I’ve installed the new forecast.solar integration in 2021.7 and it seems to work, but its estimates are way off.
For instance – today is a nice sunny day and with my total installed power of 8700W, I get an estimate of 17kWh for the day, but the actual is more like 50 kWh. I’ve been monitoring it for the past few days, but it doesn’t seem to change its estimates much… I’d hate to “inflate” the total installed power to get the estimates closer.
I verified azimuth and declination (210 & 37) as well as lat/long.
What am I missing??
Same in my case here too. Not sure if it’s an error on my part, but there arnt many things to get wrong.
Double check your location is correct, and make sure you’ve understood the azimuth as different sites use a different start point for the meaning of azimuth.
I got in touch with the forecast.solar guy(s) themselves and they fixed it on their end. Was a calculation problem. My numbers look much better now. 
2 Likes