Showing posts from October, 2015

Solar Charge Controller

Solar charge controller is a device which regulates voltage and/or current to protect batteries from overcharging in the solar photovoltaic system. It has been observed that most solar panels of 12 volts have output voltage of 16 to 20 volts approximately. So, if there is no regulation the batteries will be damaged due to overcharging. In order to get fully charged, most batteries require around 14 to 14.5 volts. A solar charge controller regulates the rate of adding and subtracting of electric current from batteries. It helps to prevent batteries from overcharging and deep discharging. It is also protective against over voltage. This feature of solar charge controller contributes to enhance the lifespan of batteries significantly.

Types of Solar Charge Controller

Various shapes, sizes, features, and price ranges of solar charge controllers are available in the market. They are within the range of 4 amps to up to the 60 to 80 amp MPPT programmable controllers having computer interface.…

How to size battery for solar panel

While designing a solar photovoltaic off-grid system, you need to determine required batteries. A little math is necessary to size batteries. An off-grid battery bank should be designed in such a way thatthe systemis not only sufficient enough to supply necessary power during cloudy daysbut also small enough to be charged by your solar panels. First of all, you need to decide how much storage you want to provide by your battery bank. It is familiar as “days of autonomy" which is based on your expected number of days power provided by the system without receiving an input charge from the solar array. Beside determining days of autonomy, you also need to consider the critical situation and usage pattern of your application. If you decide to install a system for a weekend home, you need to consider a larger battery bank for charging and storing energy all week. But, if you want to add a photovoltaic array to a generator-based system as supplement, then you need to undersized you…

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