Homepage / Table of Contents / Contact / Where to Buy

HPV-22 Charge Controller

The HPV-22 is No Longer Available

It has been replaced by the HPV-22B

The HPV-22 charge controller will deliver more charging amperage to your batteries (like the Solar Boost type controllers) and adds in the proven, all important Tapering charge strategy. This will actually get you to full charge faster and friendlier than the "ON/OFF" controllers do.

By pulling the included 25' temperature sensor cable from the controller to the battery , you can also utilize Battery Temperature Compensation which will adjust the finish charge set point up or down depending on your batteries temperature. This prevents plate sulfation when your batteries are cold. When they are hot, it prevents unnecessary "boiling" of the electrolyte which drives water out of your batteries. Others make this important feature an "option" and charge you extra for their temperature compensation sensors. Ours comes standard with the controller and is included in our price!

The HPV-22 has the following standard features:

  • 22 Amp Charging Capabilities
    (Regulates up to 400 watts of solar input)
  • Current Limit On Output
    (Eliminates nuisance fuse blowing)
  • Selectable Charge Set Point
    (via a potentiometer on the circit board)
  • Tapering Charge
    (Tapers off the charging amperage after reaching the set point for a full, gentle finish charge)
  • Battery Temperature Compensation
    (Automatically adjusts charge set point with respect to battery temperature to help prevent excess water loss in warmer temperatures and/or plate sulfation build-up in cooler temperatrures)
  • Liquid Crystal Display
    (Gives Digital readout of battery voltage, array input amperage, and boosted charging amperage)
  • Light Emitting Diodes
    (Gives "at-a-glance" system status: "Charging", "Charged", and "MPPT" active)
Operation of the HPV-22
As the sun rises and the solar panels reach a voltage that is slightly higher than the battery voltage, the HPV-22 will deliver all available charging amperage to the batteries and the “Charging” LED will be solidly illuminated. While it is doing this, it will be referencing the Maximum Power Point of the Solar panels and the "MPPT Active When Lit" LED will be illuminated.

After the HPV-22 locks on to the Maximum Power Point of the Solar panels, it will enter its Current Boosting mode. The actual percentage of the boost will be affected by the Solar panel temperature and the Battery voltage. The greatest percentage of boost will be given when the panels are cool and the battery voltage is low.

The HPV-22 will monitor and track the Maximum Power Point of the Solar panels by testing for it several times a minute.The battery voltage will rise under this influence until it approaches the controllers voltage set point at which time it will enter into its "Taper" charge mode.

During this mode, the "Charged" LED will be pulsing on and off slowly and the "MPPT Active" LED will be off. While the battery voltage set point is held constant, the charging amperage will slowly taper down until it only delivers what is necessary to hold the battery at the set point.

As the sunlight fades and evening approaches, the battery voltage will begin to fall from the set point to a lower point that is closer to its “at rest” voltage.

This cycle will be repeated the following morning.

Homepage / Table of Contents / Contact / Where to Buy