Electricity outlets: 220 volts – 50 Hz AC. Two-pin standard European plugs will fit all outlets. You will need adapters and transformers.
Electricity rates in Germany are among the highest in Europe. The easiest thing to do is register with your local electricity supplier, but you can also chose from a range of alternate providers. There are often major price differences depending on which company supplies your electricity. Some suppliers offer discount tariffs late at night (Nachttarif) and you can also make ecological choices (such as environmentally-friendly electricity or nuclear!) There are consumer advice centers and websites that provide information on electricity and costs, including www.billig-strom.de , www.stromtarife.de and www.stromtip.de .