Solar panels should face true south in the Northern and Western hemisphere which will vary quite a bit from compass south depending on your location. One of the biggest mistakes I see new off gridders make is not using proper panel orientation and tilt to maximize production.
Sadly panels take up a lot of room. With 20 foot wide, the best you could do would 6 panels across. Depending on how deep the roof is, you may be able to have 2 rows, so 12 panels. If so, you may be looking at 3,500 to 4,000 watts of panels. Its a start but most people are happier with 5 to 6K of panels. Gives a better chance of charging batteries on cloudy days
Solar panels should face true south in the Northern and Western hemisphere which will vary quite a bit from compass south depending on your location. One of the biggest mistakes I see new off gridders make is not using proper panel orientation and tilt to maximize production.
neto my house was on 6x6s i been working on putting a roof over my deck an put panels on it up 20 ft
Sadly panels take up a lot of room. With 20 foot wide, the best you could do would 6 panels across. Depending on how deep the roof is, you may be able to have 2 rows, so 12 panels. If so, you may be looking at 3,500 to 4,000 watts of panels. Its a start but most people are happier with 5 to 6K of panels. Gives a better chance of charging batteries on cloudy days