...as a former small town mayor, for a town with it's own electric distribution and billing to our customer/residents, I can tell you that the question of 'why is my bill so HIGH this month!' comes up quite often, especially if you have an insurance office downtown where folks don't mind stopping by and 'complaining' to the mayor! (one reason why I eventually saw the writing on the wall and decided that being the 'mayor' was a better position for someone else)...
Once, I had a lady stop by and swear that her electric bill was 'artificially' high, and we at 'city hall' had a special 'button' to press to make her pay more!
When I politely questioned her assumption, she made comments that her 'neighbor' didn't have near the high bill as she did, and nobody should be paying 'these high prices' just for electricity. I asked her what might be causing her spike in usage. She had no clue, but to maintain her swearing that it 'had to be' city hall doing it to her.
Later that day, as I drove by her home on the way to my home, I noticed her front door open. I stopped and knocked on her door to have a further conversation, and while she never responded, I noticed that her A/C unit was running full blast near the end of the house. It was also a humid 95 degrees.
You get the picture. And, no, her neighbor didn't her door open and her A/C unit wasn't even running. You can't 'compare' your bill to your neighbors.
Another customer called and complained. She said that she shouldn't have to pay such a high rate when she hardly uses electricity at all! Hmmmm. I asked her what size her home was. She wasn't sure, but she said "it's not that big, smaller than most...". I asked her how her Propane heating was doing during these cold winter months. She responded that she didn't have any propane, everything was electric.
I may now see the problem.
Everything is relative, but everything electrical cannot be compared to your neighbor, or sometimes even to your OWN previous bill, as weather, temperatures, humidity, usage, your own preferences for inside temperatures, and whether you are 'all electric' will certainly come into play, even from month to month. Electricity is not a 'static' power source, as the owner actually has everything to do with the bill, NOT the electrical supplier(the utility), as their rate is generally the same, and consistent. If a 'spike' in a monthly bill is questioned, it's most commonly a 'spike' in usage during that previous billing cycle, and probably not anything to do with what's happening 'today'. Having an HVAC unit installed is most likely part of the reason.