Here it boils down to:

• Network power (fixed fee based on your max power needs, depends on time as well, can be 3.6€ / kw in winter months)
• Network energy transfer (fee for energy transfered, here its about 0.018€/kwh)
• Energy (fee on the energy used, about 0.146€/kwh right now)
• VAT
• some bullshit for maintenance and running an open market portal for companies to buy/sell energy (like 1-3€)