According to EnergyStar.gov, buying a new ENERGY STAR certified refrigerator to replace your existing model that’s over 10 years old you could save up to $1,100 on energy costs over the appliance’s lifetime! That’s a lot of money, and reason … Continue reading →

A typical refrigerator has a 10- to 20-year lifespan. The longer you have had your refrigerator, the greater the potential repair cost, says The Money Pit. If the refrigerator is less than eight years old, consider repair. If the refrigerator … Continue reading →

More or less all popular TV models are now rated G on EU’s new, stricter energy scale that is designed to encourage TV makers to develop more energy-efficient displays. What does energy rating G mean on a TV? They display … Continue reading →

Any type of energy conversion turns some sort of motion into a type of friction or heat. Nothing is perfect. Electric motors have an efficiency of less than 100% because there is ALWAYS energy loss through any mechanism imaginable. Can … Continue reading →

Lithium-based based batteries cannot be equalized by an overcharge, so alternative methods are required. This paper discusses several cell-balancing methodologies. Active cell balancing methods remove charge from one or more high cells and deliver the charge to one or more … Continue reading →

Example of energy conversion efficiency Conversion process Conversion type Energy efficiency Pumped-storage hydroelectricity gravitational to electrical/reversible 70–85% Engine/motor Combustion engine Chemical to kinetic 10–50% Electric motor Electrical to kinetic 70–99.99% (> 200 W); 50–90% (10–200 W); 30–60% (< 10 W) … Continue reading →

In 2020, the global demand for nickel amounted to some 2.45 million metric tons. It is estimated that nickel demand will increase to 3.18 million metric tons worldwide in 2022, which would represent a 12 percent increase from the estimated … Continue reading →

In the ideal situation, the voltage rise is not a problem: the inverter increases the grid voltage from 240 volts to 242 volts. The problem arises when the customer’s cables between the inverter and the grid are too small for … Continue reading →

How do you create a negative voltage? A common way to generate a negative voltage has been to use an operational amplifier (op amp) to invert the output of a positive precision voltage reference. This approach typically requires a positive … Continue reading →

resistence is higher than batteries in parallel will live long and if the internal resistence is higher then the batteries in series will be live long. Usually, the internal resistence of batteries are very low so connecting in parallel will … Continue reading →

Calculate how many batteries you need by dividing 12 by the voltage of the batteries. For example, use eight 1.5-volt batteries because 12 / 1.5 = 8, or two 6-volt batteries because 12 / 6 = 2. Link together the … Continue reading →

In order to get the burst of power needed to start an engine, a cranking battery needs to deliver a large current for a short amount of time–often 75-400 amps for anywhere between 5 and 15 seconds, depending on the … Continue reading →

EverStart MAXX-35N (North) Car Battery – Consumer Reports. What does the N on a battery mean? An N battery (or N cell) is a standard size of dry-cell battery. An N battery is cylindrical with electrical contacts on each end; … Continue reading →

The BMS can balance the cells by: Wasting energy from the most charged cells by connecting them to a load (such as through passive regulators) Shuffling energy from the most charged cells to the least charged cells (balancers) What is … Continue reading →

A battery management system (BMS) is any electronic system that manages a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area, monitoring its state, calculating secondary data, reporting that data, … Continue reading →