This week in Austria saw significant fluctuations in electricity prices and weather conditions that could have made or saved homeowners with home batteries a considerable amount of money. For those who own a battery system like the one you might have—a 10.0kWh capacity—the optimal strategy for charging and discharging your battery based on real-time spot prices would have earned you an impressive 10.39 EUR compared to just 2.19 EUR with a basic timer setup. That's a staggering increase of 373% in revenue, or an additional 8.19 EUR per week. Over the course of a year, this could translate to approximately 426 EUR.
The best day for maximizing earnings was May 28th, when you could have earned up to 236 ct/kWh by discharging your battery during peak hours. The spread between the lowest and highest prices on that day reached an impressive 32.7 ct/kWh. Conversely, May 27th was less profitable with a mere 15.9 ct/kWh spread.
The weather this week played a significant role in optimizing earnings. With an average temperature of 21°C and 69 hours of strong sunshine (over 400 W/m²) out of the total 192 hours, there were plenty of opportunities for solar panels to generate power at no cost. This free charging allowed homeowners to store energy during sunny periods and sell it back to the grid when prices are high in the evening.
Here's a daily breakdown of how you could have maximized your earnings:
- **May 25th**: Average price was 8.3 ct/kWh, with a spread of 22.9 ct/kWh. Optimal earnings were 184.3 ct. - **May 26th**: Averaging at 10.1 ct/kWh and a spread of 22.5 ct/kWh, you could have earned 169.8 ct optimally. - **May 27th**: With an average price of 9.1 ct/kWh and a spread of 15.9 ct/kWh, the optimal earnings were 134.3 ct. - **May 28th**: The standout day with an average of 11.7 ct/kWh and a peak spread of 32.7 ct/kWh, earning you up to 236.0 ct optimally. - **May 29th**: Averaging at 10.0 ct/kWh and a spread of 22.7 ct/kWh, optimal earnings were 170.4 ct. - **May 30th**: With an average price of 8.9 ct/kWh and a spread of 16.9 ct/kWh, you could have earned up to 143.6 ct optimally.
By understanding the interplay between electricity prices and weather conditions, homeowners can strategically charge their batteries during off-peak hours when solar generation is high and discharge them during peak times when prices are highest. This not only maximizes your earnings but also helps you save on energy costs by reducing reliance on grid power during expensive periods.
If you have a battery, smart timing based on spot prices and weather forecasts can significantly improve your returns. Tools like those provided by Lavant Systems offer AI-driven optimization that takes the guesswork out of maximizing your home battery's potential.