Re purposeing kitchen equipment

I have an old airfrier that still works, but not in the good enough condition to pass to a charity shop, as it has some broken parts, though safe to use, I used it to sterilise some soil, switching it on for five minutes was long enough to take the soil up to a temperature of 60c, not sure what the cost would be with using it but, will use it again when the sun is out and I have power coming from the solar panels