Microgenerator connection

Starting from 1 April 2020 households no longer have to pay the variable part of MPC for the electricity transferred to and received back from the network. It has become even more beneficial to generate electricity and transfer it to the network – bills for consumed electricity get smaller, installed microgenerators pay off faster and generation of green energy will develop more rapidly.

 

In order to generate electricity for your own consumption, you have the opportunity to install a micro-generator in the existing connection and connect it for parallel operation with the electrical network. The micro-generator connection is a service used by both households and business customers (e.g. farms) that choose to generate electricity from renewable sources, thus reducing the amount of electricity received from the electrical network. To ensure that the operation of the micro-generator does not interfere with the electrical network, it is imperative to secure the approval for its installation from Sadales tīkls.

A micro-generator is a machine used for generating electricity and the related equipment (inverter), which is designed for AC electricity generation of 1-phase or 3-phase voltage with the operating current of up to 16A (amperes). It corresponds to a power of 3.7 kW in a 1-phase electrical network and 11.1 kW in a 3-phase network. Micro-generator parallel operation mode provides two-way exchange of electricity between the user’s electrical installation and the electrical network (electricity may flow both from the electrical network to the user’s electrical installation and in the opposite direction).

Micro-generators are intended for production of electricity for own needs rather than commercial purposes. When households start producing electricity, they can become members of the NET settlement system – transfer the electricity they have generated, but have not used immediately and use the electricity that was previously generated and transferred to the network, when own generated electricity is insufficient.

The NET payment system

The electricity NET payment system is applied to all households which install a microgenerator and generate electricity from renewable sources for their own needs, for example, by using solar cells or wind turbines, and are compliant with other criteria set forth in the Cabinet’s Regulations  and the Electricity Market Law (available in Latvian).

Monthly costs of electricity for any Latvian household, including those households, which are subject to the NET settlement system, include three items:

  • distribution system operator services,
  • mandatory procurement components (MPC): fixed part (in accordance with the connection capacity) and the variable part (renewables, cogeneration);
  • electricity fee.

The households producing electricity from renewable energy sources can save on two of these items – the payment for electricity and starting from 1 April 2020 also variable part of MPC.

It is calculated as follows: electricity received (kWh) – electricity supplied to the electrical network (kWh)

 

Important! If NET consumption is negative in the payment period of a month (more kWh are supplied to the network), the accumulated amount of NET consumption is credited to the payment period of the next month as the electricity supplied to the electrical network. Conversely, if NET consumption is positive, it is made of the kWh which are included in the bill of the payment period.

The settlement period within the NET settlement system is one calendar month. The transferred electricity should be used within the framework of one year, which lasts from 1 April to 31 March of the next year. All the savings are deleted, when a new settlement year starts. The NET settlement system is functioning only within the framework of one distribution system services agreement and savings are deleted, if the agreement changes.

For convenience of customers, a NET electricity report is available on the customer portal e-st.lv

 

Microgenerator connection implementation process

The microgenerator connection process is carried out in accordance with the procedure set forth in the Regulations Regarding the Terms of the System Connection for the Participants of the Power System (available in Latvian). In order to implement a microgenerator connection, the application for the Microgenerator connection must be submitted to Sadales tīkls. Before submitting the application, please do the following:

  • choose a certified microgenerator inverter, which is compliant with the requirements of the EU (European Union) standards and recognised by Sadales tīkls*, (the list is available here, available in Latvian);
  • assess the required production load;
  • consult with the local building board regarding its requirements for microgenerator installation.
Few steps left to start use of electricity produced:
1.
Submit the application

Please fill in and submit* the application form (information available in Latvian).

2.
Sign the agreement

No later than within 20 calendar days after receipt of the application, Sadales tīkls will prepare and send you a connection agreement and technical requirements. If the terms and conditions of the agreement are acceptable to you, please sign the agreement within 90 calendar days. If you have chosen to receive the contract electronically in your application, sign it with a secure electronic signature. If you receive the contract in paper form, sign and send it by post or submit it in person to Sadales tīkls, 1 Šmerļa Street, Riga, LV-1006.

3.
Install the microgenerator and prepare electrical installations

After signing the agreement, install the microgenerator according to the technical requirements as well as prepare the electrical installations up to the proprietary boundary of your electrical installations as specified in the agreement.

Please note that the above-mentioned works must be arranged and paid for by the customer and carried out by a certified specialist (a construction specialist who has obtained a certificate in the field of electrical installation construction).

4.
Fill in and send annexes to the agreement

When the works have been completed, please fill in and submit the annexes attached to the agreement*.

The following annexes to the agreement are required:

In addition, photos clearly showing the inverter, its data plate, protective device and solar panels are required. More information and sample of photos are available here.

5.
Sadales tīkls specialists will connect the microgenerator

No later than within 10 business days after receipt of the annexes and photos, Sadales tīkls specialists will check the installation of the microgenerator for compliance with the technical requirements, draw up an act of the accomplished work and send it to you by email. Please sign the act with a secure digital signature and send it to Sadales tīkls for signature. If you sign the document in paper format, please send it to the postal address indicated in the email.

Only after the owner or authorized person of the microgenerator has received the act signed by both parties the microgenerator may be connected for parallel operation with the low voltage electrical network of Sadales tīkls. Until then, the microgenerator may only be connected temporarily to carry out the microgenerator setup checks.

*Sign the documents with a secure electronic signature. If you do not use the electronic signature, print the documents, sign them and scan them. Then log in to Sadales tīkls customer portal e-st.lv open a new Free-form application (information available in Latvian) and type "Application for connecting a microgenerator / increasing the load" in the text field. Attach the completed documents and confirm the application. There is no need to submit the original documents. If you do not have the opportunity to submit the documents online, please send them by post to Sadales tīkls, 1 Šmerļa Street, Riga, LV-1160.