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A charge controller, or charge controller is fundamentally a voltage and additionally current controller to keep batteries from cheating. It controls the voltage and current originating from the sun based boards setting off to the battery. Most “12 volt” boards put out around 16 to 20 volts, so if there is no control the batteries will be harmed from cheating. Most batteries need around 14 to 14.5 volts to get completely charged.


Not generally, but rather for the most part. By and large, there is no requirement for an accuse controller of the little support, or stream charge boards, for example, the 1 to 5 watt boards. A harsh decide is that if the board puts out around 2 watts or less for every 50 battery amp-hours, then you needn’t bother with one.

For instance, a standard overwhelmed golf auto battery is around 210 amp-hours. So to keep up an arrangement match of them (12 volts) only for upkeep or capacity, you would need a board that is around 4.2 watts. The prominent 5 watt boards are sufficiently close, and won’t require a controller. On the off chance that you are keeping up AGM profound cycle batteries, for example, the Concorde Sun Xtender then you can utilize a littler 2 to 2 watt board.


Charge controls come in all shapes, sizes, elements, and value ranges. They run from the little 4.5 amp (Sunguard) control, up to the 60 to 80 amp MPPT programmable controllers with PC interface. Frequently, if streams more than 60 amps are required, at least two 40 to 80 amp units are wired in parallel. The most widely recognized controls utilized for all battery based frameworks are in the 4 to 60 amp go, however a portion of the new MPPT controls, for example, the Outback Power FlexMax go up to 80 amps.

Charge controls come in 3 general sorts (with some cover):

Basic 1 or 2 organize controls which depend on transfers or shunt transistors to control the voltage in maybe a couple steps. These basically simply short or detach the sun based board when a specific voltage is come to. For all viable purposes these are dinosaurs, however regardless you see a couple on old frameworks – and a portion of the super shoddy ones available to be purchased on the web. Their exclusive genuine specialty is their unwavering quality – they have so couple of segments, there is very little to break.

3-arrange as well as PWM such Morningstar, Xantrex, Blue Sky, Steca, and numerous others. These are basically the business standard now, however you will infrequently still observe a portion of the more established shunt/transfer sorts around, for example, in the extremely shoddy frameworks offered by discounters and mass advertisers.

Most extreme power point following (MPPT, for example, those made by Midnite Solar, Xantrex, Outback Power, Morningstar and others. These are a definitive in controllers, with costs to coordinate – however with efficiencies in the 94% to 98% territory, they can spare significant cash on bigger frameworks since they give 10 to 30% more energy to the battery. For more data, see our article on MPPT.

Most controllers accompany some sort of pointer, either a straightforward LED, a progression of LED’s, or computerized meters. Numerous more up to date ones, for example, the Outback Power, Midnite Classic, Morningstar MPPT, and others now have worked in PC interfaces for observing and control. The least difficult more often than not have just two or three little LED lights, which demonstrate that you have control and that you are getting some sort of charge. The greater part of those with meters will demonstrate both voltage and the present originating from the boards and the battery voltage. Some additionally demonstrate how much current is being pulled from the LOAD terminals.

The majority of the charge controllers that we stock are 3 arrange PWM sorts, and the MPPT units. (actually, “4-phase” is to some degree promoting buildup – it used to be called adjust, yet somebody chose that 4 phase was superior to 3).

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