![]() We recommend you use our Off-grid Sizing Calculator and return the results to us. Using the energy wisely when being generated will help minimise the size of the batteries such as using the washing machine when it is sunny with a solar pv system.īy now you can see how much of a balancing act it is designing the best off-grid system. Help reduce overall costs as it can be used for peak loads such as washing machines, reducing your peak consumption and average amp hours and thus lowering the costs of inverter and battery bank. It is recommended you incorporate a generator as a backup for most off-grid systems where a consistant supply is required. Many off-grid systems combine wind generation with solar as theyĬomplement each other during the different seasons. The next stage to consider is the sizing of the solar pv array and / or wind turbine if one would be suitable in your location. Too small a battery bank may not harness the potential of the system as more energy is being produced than can be stored and if not beingĬharged enough on lower yield days (no sun or wind) they will have more frequent deep discharges reducing the lifespan of the batteries. With the renewable source alone and at a higher initial cost. A larger battery bank has a longer discharge and thus longer times between charges but has a greater charging time which may not be achievable In a vented separate location to the plant equipment. The battery bank needs toīe considered carefully charge and discharge times, budget, where they are to be stored as all batteries are heavy and open-valve or flooded lead-acid batteries can emit gases and need to be stored The total amp hours per day (ii) helps to size the battery bank along with other factors such as type of battery, number of renewable sources in the system and climate. Rating should be higher than the total peak power consumption (i) to prevent overload and power outage. Overload function allowing for short surges in load the peak demand of simultaneous automatic startup motors such as fridge and freezer must be accounted for in this total. ![]() Sizing the inverter and/or inverter charger is based on the peak power consumption (i), the total watts of the more demanding appliances being used at any one time. Use our Off-grid Sizing Calculator (requires MS Excel) or follow the instructions on this printable version to add all the appliances and calculate the peak power consumption and average daily amp Such as a TV, Washing Machine or Laptop and all DC appliances such as lighting regardless of whether they are being used simultaneously or not. List each of the appliances you want to use with your off-grid system, the wattage of each appliance and for how long you expect to use them daily or weekly. ![]() The first stage inĭesigning your system is to evaluate your total electricity energy demand. To get the best from an off-grid renewable energy system requires careful consideration of your specific requirements, location, available space for installation and budget. Off-grid Sizing tool (PV array, Wind Turbine, Batteries and Generator)
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