A.I. Explanation:

Option 1: "They are installed at a higher cost."

Explanation: The text mentions that inverters are available at an affordable cost, which contradicts this option. Therefore, this statement is not supported by the text.

Option 2: "They have less fuel consumption."

Explanation: While the text states that inverters work without fuel, it does not imply that they have less fuel consumption. This option is misleading and does not address any disadvantages.

Option 3: "Their battery has a life of few years."

Explanation: The text clearly states that the battery has to be replaced after a few years, indicating a limitation in the lifespan of the battery. This directly points to a disadvantage of installing inverters.

Option 4: "They are absolutely noise free."

Explanation: This statement is true according to the text, but it does not represent a disadvantage. Instead, it highlights an advantage of inverters.

Option 5: "They work for limited hours of electricity cuts."

Explanation: The text specifies that inverters do not work for longer electricity cuts as their battery charging is limited to a few hours. This limitation is a clear disadvantage of using inverters.