Poland Updates Grid Connection Rules For Residential Battery Storage Systems
New regulations allow households to pair solar installations with batteries up to 2.2 times their rated PV power without exceeding micro-installation capacity limits.
Poland has introduced significant changes to its grid-connection regulations for residential energy storage, following an amendment to the Renewable Energy Sources Act. Starting December 1, the rated power of a battery paired with a micro-installation will be excluded from the total installed power calculation, provided the battery's power does not exceed 2.2 times the capacity of the associated PV system.
Under the previous framework, battery power was only exempt from the micro-installation limit if it maintained a 1:1 ratio with the PV system. The new rule applies specifically to rated power in kilowatts rather than energy capacity in kilowatt-hours. To qualify, the combined grid feed-in from both the solar array and the battery must remain below the rated capacity of the micro-installation. Owners are required to implement export controls to ensure compliance with these feed-in limits.
The legislative change, which passed the Sejm on September 4 and received Senate approval on September 24, also mandates that electricity providers supply prosumers with more comprehensive monthly data regarding grid imports, exports, and financial values. Additionally, the act introduces an auction system for biomethane plants exceeding 1 MW and updates regulations for energy cooperatives. While the act does not include direct battery subsidies, the government estimates that if 20% of new net-billing prosumers adopt the maximum allowed storage ratio, connected battery power could reach 3.7 GW by the end of 2029.
These regulatory adjustments follow a June decision to relax building requirements that had previously faced criticism for potentially hindering storage deployment. Concurrently, the Ministry of Climate and Environment has initiated a PLN 1 billion ($256.9 million) subsidy program for home storage. This scheme covers up to 30% of eligible costs for batteries with a minimum capacity of 10 kWh, with a cap of PLN 800 per kWh. Storage systems already represented 60% of applications in the most recent round of the national Mój Prąd rebate program.
