How we pick when to charge and sell
Each day we look at that day's hourly prices and choose the hours to buy and sell that make the most money after wear. The battery can only charge or discharge so fast, can only hold so much, and we allow one full charge per day. We treat it as too small to change the market price.
- You lose some energy
- For every 100 units taken from the grid, 87 can be sold back. The rest is lost as heat when charging and discharging.
- Empty every morning
- The battery starts the day empty and must finish empty. A real operator could keep energy overnight. We also only allow one full charge from the grid each day.
- What the costs are
- Wear of 5 € per MWh charged is included when we pick the hours, so we skip days where the price gap is too small. Capex for the 1 MW / 4 h battery is assumed at 1,000,000 € (250 € per kWh), spread over 10 years. Opex is 10 € per kW each year. Payback is how long trading takes to cover the full capex — not just that year's share.
- What Annex 1 is
- Annex 1 is a proposed reform of Montenegro's balancing capacity price, from the Enfidal report. It is not a second market and not extra wholesale trading. Today the TSO pays a fixed regulated fee (18,299 € per MW-year for mFRR). Annex 1 would instead pay a slice of a Hungarian wholesale reference — 108.53 €/MWh × 8,760 hours × an opportunity-cost factor (5–15%). The report's midpoint is 7.5%, which is 71,304 € per MW-year. Only the availability payment changes; wholesale and activation stay the same.
Loading…