Off Grid Energy Systems

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Solar power has come a long way in a short time, with thousands of new installations happening daily! If you are on the market for solar power for your home or business, there are a few options available. If you are planning to install your own solar energy system, then first check with your council, for what you can and not do. The two main types of solar power systems are grid connect and off grid (stand alone/remote power).

With a business or residential grid connect system, your house or property is still connected to the mains power supply, so battery storage is not required. A grid connect installation ensures you have the electricity you need, whenever you need it - automatically and regardless of conditions. An off grid solar power system is completely separated from mains power and utilises a deep cycle battery bank for storing electricity generated by solar panels. Off grid installations are most common in rural and outback areas of Australia where the mains grid simply isn't available, or prohibitively expensive to connect to - Other applications for solar energy include hot water systems and solar powered pumping...

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Basic Components Of An Off Grid Energy System

An off grid energy system is comprised of solar panels, deep cycle batteries, a charger controller and an inverter. Some of the larger systems may contain breaker boxes and main switches that can turn off power from the solar panels and batteries at the same time. The charging system in an off grid system is very important. The deep cycle batteries in the system cannot be overly charged or excessively discharged with long periods of not being charged. The solar charger in the system, insures that these conditions don't arrise - Because if they were to do, then the batteries won't last long!

50 Amp MPPT Charger Controller - These chargers can be connected in parallel for increased charging power....

The batteries in an off grid system is similar to car batteries in that they both contain sulphuric acid, however, the differences of the two batteries are the plates contained inside. Deep cycle batteries contain much thicker plates than car batteries and they were designed for continuous charge/discharge cycles. Car batteries run under the same conditions as deep cycle batteries, will not last very long - So avoid car batteries at all costs when designing your system.

This is a bank of deep cycle batteries - The batteries in the bank are rated at 2 volts each. 6 are connected in series to achieve the 12 volts...

The next important component of an off grid energy system, is the inverter. The inverter does the job of converting the DC voltage from the batteries, into AC higher voltages. There are a few types of inverters available and they are square wave, modified sine wave and pure sine wave inverters. Pure sine wave inverters are used where delicate electronic appliances are going to be powered. The AC current from a pure sine wave inverter matches the power from the grid exactly. So in most cases, it is highly recommended to choose a pure sine wave inverter over the other types.

This is a pure sine wave inverter that commonly used for backup supplies. It has a charge current of 70 amps and the inverter produces a continuous 6000 watts and at 18000 watts peak....

The solar panels in an off grid system, does the job of keeping the batteries charged. How much solar power that is required for the system, will depend on how much energy is used from the batteries and how much sun light the panels will recieve. A well balanced energy system is one that has all the available power needed and has enough solar power available to replace the energy used. There are four types of solar panels, but one type is only available to NASA and the military. The best type available to consumers are the Monocrystalline types. The Mono crystalline solar panels are a little more expensive, but they are worth the expenditure! Check out this page: How to setup a basic energy system

When shopping around for components for an off grid energy system, start with the charger and then the batteries and the other components last. Because when designing a system, you want the system to be scalable (upgradable). A large charger would mean you won't have to change it when the system starts to produce more energy. An ideal system, should only have solar panels added for the upgrades, but this could also include adding more batteries. With the largest charger and the largest inverter in the system, during upgrades, ideally those components will not need to be changed. Check out this page: Choosing the right energy system