Inverters take DC power and invert it to AC power so it can be fed into the electric utility company grid. The grid tie inverter must synchronize its frequency with that of the grid (e.g. 50 or 60Â Hz) Â and limit the voltage to no higher than the grid voltage. A high-quality modern Grid Tie inverter [...]
Long awaited solar reforms in BESCOM have come! The Government of Karnataka has announced the Solar policy 2014-21, grid  connected solar rooftop system under net-metering basis forms an integral part of the policy. The applications are invited from BESCOM consumers who wish to install grid-connected Solar rooftop PV systems under net-metering scheme. […]
Electricity generated by a Solar Photo Voltaic (PV) system can be directly consumed by the load itself or can be  stored in a battery bank or can be sent out to the grid. A solar PV system in which the electricity generated can be sent to the grid is called an on-grid system. This type of [...]
The image shows India's first (19.04.1975) experimental indigenous satellite, covered in solar panels. A set of solar panels like this is called an array. Each solar panel has several solar modules and each solar module has many solar cells connected in series. If you connect two voltage sources in series, they behave like a single voltage [...]
The difference between ordinary fans and superfans is the motor. Motors work on the principle that like magnetic poles repel. The fan blades are attached to a shaft that is connected to the motor. The motor has two main kinds of magnets. A permanent magnet and an electromagnet. The polarity of the electromagnet is changed [...]
Our voltage sources and our electrical loads are separated by some finite distance. And therein lies a tale! It is necessary to conduct the electric current from the source to the load and back. These conductors are what we typically call wires. They are made of metal. Like copper or aluminium. Actually they could be [...]
Let's take an energy source like a battery or a PV module. When you draw no current from it, the voltage at it's terminals is called it's open-circuit voltage. When you connect any electrical load to it, current flows through it and it's terminal voltage decreases because some power is  wasted by it's internal resistance. [...]
Our batteries are expensive components of our off-grid solar installations. So it is a good idea to protect them from over-charging and deep discharge. To do this we use charge controllers. Charge controllers sense the voltage on the battery. If it is lower than a given threshold then they disconnect the battery from the load. [...]
Take a walk up to any terrace and look at the solar panels. They look like slides, don't they? Why ever is that? You would guess, correctly, that we want our solar panels to receive the greatest amount of sunlight. The sun does not rise in the exact east each day. The direction of sun-rise [...]
Oceans absorb one third to more than half the carbon dioxide that humans put into the atmosphere. Oceans hold 50 times more carbon dioxide than the atmosphere. At the surface of the ocean carbon dioxide and heat are exchanged with the atmosphere. Then the phytoplankton consume this carbon dioxide. Their waste drops to the bottom [...]
