{
  "name": "Adding a battery to a solar PV plant in Greece: the rules of article 11Γ of Law 4685/2020",
  "description": "Which PV plants can add a battery, minimum capacity, payment, injection limits, permit amendments, the order of examination at ΑΔΜΗΕ and ΔΕΔΔΗΕ, the letter of guarantee and fire safety, with the provision for each.",
  "inLanguage": "en",
  "source": "https://ariadnelabs.eu/guides/adding-battery-storage-to-solar-pv-greece.html",
  "dateModified": "2026-10-20",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "Ariadne Labs",
  "rows": [
    {
      "What": "Which PV plants",
      "Rule": "plants commissioned after 4 July 2019, new plants with a Final Connection Offer that were not operating on 1 December 2025, and new plants that will receive one, provided they hold a sale contract or an operating support contract; also self-consumption PV and PV selling in the market without support",
      "Provision": "art. 11Γ par. 1 and 4, Law 4685/2020"
    },
    {
      "What": "Minimum capacity",
      "Rule": "usable capacity of at least one hour at the PV plant's installed power",
      "Provision": "art. 11Γ par. 1"
    },
    {
      "What": "Where the request goes",
      "Rule": "to the Licensing Body for RES and High-Efficiency CHP or to the competent operator, as the case may be",
      "Provision": "art. 11Γ par. 1"
    },
    {
      "What": "Payment",
      "Rule": "the sale or support contract stays in force for the energy from the PV units; energy from the battery is paid at day-ahead and other market prices, measured by a separate certified meter",
      "Provision": "art. 11Γ par. 2 and 3"
    },
    {
      "What": "Limit when charging from the PV only (par. 11A)",
      "Rule": "a permanent cap of 40% of installed power from 07:00 to 19:00, no permanent cap from 19:00 to 07:00",
      "Provision": "art. 11Γ par. 5.α(a), as amended by Law 5299/2026"
    },
    {
      "What": "Limit when also charging from the grid (par. 11B)",
      "Rule": "the hourly injection limits for storage stations on the transmission system, until more specific limits are set",
      "Provision": "art. 11Γ par. 5.α(b); ΥΠΕΝ/ΔΑΠΕΕΚ/53563/1556/2023, art. 4"
    },
    {
      "What": "Permit amendments",
      "Rule": "the Producer Certificate, the Final Connection Offer, the environmental permits and any other permit are amended with priority",
      "Provision": "art. 11Γ par. 4"
    },
    {
      "What": "ΔΕΔΔΗΕ: requests after 30 November 2025 that take new grid capacity",
      "Rule": "examined only after the 900 MW for standalone storage on the distribution network is used up, except the \"Storage Systems in Businesses\" programme",
      "Provision": "art. 11Γ par. 4, as amended by Law 5299/2026"
    },
    {
      "What": "Shared connection point",
      "Rule": "a joint request for a storage station sized up to the PV plants' combined installed power; on the transmission system, absolute priority up to 1,000 MW until the merchant battery ranking decision",
      "Provision": "art. 11Γ par. 5 and 5.δ, as amended by Law 5325/2026"
    },
    {
      "What": "Letter of guarantee",
      "Rule": "required for every application; based on maximum generation power (par. 11A) or maximum injection power (par. 11B)",
      "Provision": "art. 11Γ par. 5.γ, as amended by Law 5299/2026; art. 6, Law 4951/2022"
    },
    {
      "What": "Fire safety",
      "Rule": "the measures of sections Στ.1 and Στ.2 of Annex Β of ΥΠΕΝ/ΔΙΠΑ/103448/7298/2024",
      "Provision": "art. 11Γ par. 7"
    }
  ]
}