Blog
Analyses and case studies based on real energy data.
The battery that charges from the grid: a real month at an industrial site
An industrial site with 169 kWp of PV and a 672 kWh battery paid PLN 5,513 less in July 2026 than it would have without the battery. Not a simulation - a month that actually happened. Almost 40% of the saving comes from the capacity fee, and the battery charged 85% from the grid.
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When a dynamic tariff does NOT pay off
An honest case study of a net-metered prosumer. On 35,000 real measurements we show a house for which switching to a dynamic tariff costs almost PLN 8k a year - and a battery only pays off once net metering expires.
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Human vs algorithm: manual battery control vs AI
A commercial site ran its 1 MWh battery by hand for a month. We compared its manual schedule with optimal AI control on the very same real data - and measured how much more it could save: +34%.
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The Polish capacity fee: how it works and how to cut it
What the Polish capacity fee is, who pays it and how the daily K1-K4 formula works. Why it is not only how much grid energy you draw that counts but also when - and why dropping from K4 to K1 cuts this bill line by 83%.
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AI forecasts for the entire Polish grid (KSE)
We forecast TGE electricity prices, PV- and wind-farm output and grid load, and benchmark our load forecast against the official PSE forecast. See how our forecasting works.
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A home battery for Adam
Using 12 months of real data we compared five scenarios - the G11, G13 and dynamic tariffs plus 30 and 50 kWh storage. How much can really be saved, and when the investment pays off.
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