter (“Utilization Voltage meter to measure the incentivised and generated energy”), type GET4S, cod. 15E3M5721.

This intervention did not require complex work, therefore it was not necessary to apply to relevant authorities to initiate any kind of procedure for authorization and/or approval.

The new partial feed and self-use contract required an electric workshop license, issued by the local customs and excise authority, Agenzia delle Dogane. The POD code has remained the same.

Then we applied for the SEU qualification, as the system was previously running with an incentive IV-CE-Feed-in-Premium contract (tariff + RiD, or net metering). This will yield savings of approximately €8,000 per year in terms of general charges, for each 100 thousand kWh generated and self-consumed.

seu-qualificationThe SEU qualification has yielded savings of €6,500 per year for Sartoria Eugubina

Click here to download this solar PV system’s past production data.

Sartoria Eugubina’s PV array is made up of 380 Canadian Solar CS6P polycrystalline modules with rapid Multi Contact connectors to facilitate installation, with an overall nominal power of 94.8KWp.

The modules are grouped together in 10 sub-fields (5 SMA S:T:P: 17000TL-10 Invertors) consisting of strings of varying lengths (19/20 panels). In each string, the panels are series wired; each sub-field is connected to MPPT charge controllers separated from the inverter.

This array includes the relative manoeuvre devices and isolator switches. The inverters include integrated and certified interface devices, which ensure the system’s safety, and respect the requirements set out by the electricity utility companies for the quality of energy fed into the grid.

The inverters are parallel wired and energy is transported by means of an underground cable to Enel Distribuzione’s Utilization Voltage connection point.

The mounting rack structure of each string is made of an aluminium frame bolted to galvanized steel supporting brackets which are tightly fixed to the roof surface; the modules are attached to the rails with bolts and clamps; this structure ensures easy installation and maintenance; the whole structure, including the photovoltaic modules, are designed to withstand static loads caused by weather exposure, in accordance with current legislation.