As I see it there is a certain amount of sun energy hitting your roof, and you can collect it with a large
number of nearly flat panels, or a smaller number of panels tilted up to a better angle with proper
shade avoiding spacing. Like a fresnel lens. There are trade offs. Tilt causes engineering costs and
issues, and the spacing will not always be close to optimal. Panel cleaning and snow clearing.
If your panels are near flat, the peak power will be reduced by the cosine of the best sun angle
to perpendicular, and you can calculate the most inverter required to cover it. It will be a lot less
than the total of the panel test rating. There is also the issue of your AC power connection, you
are approaching the limit of what is considered economical and good practice. The limitations of
the AC side of my system (2 inverters) has caused most of my issues.
If your roof has enough space for 7.6KW inverter clipping, orienting panels somewhat east and
west can spread the 2 power peaks out to eliminate clipping.
If you can get to ground mount, its a new ball game. Bruce Roe
number of nearly flat panels, or a smaller number of panels tilted up to a better angle with proper
shade avoiding spacing. Like a fresnel lens. There are trade offs. Tilt causes engineering costs and
issues, and the spacing will not always be close to optimal. Panel cleaning and snow clearing.
If your panels are near flat, the peak power will be reduced by the cosine of the best sun angle
to perpendicular, and you can calculate the most inverter required to cover it. It will be a lot less
than the total of the panel test rating. There is also the issue of your AC power connection, you
are approaching the limit of what is considered economical and good practice. The limitations of
the AC side of my system (2 inverters) has caused most of my issues.
If your roof has enough space for 7.6KW inverter clipping, orienting panels somewhat east and
west can spread the 2 power peaks out to eliminate clipping.
If you can get to ground mount, its a new ball game. Bruce Roe
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