Our electric supply is a bit rural too. When we moved in, we were smart enough to put our cooking and weater heating onto gas. True, we have to lug the gas bottles about but we don't have circuit breakers popping all the time.
The hot water isn't as hot in winter as in summer. Insulation is not common in our part of the world so we were not at all surprised that the water was cooler in the colder months. It had to pass through all that cold earth. We weren't surprised either that the water got hotter more quickly in one bathroom than the others - more cold ground = cooler water for longer.
We've had some lovely weather recently. High 20s and sunny so and I was a bit surprised that the hot water was more like tepid water. Shower time was not a pleasure. Grease stuck obstinately to the cutlery as we washed up. It took us days to decide that it wasn't just rural it was a problem. I tried some home solutions but, eventually, we called Jesús, the plumber. At first he was stumped too. We had water, we had gas, the boiler was lighting up, why was the water not hot enough? He found the fault though, an intermittent fault. He's fixed it now and the water is scalding hot.
It's amazing how luxurious it feels to have hot water.