The Green Term Ahead Market (G-TAM) comprises of contracts for trade in electricity generation from renewable energy sources which approved by commission. GTAM operate in accordance with the procedure issued by POSOCO for ‘Scheduling of Bilateral Transactions’ under CERC (Open Access in Inter-State Transmission) Regulations, 2008, CERC Power Market Regulations, 2010; CERC Open Access in inter-State Transmission Regulations, 2008; CERC Indian Electricity Grid Code Regulations, 2010 as amended from time to time and the Bye-Laws, Rules and Business Rules of the Exchange.

There are three sub-segments within G-TAM market namely GTAM Solar, GTAM Non-Solar and GTAM Hydro. In Solar sub- segment, only electricity generated from solar energy sources shall be traded and in Non-Solar sub-segment, electricity generated from renewable energy sources other than Solar energy sources shall be traded as allowed by commission from time to time.

Market Features:

• Trading of power available for each 15-minute time block in 4 types of contracts i.e., GTAM Contingency (Intra-Day & Day-Ahead), Daily, Weekly and Monthly.
• All types of contracts are national level.
• Exchange to manage risk management by applying initial margin and additional margin as specified in Byelaws, Rules and Business Rules of the Exchange for the respective trading segment or the type of contracts.
• All the entities which are eligible to procure power through Open Access can participate in G-TAM as buyer.
• Solar RE generating stations are eligible to sell in GTAM-SOLAR segment and all other RE resources other than solar are eligible (to sell) in GTAM-NONSOLAR segment.
• The buyers may claim compliance of Solar and Non-Solar RPO against electricity procured from the ‘Solar’ and ‘Non-Solar’ sub-segments.