Yes, its a luxury, but when those blackouts occur [during World Cup Finals] , one swears by their father's garden that they will invest in solar the next day !!!
In 3-5 yrs [as per guarantee of battery life] - you will invest another 60-80k in batteries [inflation factored in]
In 15 years ..... 15 years too far, we will probably be running our appliances on an infinite charge helium cell