Can a battery repair the economics of solar in Poland?

As PV penetration in Poland grows, mid-day power prices keep falling, reducing the market value of solar generation. In his latest post, Gabriel Ziembicki, co-founder of FlexPlum, looks at a simple but effective countermeasure: adding a battery to a PV asset.

Key takeaways

• 📉 The market value of PV is increasingly eroded by mid-day price cannibalisation
• 🔋 Co-locating a battery allows the same energy to be sold at better prices
• 📈 For a representative 1 MWp PV asset (2025 YTD):
  • 230 kPLN/MWp – PV only
  • 342 kPLN/MWp – PV + battery
• 👉 That’s a ~49% increase in captured value, achieved purely by re-timing energy

From the post

“The same MWhs, but monetised better.”

“Negative or near-zero price hours are largely removed from the PV revenue stack.”

Even with a very simplified dispatch (shifting energy from the two cheapest to the two most expensive hours each day), the impact is clear. More advanced optimisation across day-ahead, intraday and balancing markets can unlock even more value.

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👉 Read the full post to see the charts, assumptions, and deeper discussion: How co-located BESS may improve the value of Solar energy

At FlexPlum, we focus on battery valuation and optimisation to help investors defend revenues and maximise returns from energy storage assets.

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