Experts recommend using an energy monitoring system for about 12 months to determine accurate power consumption patterns, which helps in deciding the quantity and size of solar panels needed. What are the recommended brands and price ranges and where to obtain such a monitor?

Here are a couple of devices from Shelly:

 

Energy Metering - Shop - Shelly

 

Shelly has at least one App. And you can use some of them, or maybe all of them, also with Home Assistant.

I use Shelly devices with Home Assistant.

 

Not sure how long you've lived in your place, but you can find your monthly usage from you electricity bills.

If you are into DIY electronics, you can visit the Alternate Energy Forum or Electrical forum (can't remember which) and make your own using Crossy's design. 🙂

 

2 hours ago, carlyai said:

visit the Alternate Energy Forum

Thank you.