OTHER PHOTOVOLTAIC SYSTEM PARTS

1)  Batteries
-Batteries store DC electrical energy in chemical form

-Batteries are rated as Amp-hour (Ah). A common battery specification is the number of hours that are  discharged.

Batteries store DC electrical energy in chemical form.

Batteries are rated as Amp-hour (Ah). A common battery specification is the number of hours that are discharged.

A battery with more than 20 hours discharge is said to have a discharge of
C/20.  More than 5 hours is C/5. Most batteries are rated at the C/20.

TYPES OF PHOTOVOLTAIC SYSTEMS

PV systems can be designed:

    -To provide DC and/or AC power service.

    -Can operate interconnected with or independent of the utility grid.

    -Can be connected with other energy sources and energy storage systems. 

 The two principal classifications  of PV systems are the following:

    1. Grid-conneced or utility-interactive system, and.
    2. Stand-alone system.

1 ) Grid-Connected PV System

Grid-connected or utility-interactive PV systems are designed to operate in parallel with and interconnected with the electric utility grid. The primary component in grid-connected PV systems is the inverter, or power conditioning unit (PCU).

2) Stand-Alone PV System

Stand-alone PV systems are designed to operate independent of the electric utility grid, and they are generally designed and sized to supply certain DC and/or AC electrical loads.

 

3) Hybrid System 

A hybrid renewable energy system is a system in which two or more supplies from different renewable energy sources (e.g., solar-thermal, solar-photovoltaic, wind, biomass, hydropower) are integrated to supply electricity  to the same demand.