Stand Alone Solar Power System Design

When designing an off grid power system, it is crucial that we determine the size and type of loads that require powering and when they require power. Variation in load demands need to be evaluated, including seasonal differences, day vs night loads, heat and cooling systems and in many off grid homes, water pumping requirements.

Off Grid Solar Power Systems are generally designed for  worse case condition, ie, Winter Periods where solar radiation drops to more than half of average summer output. Batteries play an important roll in providing power autonomy, and can be scaled up to eliminate the need for a backup generator. Generally, we design systems for 2 – 4 days of autonomy.

Solar Panel Upgrade with Enphase Battery System in Langwarrin, Victoria
Solar Hybrid System in McIntyre, Victoria
Solar Hybrid System in McIntyre, Victoria

An average sized off grid power system capable of supply loads to a modern home, will consist of 5-10kWp of solar PV panels, between 15 – 40kWh of available battery energy, and an inverter charger which can discharge between 10 – 20kWp of power.

Smaller off grid power systems can be designed for Mobile Homes, Yachts, Sheds and Villages Dwellings for as little as a few thousand dollars. Please enquire for further details.

Home Efficiency and Design Principals in relation to an Off Grid Power System

Home Design and Appliance Efficiency play a critical roll in determining the size and characteristics of the stand alone power system. Generally, the heating and cooling of a home will determine the cost and size of an off grid power system, so it is imperative that careful consideration be given to home climate control. The Green Power Company recommend the use of evaporative cooling systems in summer (for non-humid conditions) and heat pump/ fire boosted underfloor hydronic heating systems for winter.

Solar Hydronic Heating System in Mornington Victoria
Solar Hydronic Heating System in Mornington Victoria