Standalone Power : Essential System™ : User Manual
Copyright © 2014 Off-Grid Energy Australia Pty Ltd
16
Solar Photovoltaic Array
The solar array is the primary source of energy for this stand-alone power system.
Solar panels convert sunlight (not heat) into DC electricity. Many variables affect their
output production, including temperature, irradiance levels and sunlight hours. The
amount of energy generated from the solar panels varies seasonally as well as day-to-
day depending on weather variation.
Solar panels almost never produce their rated peak power output, as this is simply a measurement in test-
conditions. As an example, 3kW of solar might produce anywhere from 0W (night) – 2.8kW (on a cool, clear
day with sun adjacent to the solar panels). There are many factors at work when solar converts light to
electricity!
Also be aware the Charge controller will cut power production back at times to ensure the battery bank is
not being charged too quickly or is not being overcharged.
WARNING
o
Do not touch or forcibly pull any electrical wiring connected to the solar array.
o
Do not touch or come in contact with a solar module if it is found to be broken or has cracked glass –
risk of electrical shock
o
Be very careful when cleaning panels at heights (OEA recommends using heights trained personnel)
Solar Array DC-Isolator
The solar DC-Isolator is usually located next to the solar array on the roof or on an adjacent
wall near the array.
This device can be used to stop the flow of DC-Voltage electricity from the solar array to
the solar MPPT/charger if necessary for electrical maintenance purposes.
CAUTION: More than one DC- Isolator may be installed, make sure all are switched off
as required.
Use
Convert sunlight into DC Voltage electricity
Solar Input
Converts solar irradiance/light into DC voltage electricity
Solar Output
DC voltage electricity to solar MPPT Inverter or Charge controller