Peru uses 220 volt, 60 cycle electricity. Travelers will require a voltage converter for 110 volt devices. Plugs are typically the 2 pronged flat type found in the US, though some facilities have been noted to use the 2 rounded prongs instead. Pisac Inn has flat and rounded prong outlets.
It is best to have local currency; however, most restaurants, hotels and other service providers readily accept US dollars as long as they don’t have any rips. They will generally give you change in local currency. The local currency is the Peruvian Soles (PEN). It is better to use local currency in markets, as you will have smaller denominations to purchase and tip with and don’t need to worry about your currency looking pristine (ripped Soles are common and readily accepted).
See the Currency Converter for exchange rates http://www.xe.com/currencyconverter/convert/?Amount=1&From=USD&To=PEN.
There are no banks in Pisac, they are in Cusco, mainly on the main street (Avenida del Sol). It is best to change money at official money exchanges “casa de cambio” rather than on the street, or the bank for a better exchange rate. There are many places to change your money (dollars) into soles in Pisac. In Cusco you will get a slightly better exchange rate, and there are seval options near the main plaza. Please note that dollars need to be in perfect condition to be accepted; ripped or worn bills will not be exchanged, and if accepted, it will be for a much lower exchange rate. You can also change Euros or English pounds although sometimes the rates are not very good. Traveller’s checks are more difficult to exchange, and not recommendable.
Most travelers bring US cash with them and withdraw from ATMs as they need it along they way. ATMs are readily available in the larger towns and cities. Pisac has several ATM machines where travelers can withdraw US dollars or local currency at fair exchange rates. Make sure you have your PIN number, as dealing with these issues in Cusco is time consuming. Sometimes the signal in Pisac goes down and the ATM’s don’t work. Traveler’s checks are fine, but they can be more difficult to exchange and you will usually receive a poorer rate or be charged an additional fee. Credit cards are accepted in most restaurants, hotels and stores, and sometimes in smaller establishments they may charge an additional percentage (3 – 6%). Although it is helpful to bring a credit card along for emergencies, don’t count on using it for most purchases. You may want to inform your bank and credit card company that you will be travelling to Peru.
Check with your cell phone provider. Each company is different and they can give you the most up-to-date information.