S Bengi wrote:
It's usually cheaper and better to just install more solar panels on the roof vs fussing about tilt angle or worse solar tracking.
Once found an app with its location always defaulting to Spain. The all around optimum angel it gave was horizontal, all year around. Great output but also a lot of cleaning.
A 10degree tilt angle is enough for the solar panel to be self-cleaning.
For example, when I set my tilt angle to 25° - a pretty large deviation from the optimal tilt - it results in only a 1% reduction in overall annual power generation.
Why is this? Buffalo is often fairly cloudy, which means that diffuse light plays a large role in the power generation for my system. Because the light is diffuse, it doesn’t matter as much if the panels are perpendicular to the sun.
Those links are like a treasure chest for me...
Mark Brunnr wrote:BuildItSolar has a list of sites here: https://builditsolar.com/References/SunChartRS.htm one of those might have some info for you.
There are sites like https://unboundsolar.com/solar-information/sun-hours-us-map which give some general numbers for the annual average hours per day. I would think that it really depends if you are doing this on-grid or off-grid though, as on-grid it's usually about generating the most power on average and filling in with grid power otherwise.
you will not damage the panel by shorting it through a heater.ake sure the heater is made for the load and it does not have any kind of fan which would be voltage sensitive. Always remover your power math : voltage is just potential it's not power. So power (in watts) is voltage x current.
Tony Masterson wrote:Will the output voltage always be stable at 16.5 volt but the current depends on the brightness of the sun?
If yes, does it really matter how big the load is?
To put this to the extreme, if I would connect a 12v, 2kW heater would it just heat between 0-100Watt depending the brightness of the sun?
Or will that damage the panel.
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