Introduction #
The Qilowatt Optimizer requires correct price parameters to make the right control decisions. Entering incorrect values may cause the system to behave unexpectedly or use the wrong price signals. This guide explains how to configure purchase and sales margins as well as VAT.
Prerequisites #
• Qilowatt account created → Creating a user account
• Device connected to WiFi → Connecting a device to WiFi
• Inverter added to the Qilowatt app → Module setup
• Solar plant and battery data correctly configured → Solar inverter setup
• Device connected to WiFi → Connecting a device to WiFi
• Inverter added to the Qilowatt app → Module setup
• Solar plant and battery data correctly configured → Solar inverter setup
Step-by-step Guide #
1. Purchase margin #
The purchase margin consists of three components:
a) Margin added by your electricity seller to the market price
b) Electricity excise duty
c) Renewable energy fee
a) Margin added by your electricity seller to the market price
b) Electricity excise duty
c) Renewable energy fee
1. Purchase VAT #
• Private customers pay VAT on the purchase price (from 01.07.2025 → 24%).
• Companies do not pay VAT (0%).
• Companies do not pay VAT (0%).
1. Sales margin #
• The sales margin must be negative.
• This is the commission paid to the energy buyer.
• If the sales margin is 0.007 €/kWh, enter -0.7 s/kWh.
• If you receive renewable energy subsidies (plants commissioned before the end of 2020), enter 0.
• This is the commission paid to the energy buyer.
• If the sales margin is 0.007 €/kWh, enter -0.7 s/kWh.
• If you receive renewable energy subsidies (plants commissioned before the end of 2020), enter 0.
New sales prices are generated based on the margin. If the price becomes negative, sales are automatically limited from 0 €/kWh. Subsidy recipients and non-recipients have different break-even points.
Result #
New sales prices are generated based on the margin. If the price becomes negative, sales are automatically limited from 0 €/kWh. Subsidy recipients and non-recipients have different break-even points.
If it Doesn’t Work #
• If the system does not respond as expected, check the margin values.
• If sales happen at a loss, ensure that the sales margin is entered as a negative value.
• If the problem persists, contact the Qilowatt support team: support@qilowatt.eu
• If sales happen at a loss, ensure that the sales margin is entered as a negative value.
• If the problem persists, contact the Qilowatt support team: support@qilowatt.eu
