How to choose the battery backup power for your home or office
If you planning to use the off grid power backup then there is a lot of research work waiting for you. There are number of options available in market like power generator system, Outdoor battery backup power units, uninterrupted power supply devices etc. but which one to buy? You must know their features and difference to find out their relevance with respect to your daily power consumption.
To compare the difference between a generator and battery backup power system, you first need to do an audit of power consumed by your different devices like, TV, fridge, washing machine or other electronic devices at home.
How to do the energy audit?
To do an energy audit, you first need to write down your power requirement so that you can decide which capacity power system is required for your home or office. So here are the things you must consider
Average wattage of the appliance (look for label or user manual)
How many hours a particular appliance is being used per day
For example, if your TV label shows 100 Voltage and 50 watts, then your amps requirement would be
Amps = Watt/Voltage (50/100=0.5 amps)
Amps hours = amps * number of hours a device is used
If you or your family is using watching TV for 5 hours then your TV amps hours would be 2.5. In this way you can make a spreadsheet of all of your appliances at home. Calculate the total amps hours and buy the power system accordingly. For example if the total amps hours is 500 amps and the wattage is 10,155W then you must buy a power system with minimum capacity of 10kW so that it can supply power to all your appliances.
You should also know how the battery backup power system works so that you can charge it accordingly. The batteries which consists Lithium Iron Phosphate or Lead acid to store the power needs to be charged by either sunlight during the day or by any other electricity generating source. If the battery backup system is connected with solar panels then the storage must be large to store
all the power generated during the day. If there is surplus power, it can be sold to the grid and get money in return.
For example, you have 500W solar panel which you have charged for 6 hours in a day then your solar panel will produce 3000Wh daily. If your daily consumption is 1000W then you can sell the surplus 2000W to the power grid.
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