Sounds like it. Or they have waaay too many lights and/or electric toys/appliances, and/or
keep the place waaay too hot or cold.
If growing, consider -
switching to LEDs and
physically dividing the grow area and alternating lighting so one 1/2 is "on" while the other 1/2 is "off" (and vice versa) to avoid usage spikes that trigger rate increases.
Someone is growing weed
That was my first thought, those lights, $800/mo?
That will do it.
Sounds like it. Or they have waaay too many lights and/or electric toys/appliances, and/or keep the place waaay too hot or cold.
If growing, consider -
switching to LEDs and
physically dividing the grow area and alternating lighting so one 1/2 is "on" while the other 1/2 is "off" (and vice versa) to avoid usage spikes that trigger rate increases.
😉