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Virtually any solar power system that uses batteries needs a solar charge controller. The solar charge controller functions to control the power as it moves from the solar panels to the batteries. A proper charge controller will prevent the batteries from being overcharged. You can read solar power battery if you need to learn more about solar power batteries.

The simplest type of charge controller functions to monitor the battery voltage and opens the circuit to stop the charging process when the battery is fully recharged. Previously, charge controllers often had mechanical relays to open and close the circuit.

Eventually, pulse width modulation (PWM) became the norm for the charge controlling mechanism. This is a technique by which the amount of power supplied to a battery is reduced gradually as the battery reaches maximum charge. In addition to decreasing the stress on the batteries caused by the charging process, PWM ensures that they’re more fully charged, making them more efficient from the user’s perspective. It’s also possible to use a PWM charge controller to keep batteries “floating,” or in a completely charged state, for as long as you like. PWM also has the extra advantage of not having any breakable mechanical connections.

Maximum power point tracking, or MPPT, is the most recent evolution in solar charge controller technology. MPPT controllers convert excess voltage into amperage. This feature has a couple of major benefits.

The majority of solar power systems make use of 12 volt batteries, not unlike the ones found in cars, but these features work regardless of voltage. Solar panels usually provide much more voltage than the batteries require. Converting the excess voltage into amps reduces the time it takes to charge the battery, while the charge voltage stays at an optimal level. A solar power system with this kind of charge controller will provide power more efficiently.

Power loss is also largely eliminated with MPPT charge controllers. As low-voltage electricity moves along wires, it can experience high levels of loss, dragging down the efficiency of the system. A PWM charge controller used in a system with 12v batteries, for example, would use electricity of around 18v. An MPPT controller will use the highest voltage of any type of charge controller currently available. MPPT controllers experience less power loss because of this improvement.

MPPT charge controllers cost a bit more, but they represent a significant improvement. For this reason, they’re highly recommended. Finally, it’s also possible to prevent reverse-current flow with some modern charge controllers. During the periods when solar panels have stopped generating electricity, such as in overcast conditions, electricity can sometimes begin to flow away from the batteries to the solar panels. This sort of power loss can also make a serious dent in the overall efficiency of a solar power system. At these times, a charge controller will open the circuit, preventing any power from being transferred back to the solar panels.

Rising oil prices and the increasing tolls of pollution are motivating a significant number of people to switch to solar battery chargers. Go to 12 volt solar charger for more in solar interesting info about solar chargers.

Can you build a solar panel for under 0? You can get more information by reading this guide Homemade Energy Review. In this guide, you will get specific instructions on what is best to build based on the size of your house and your location. You will also get step-by-step diagrams on how to build your own solar power system.

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