DC stands for Direct Current. This video discusses the DC part of the Power Station. Your car battery is DC while inside your house you have AC or Alternating Current. The Power Station is where all the components of the Electrical Power Generation are combined so that they all work in unison.
The heart of the whole system works on batteries: Twenty-four 6-Volt, lead acid, deep cycle batteries. They are much taller than regular car batteries, approximately three times taller and they are approximately three times heavier due to the lead plates that are inside them. Their water capacity is also larger so they don’t need serviced as often. Approximately every 3-4 months, depending on the temperature and how much charge you’re using, they need to be serviced with distilled water. Charge usage matters because as you charge the battery a Hydrogen gas byproduct is formed from the Lead Acid. The batteries are wired up in series parallel. This way it provides 48 Volts. The Wind Generators outside and the Solar Panels have the sole purpose of charging these batteries and maintaining the charge. The more battery charge means the less work is necessary from the Solar Panels or the Wind Generators. At night time, when there is no wind or sun, the power generation comes from the residual power in the batteries.
The Charger and back up Charger monitor the batteries Voltage, temperature, and Amps and decide if they need charged. There are three charge cycles of a battery: Bolt Charge, Absorb Cycle, and Float Cycle. The Charger also controls the release of Hydrogen gas, which forms from the batteries, and allows it to be released through a vent to the outside.