How to calculate battery backup

Battery Back-up calculation before select Solar panel for off Grid System
 how to calculate battery backup


We can calculate as below formula for 150Ah  battery–
= Battery volt * Battery AH / Usage in watts

We are taking  some load as below equipment to calculate the battery load—

1Led TV= 70 watt,
2Fan      = 120watt &
1Led Bulb= 10 wt
Total load-  200 watt.

Now we can get the total running hrs as above load.

=  12 * 150Ah/200 watt = 9 Hrs run your appliance


Total 9 Hrs will run your appliance with 150 Ah battery & 200 watt load.

If battery increase 150Ah to 200 Ah & also load increase as below–

= Battery volt * Battery AH / Usage in watts

2Led TV      = 140 watt,
5Fan            = 300watt &
 6Led Bulb = 60 wt

Total load-  500 watt.

Now we can get the total running hrs as above load.


=  12 * 200Ah/500 watt = 4.8 Hrs run your appliance

Total 4.8Hrs will run your appliance with 200 Ah battery & 500 watt load.

For More details you can see Video–  
Click On–>    https://youtu.be/nweYOcVsWYM

How solar power do are  you need 
So you want to set your rig up the solar but you are not sure what the size of setup you need?this is blog is designed to give you the tool needed to able to work out exactly what are you drawing from your rig’ s batteries and what are type of solar set up you need. 


How to work out watts
The large solar panel will collect more and more energy less time, but just how big does the solar panel need be? 
A power consumption of appliance is usually gives in watts. The calculate energy you will use over the time, just multiply power consumption by the hour of the use . For the example:
10 what device use over 3 hour equal 10×3= 30 watt.

How to  we convert Amps to watts
A energy in watts is equals to the electric charge in a Amps time the voltage in the volts 
Watts= Amps × volts 
The find electric charge in Amps when the energy consumption is the 300 watt and voltage is the 240 vollts.
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300 watts/ 240 volts = 1.25 Amps.
The solar panel are commonly used to charge a battery-not to charge a device directly. There are a couples of reasons for the having batteries . This solar panels ais should not be generate sufficient  watts to the directly power a appliance, and can build up a higher wattage via an battery. Secondly the battery can regulate this Power goins in the appliance at constant rates. 
Battery  capacity is a  measured in Amps hours( eg.120 Ah) you are need to a convert this to watt hours by the multiplying the ah figure by the battery voltages ( eg. 12 v) see the calculations above
Ah refers to Amps hours. Rating are usually found on deep cycle battery . If in a battery is rated at a 100 AMps hours it is should delived 5 Amps of a power for a 20 hour or 20 amps of a power for a 5 hours.

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The when closing a battery, keep in mind a equipment you will be a powering and a time in which they will be running.theoretically an100 Ah battery can be deliver 5 Amps over is a 20 Hours period ( and so on) taking into account  a average small campsite- with a small 45 w fridge a running  for a 6 hours ,3 hour of 15w lighting a and 20w of others electronic equipment the minimum consumption  to a expected is a 335 w. The Take is this wattage and divide a it by the voltage, 12 v, give 28ah. The smarter battery is  setup would  to use an iTech 120 lithium battery. With the aim of a leaving 50%  in  a battery bring the requirements is to 56 ah per day.AGM batteries usually weigh 35 kg but and the TECH120 battery weighs just 13 kg. You all can also use more of the battery capacity in a iTECH 120-80% which are the mean it’s usable  amp hours waiting is a similar a 200 Amp hours AGM. 


Thanks for reading…..

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