Being discreet about what you show might be important if you want to keep it a secret.
If you insist on having every light in your home on, it's going to stand out like a bonfire on a dark night. You could remove all the lightbulbs in all/most of the rooms, or use flashlights (which you could recharge).
Without most people knowing, you could keep your refrigerator and freezer running, some fans if it's hot, an electric stove would work fine. Who's to know if you don't shoot off your mouth?
Think of it as walking down the Las Vegas Strip with $50,000 in cash on you. If you have $100 bills fluttering from every pocket and handing them out to every beggar you pass, someone is going to take a closer look. Stupidity does have it's taxes.
But you probably couldn't keep it a secret forever, esp if you have children (the little pitchers with big ears are often the ones who let the cat out of the bag, if I may mix my metaphors).
So plan for that.
The woman across the street has a baby and needs formula kept cool, so you might offer to do that, warning her to keep quiet. The guy next door might be a diabetic, and if he can't keep his insulin cold, he dies in 10 days or so.
You might have enough friendlies around that they would help you gradually let out the knowledge that you have power, and as long as everyone minds their manners, you will help them.
Or, someone will just get p'd off because you have something that they don't, and torch your place. You never know until it happens.
Just remember that without help, you can't stand guard forever.