"generator:method"=>"photovoltaic","generator:output:electricity"=>"small_installation","generator:source"=>"solar","generator:type"=>"solar_photovoltaic_panel","location"=>"roof"
"generator:type"=>"solar_photovoltaic_panel","generator:method"=>"photovoltaic","generator:source"=>"solar"
"generator:method"=>"photovoltaic","generator:source"=>"solar"