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40A Charge controllers



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Morningstar Charge Controller ProStar PS-MPPT-40M 40A MPPT

  • Battery compatibilityLithium-ion, Lead acid
  • Controller typeMPPT Charge Controllers
  • Maximum charging current40 A
  • Maximum voltage of the solar panels120 V

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40 amp charge controllers

Operating a solar panel system with a battery bank without a charge controller is simply unsafe. A good model can significantly increase the battery's lifespan while also enhancing the overall security of your system. For smaller PV systems, such as those used in portable, RV, boat, or similar applications, we advise using 40 amp solar charge controllers.

The capabilities of a 40 amp charge controller

As its name implies, this critical component regulates the charging process. The following features are typical of a 40 amp solar charge controller:

  • Protecting the battery from overcharging by regulating the voltage from the solar array
  • Preventing overcharging and deep discharge
  • Protecting from reverse current. Fires can start if electricity flows uncontrollably from batteries to panels at night
  • Checking the health of the battery bank. A charge controller can be used to monitor the battery's health and connected loads

Reasons to use a 40 amp charge controller

A large solar panel setup will overload a 40 amp charge controller. You should go with it if your project is medium to small – about a few 200 W solar panels. There is a more exact way to figure out if a 40 amp charge controller is what you need. In order to do that, you will need to divide the wattage of your panels by the voltage of your battery bank.

In order to charge a 12 V battery from four 100 W solar panels, for instance, you'll need a charge controller with a capacity of 33.33 A (400 / 12 = 33.33). Here, a charge controller capable of handling 40 amps would be more than adequate.

Picking the best 40 amp charge controller

Whether to go with pulse-width modulation (PWM) or maximum power point tracking (MPPT) is one of the most important decisions to be made when selecting a charge controller.

It would be less expensive to use a 40 amp PWM solar charge controller. In addition, because they are less complex, these controllers have a longer lifespan. A PWM charge controller should last between ten and twenty years. The longevity and low cost, however, come at the expense of efficiency. Using a 40 amp PWM solar charge controller would limit your ability to customize the charging process and give you only 75–80% efficiency. Additionally, when the voltages of the panels and batteries are mismatched, this type of controller loses too much energy.

If it uses MPPT technology, a 40 amp solar charge controller costs more. In return, you have greater control over the charging process and an increased efficiency of up to 99%. It depends on the manufacturer, but these controllers typically last between 10 and 15 years.

Why choose us?

Our store has a number of models to choose from if you're looking for a 40 amp solar charge controller for sale.  If you have any inquiries, please don't hesitate to get in touch with us. Some benefits of doing business with us include:

  • Fulfillment centers both on the East and the West coasts of the USA
  • Orders are processed in 24 hours and shipped in 48 hours
  • Competitive 40 amp solar charge controller prices
  • Delivery in 5-7 business days
  • Only reliable manufacturers
  • 100% genuine products

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