Hello Friend,
It is a good idea to sleep when there is a power cut, although power cuts are rare in our city, even if it go off, I have a 2 KW power inverter installed at my house due to which power cuts are not even detected. I have no plans to sleep during the day. And sometimes he slept for maximum 1 hour.
You are right, sleeping provides us energy.
Thank you for your very meaningful comment and blessings.