Credits EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 EAc2 Helps non-experts to quickly obtain performance estimates for grid-connected PV systems. Resource type Web Tools Link http://rredc.nrel.gov/solar/codes_algs/PVWATTS/version1/