Payvasti parallel dar elektrotekhnika, payvastani elementkhoi duqutbai zanjiri elektrist (istemolkunandahoi khud manbahoi energiyai elektr), ki ba qutbhoyash shiddati buzurgiash yakkhela tasir mekunad. Payvasti parallel asositarin usuli vasl namudani istemolokunandahoi energiyai elektr meboshad.
Dar vaqti Payvasti parallel az zanjir chudo kardan yo khud ba zanchir payvastani istemolkunandahoi chudogona kori istemolkunandagoni digarro khalaldor namekunad. Quvvai charayon dar zanjirhoe, ki parallel payvasta shudaand va khudashon manbai QED nadorand, ba muqovimati noqilkho chappa mutanosib ast. Dar Payvasti parallel hamai quvvai jarayon ba chami quvvai jarayoni har yaki shokhaho (baroi jarayoni doimi — summai algebravi, baroi jarayoni tagyiryobanda — summam vektori) barobar act.