1. Start with the price you receive
The day-ahead market operated by the Independent Bulgarian Energy Exchange (IBEX) provides price information for the following day. The exchange price may differ from the amount you receive for the electricity sold. Check how your buyer applies fees, balancing charges and other deductions. A fixed-price contract may call for different control rules from a contract that follows the market.
Then set the minimum acceptable export price. Use the same units and time period for every comparison. A price in EUR/MWh applies to energy; the inverter power in kW determines how quickly you can sell it.
2. Choose a price threshold or a sales schedule
A price threshold is useful when your main goal is to limit sales during unprofitable intervals. A schedule adds time windows, power levels and days off. The PV plant can then follow a specific plan, while the operator sees the next change.
Telesolar plan S stops sales below a chosen price. M adds a basic sales schedule, price-following and buyer notifications when sales deviate from the schedule. L adds a detailed schedule that accounts for consumption, the battery charge carried over from the previous day and the solar forecast for the next three days. Planning combines published prices with forecasts for future days.
3. Match the plan to the available energy
Without a battery, sales are limited by current generation and on-site consumption. Energy storage batteries let you move some of the generated electricity to another interval. The benefit depends on the price difference, charging and discharging losses, and the cost of using the battery.
Check the available capacity, permitted power and discharge time. A large capacity does not mean that all the energy can be sold within a short evening window. XL adds planning with a minimum battery charge and automatic submission of forecast schedules.
4. Check execution as well as the plan
Inverter monitoring shows actual power, while historical data helps you compare planned and sold energy. Follow the measurement timestamp, command acknowledgement and deviations from the schedule. These provide a basis for adjusting the next set of rules.
- Collect the inverter models and power ratings, battery details and electricity purchase terms.
- Try different daytime and evening prices in the calculator and see which limits determine the result.
- Choose a plan for the control you need and send us the details of your PV plant.