How to understand Battery ratings part 1 @ (AH /WH)

       To establish a successful solar system battery is the key , your whole system will depend upon            this thing.

       Better you understand before you buy it ........

       First we need to learn battery body readings , an example like the picture

      This is a VRLB Lead acid batteries....

 

6GFM100 is the model number of this battery....this is very important , grab and google it, You can find detail about this battery .... http://www.compu-power.co.za/6gfm100-c-power-battery.php.
In every battery you will find readings something similar like this , lets get started

Chart will tell you voltage , Current and power,

Here is something which is you need to understand the best , which is 12V100AH/10HR, this  kind of readings has different meaning, like in 12V100AH/10HR battery is a 12V battery which can provide (12V x 100AH ) =1200 Watt-hour...= 1200WH ,this is the fundamental energy that this battery can store and provide..This battery is compatible with and under 1200WH system ...

but this is not all 12V100AH/10HR, also mean this 12V battery can provide 10A constant current per hour through 10 hours... if your house has electrical devices which total current is below <10A then this battery can give you 10 hour constant service....but this doesn't mean it can only give you max 10A... if you follow the specification chart http://www.compu-power.co.za/6gfm100-c-power-battery.php.of this battery you will see this battery can give max 1000A for 5Sec....but this will cause a a lot of energy loss through internal resistance...

There are other details like cycle use voltage , standby use voltage 

* When a battery is being used as a power source on a regular basis and it is being discharged and subsequently recharged, the battery is said to be in cyclic use , in this case it is 14.40V- 15.00V...

* Standby use batteries are meant to act as an emergency power source where the main power source has failed for some reason. Consequently standby batteries are kept fully charged so that they can kick in immediately. The batteries remain connected to a trickle charger that will keep the battery fully charged and ready for use.

in this case it is 13.50V - 13.80V, this also is called Float Charging Voltage...These batteries can be very long lived if they are charged at a float voltage....

Hope you like this post (jajakallahu khairan)