Check with your energy provider to see if they're having service issues. Are you running too many appliances simultaneously? And at peak times? I replaced the electrical box on my 30-yr home last year and my energy bill been substantially lower since then.
Our electricity went out for an hour from about 9-10pm. I guess someone hit a pole and destroyed it....one of those big one's. Anyway, we have 7 smoke detectors and they started to talk, "battery is low", and beeping. Our dogs were wigged out. I don't know how to change them. I want to rip the batteries out, except we have such high ceilings, I can't get to them easily. However, about an hour or so after the power came back on, they quieted down. So much for safety lol. Now, we have our pool, yard lights, inside trees uplighted (all on timers). Plus, all our clocks, sprinkler system, etc. It is a pain. I understand the hitting the pole thing, but, in general, we have too many outages in our neighborhood.