Can someone help me figure out what’s using all our energy at home?

Just installed solar. It’s now in the 70s weather in NorCal so all our windows are open and we’re not using AC. My family went to church and I checked our usage on the Tesla app. The house was using 7.4kW! No TVs or computers were left on. Washer, dryer, and dishwasher were not running. At night when we go to bed, we have the same set up (no lights, no appliances running except for fridge, no AC), and it’s usually >1kW.

How come the house is using 7-8kW during the day but less than 1kW at night with the same setup?

Thank you!