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The sustained future growth of renewable energy in the distribution networkis governed by its financial viability. The recent subsidies in Flanders forphotovoltaic (PV) and battery are used to calculate the payback period onprosumer investment in residential PV, battery and inverter installations.Realistic scenario of PV, battery and inverter are created based on the marketcatalogue of one manufacturer per product. Using these scenarios, one-yearsimulations for a residential prosumer are conducted in a rolling horizon.Luminus, an energy service provider in Limburg, time-of-use and feed-in-tariffcontract rates are utilized. The numerical evaluation indicates that thepolicies prefer new PV installations. The subsidy comparison for 2021 to 2024is also conducted. Oversizing PV compared to inverter size increasesprofitability. Batteries performing only arbitrage may not attract muchinvestment, as the payback period is high. This shows the need to maximize thevalue addition of prosumer investment on residential batteries by participatingin multiple goals.

Impact of subsidy on profitability of residential photovoltaics, battery and inverter in Flanders