in the UK if you pay for your power on time, then unless you let yourself get screwed over, then it's near impossible to be busted because of that.
to start with article 8 of the european code of human rights states that you are entitled to your private home life, paraphrased there and abouts

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basiocally meaning even if the electricity company do knock on your door demanding to know why you are using 10,000w of electricity, you can simply tell them beacuse you are, and to go away. end of story. you are never under an obligation to tell them why your usage is high. you can tell them it's AC and computers etc, or you can tell them nothing. the latter will of course raise suspicion, and possbily lead to police involvement, but this police involvement is from the ground up, they basically now have a possible suspect, but they still need to find all their evidence as with any other search warrant.
i can only speak for the UK, but people are WAY too paranoid about what they can be busted for. for example, a search warrant is not valid purely on the grounds of a heat signature, you could have 10,000w of heaters in the attic because why not, if the police were to obtain a warrant, even the cheapest lawyer in town would have the case thrown straight out into the street, again going back to article 8. the police cannot serve a warrant on an assumption and have it stand up in court. that is not how it works however flawed the system may be.
so ukgrower, you need to do nothing of the sort. you can jsutify your bill in any of 100 ways and there is nothing the powers that be can do to take it any further other than act on the new suspision and find new evidence to work hand in hand with the high usage.
as an example, i am running around 1.5kwh just in the act of replying to this thread. you can exmplain high power usage in any amount of ways. hell, you could say you have 25,000w of air conditioning because you are carrying out a personal study on whether you'd enjoy living in the cold for 12 months.