Description
pvlib/pvlib-python#1147 and pvlib/pvlib-python#1150 changed the object oriented api for the new multi-array inverter functions. Now you just pass "sandia" or "pvwatts" and the objects determine which function they should call. So SPI needs to update PVWattsInverterParameters._modelchain_ac_model and SandiaInverterParameters._modelchain_ac_model. The change is available in v0.9.0-alpha.2