Question: Name the 20 years for 1600 kwh/kw p y is 8.8
SQL: SELECT "20 years" FROM "1-15677755-1" WHERE "1600 kWh/kW p y" = '8.8';

Question: Name the 1800 kwh/kw p y when 2400 kwh/kw p y is 5.8
SQL: SELECT "1800 kWh/kW p y" FROM "1-15677755-1" WHERE "2400 kWh/kW p y" = '5.8';