Guessing the weather, with solar installation.

[ericmark]

Top with 3.2 kWh battery, bottom with 6.4 kWh battery. Clearly an improvement, unlikely to run out of off-peak or solar on most days, the 3.2 kWh gave me around 5 hours after off-peak or solar stopped, but 6.4 kWh clearly around double, so most days will reach the off-peak turn on time before the battery runs out.

But yesterday for example just no solar, and battery needs some solar to reach when next off-peak starts. Now I only need two hours to recharge batteries from the off-peak, so I could switch off charging two hours earlier, but with bad days I would lose out.

2 hours = approx 1.4 kWh so only talking about the difference between the two rates, so 22.36p per kWh or 31p approx extra if we run out of battery, but loss is since not paid for export, hard to work out, today 4.5 kWh given away.

I am thinking, just give away the supless, but others must have same problem, so interested to hear what other people do?

 

[Why Not Indeed]

I put my coordinates and PV system details in to Home Assistant and it uses the weather forecast to predict solar production in the energy dashboard.

Forecast.Solar

Instructions on how to integrate Forecast.Solar within Home Assistant.

www.home-assistant.io

Never actually tested the forecast against reality. This is what it says for tomorrow: