Batteries

 What are solar batteries?

A solar battery is one that receives its energy from the sun or from some other light source through the use of photovoltaics. In most cases, a solar-powered battery is implanted in an electronic device and not capable of being removed. A solar powered battery is usually capable of fully charging after just an hour or two of exposure to sunlight.

The surest evidence of a solar battery is an array of solar cells, usually in a line or perhaps in a block, somewhere on the device. These cells collect the light and cause electrons in semimgnductors to begin to move along that semimgnductor and to metal contacts. Once at these metal contacts, the energy generated can then be stored in a solar cell, or it may be put to direct use.If that energy is stored, the solar powered battery will discharge it at the appropriate time. For example, that time may be when it is turned on by a person, or it may come on automatically, as with some lighting applications. The power is then drawn from the solar battery much like it would be any other battery.

 AGM Battery

AGM has very low internal resistance, is capable to deliver high currents on demand and offers a relatively long service life, even when deep-cycled. AGM is maintenance free, provides good electrical reliability and is lighter than the flooded lead acid type. It stands up well to low temperatures and has a low self-discharge.

 Advantages

  • Spill-proof through acid encapsulation in matting technology
  • High specific power, low internal resistance, responsive to load
  • Up to 5 times faster charge than with flooded technology
  • Better cycle life than with flooded systems
  • Water retention (oxygen and hydrogen combine to produce water)
  • Vibration resistance due to sandwich construction
  • Stands up well to cold temperature

 GEL Battery

A modern Gel Battery (also known as a "Gel Cell") is a VRLA battery with a gelified electrolyte; the sulfuric acid is mixed with fumed silica, which makes the resulting mass gel-like and immobile. Unlike a flooded wet-cell lead-acid battery, these batteries do not need to be kept upright.

 Advantages

  • Totally maintenance free
  • Superior deep cycle life when compared to AGM
  • Minimal corrosion thus physically compatible with sensitive electronic equipment
  • Very low to no gassing (unless overcharged)
  • Superior shelf life when compared to Wet Cell
  • Rugged and vibration-resistant
  • Lowest cost-per-cycle (cost / life cycles)

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