Solar MPPT Hybrid Charge Controller

  A solar charge controller is fundamentally a voltage or current controller to charge the battery and keep electric cells from overcharging. It directs the voltage and current hailing from the solar panels setting off to the electric cell. 

  Generally, 12V boards/panels put out in the ballpark of 16 to 20V, so if there is no regulation the electric cells will damaged from overcharging. Generally, electric storage devices require around 14 to 14.5V to get completely charged. The solar charge controllers are available in all features, costs and sizes. The range of charge controllers are from 4.5A and up to 60 to 80A.

   There are many ways to implement MPPT, but no matter which method is used, the change in component power must first be measured and then reacted to the change. The most critical component is the current sensor. Its measurement accuracy and linearity error will directly determine the hardware efficiency. Manufacturers with better current sensors include LEM in Switzerland, VAC in the United States, Tamura in Japan, etc. There are open-loop and There are two types of closed-loop. The open-loop current sensor is generally a voltage type, with small volume, light weight, no insertion loss, low cost, 99% linear accuracy, and a total measurement error of about 1%. The closed-loop current sensor has a wide frequency range and high accuracy. , fast response time, strong anti-interference ability, linear accuracy 99.9%, total measurement error 0.4%.

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