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In practice, market participants are not able to do this for every hour. Therefore, each one must have a contract with a supplier to ensure that shortfalls of electricity are covered and excess electricity is purchased. This system is called open supply. The open supplier, who has an open supply contract with the Transmission System Operator, is called a balance provider.

The following balance providers are operating in the Estonian electricity market:

The open supply contract between the balance provider and the TSO is called a balance agreement. The standard terms and conditions of this agreement are publicly disclosed and are the same for all balance providers. The balance agreement consists of the rules for balance service and the conditions for the purchase and sale of imbalance energy.

Attached down below you can find the complete list of all the open suppliers participating in the Estonian Electricity market.

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