So you have consumed 0.7 Kwh over 8 hours @SPECIAL LOCATION suggests that a load of 50 - 100+ watts could be consumed by 24 / 7 appliances but mentioned no time period so it could be assumed that the load mentioned is 0.05 - 0.1Kw per hour therefore hitting your 700w used over 8 hours.That is very interesting, thank you. It confirms exactly my point and situation.
Last night, after being out all the sunny day, I had a full battery of "free" solar electricity so I confidently connected the fridge freezer and the separate freezer to my solar battery, thus isolating them from the mains.
That left only 3 phone chargers, the house alarm, one security camera. I set the CH thermostat to 15 degrees so no CH pump use.
This morning at 8am my Smart Meter showed 700w usage since midnight!
Based on your figures, allowing for 100w of usage by the items we list, that is 600w of phantom use. That's 1.8kW over 24 hours, 657kW per year at my tariff of 27p per kW plus VAT = £186!
The next few nights I am going to isolate each circuit on the consumer unit in turn to try to identify the rogue item.
While looking for the loads that are causing you to stress have you considered what earth leakage your installation may have
I think the only way you can resolve you problem is to turn off the main switch and live off grid on solar only
It shows a load is being drawn in real time, I'm wondering how many watts your IHD consumes in a 24 hour periodMy Smart Meter shows usage in real time. If I boil a kettle, the usage shows immediately on the meter.