Harsha sent me an urgent email this morning. He said, "It might be true that sun can give 5 units/m2/day. But because the efficiency of solar panels is only 15% and there are losses in the system, we only produce 0.30 to 0.6 units/m2/day. Â For example a battery based system will give you 3 units [...]
The answer to this question depends on where you live and how much space you have. We know that 1 unit of electricity is 1 kWh. Let us assume that you need 600 units a month. This is 20 kWh per day.  Check your actual average usage using your electricity bill. The average solar in-sol-ation in [...]
71% of the earth is covered by water of which 6% is ice. Therefore absorption of solar energy and evapo-transpiration of water at the earth's surface are dominated by the oceans. These drive the earth's climate system. Heat is transferred frim the equator towards the poles by the atmosphere and the ocean. The atmosphere does [...]
We need Deep Cycle Batteries for Solar Panels. Deep cycle batteries can withstand a deep discharge. Your car starter battery may survive a 100 deep discharges, but a high spec Deep Cycle Battery can withstand about 1200 deep discharges. Solar Panels generate low currents and charge batteries slowly. 'Solar' batteries are optimised for high battery efficiency. [...]
If you follow this link: http://www.amco.co.in/products.php?id=9 , you can see how a battery's weight increases with it's Ah rating. You need bigger batteries to store more electric charge. The capacity of a battery is related to the quantity of active materials and electrolytes in it as well as the surface area of the plates. Electric current is the flow [...]
If you go to their online store, you can see the Ah or Storage Capacity of a range of Exide Lead Acid Inverter batteries. With a terminal voltage of 12V,  you get Ah ratings of 180.00, 165.00, 150.00,  130.00, 100.00,  88.00, 80.00 and  65.00. To know which battery to pick, you must know your load current [...]
Any standalone off-grid solar system needs a Rechargeable Battery. Nearly everyone I can think of, is used to the idea of emergency lights and cell phones. In fact, battery life and charging time are two points of great interest in cell phones. Whether the source of power is the electricity grid or sunlight, we use [...]
What happens to our old cellphones and laptops, used batteries and discarded lights and other appliances? Sometimes we trade in the old for new. Many retailers take our old eWaste and often just channel it into the informal sector, whereby it finally ends up in landfills. From here, the poisonous chemicals like mercury, cadmium etc seep [...]
Trends: Industry predictions are that human society will move away from incandescent light bulbs to LED lamps in about a decade or two. People like smaller electricity bills. Environmentalists want less energy wastage as heat. Haitz's Law states that "every decade, the cost per lumen (unit of useful light emitted) falls by a factor of 10, and the [...]
The first step that the Energy Conscious people have to take, is to assess the effectiveness of energy saving devices and materials. What is embodied Energy? Wikipedia says: "Embodied Energy is the sum of all the energy required to produce any goods or services, considered as if that energy was incorporated or 'embodied' in the product itself." [...]
