This 75 watt solar panel from Siemens is a rigid and strong module. They call it the SP75, 75 Watt Monocrystalline 12V Solar Panel from Siemens.
It is a high-efficiency solar module.
The 75 watt solar panel comes with built-in by-pass diodes. This is to stabilize system performance during partial shading conditions.
It does not have a controller or z-brackets for mounting.
The 75 watt solar panel comes with FM certification which makes it ideal for off-grid applications.
FM certification confirms that the SP75 solar module conforms to a high standard of safety.
They use a heavy-duty corrosion-resistant anodized aluminum frame. This ensures a safe and stable performance during harsh weather conditions.
You can run these solar panels for decades. The modules will operate faultless.
With a possible loss of 15% you can get an output of 440 watt during a 7 hour day in mid summer.
Max Power: 75W.
Open-Circuit Voltage (Voc): 21.7V.
Optimum Operating Volts (Vmp): 17V.
Optimum Operating Amp (Imp): 4.4Amp.
Short-Circuit Amp (Isc): 4.8Amp.
Dimensions: 1200mm x 527mm x 34mm
(47.25" x 20.75" x 1.25")
The 75 watt module has a limited warranty for 25 years on power output.
Any other situation where you need to keep a 12-volt battery charged up and ready for use.
Some people complain that they do not get the greatest
output when using the panels. We must remember though that ideal condition is
mid-summer. Also when the sun shines perpendicular to the panel.
The real output varies depending on where you stay and
what season it is.
If you want to angle it, you will have to mount brackets on the short length. You have to drill holes yourself then, but it is quite an easy job. Be very careful when drilling, though.
For a good working condition the cables must be maintained proper.
Use a damp cloth to clean the surface regularly to prevent a drop in efficiency.
It is better to get a professional to do other maintenance functions.
The 75 watt solar panel has an excellent watt/dollar value.
The solar module from Siemens produces a usable output and it comes with a safe and stable design.