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7 Things You Didn’t Know About Solar Energy
Too Many Parts
A single solar panel contains 60 fragile solar cells and a 4.5 kW system contains 1,500 cells. That means there are at least 1,500 problems you can have with the performance of the system at any time. The thousands of soldering points used to connect cells are thin, fragile and very susceptible to warping from excessive heat from the sun.
Solar panels are made of fragile glass which can break quickly from hail storms, freezing rain or even by flying debris during wind gust of over 40 MPH.
Solar cells have an efficiency degradation of over 1.3% annually and to maintain the same level of power output over time, owners have to add additional solar panels to their system.
Without routine cleaning, solar panels degrade very quickly because debris along with slightly acidic rain on the surface slowly corrodes the glue/rubber seals adhering the glass to the frame. Then moisture seeps into the solar panel and causes panel failure.
Single Fault System Failures
Solar cells within the panel are placed in series, if any cell stop working, the whole solar panel substantially decreases power output. Similarly, solar panels are placed in series and if one solar panel goes down, then the entire system will substantially decrease power output. In most cases a drop in voltage cause by any such failure will cause the power inverter to fail.
Low Quality Control
Lower solar panel prices directly indicate a lower quality product.
The average life expectancy of a current solar panels is under 12 years.
6 Things You Didn’t Know About Other Wind Turbines
Turbine propellers are normally held in place by a very large main ball bearing which cause substantial resistance to the rotation of the turbine rendering it very inefficient.
The main ball bearing needs replacement every 3 years, which requires the expense of a crane to take the propeller off of the turbine to replace the ball bearing.
If the main bearing is not properly lubricated it will melt. If that happens the propeller blades will be projected off the turbine and on to the ground which can be very dangerous.
Many Moving Parts
Normally the turbine has a dozen moving parts that need routine replacement, including gear box, high speed and low speed shaft, yaw drive, yaw motor, pitch angle, the rotor, and brake.
Permit requirements, complicated installation coupled with frequent maintenance causes this to be a highly impractical proposition.
Very high audible emissions which are greater than 40 dB(A) in many cases even at far distances from the turbine.