WARNINGBuying Batteries ? Please don’t get Cheated
PLEASE PLEASE PLEASE share this so that others may know:
The capacity of a battery is described in Ah which stands for 'Ampere Hour'. We see inscriptions like 100Ah, 150Ah and so on written on batteries. Of late we see figures like xx100 or 150xx [xx varies from company to company] written on the battery and we take it for granted that it is 100 Ah or 150 Ah , while it may have no relation to the actual Ah. For example a 150xx may actually be 100Ah or 120Ah in reality. Why is this done ? Competition is market driven and customers naturally want the best deal. There is a substantial difference between the prices of a 100 Ah and a 150Ah battery in production. So when the competition is stiff companies go through naming conventions that play a psychological game on the customer. We think for example that we got an excellent price for a 150Ah battery because we know that we are paying the market equivalent price of say a 120 Ah battery ; while in fact the battery may be actually 100 Ah. In reality the battery company has sold us a 100 Ah battery for the price of a 120Ah battery.
SO BEFORE YOU BUY BATTERIES TALK TO THE SELLER OR CHECK ONLINE FOR DETAILS ON THE ACTUAL AH OF THE BATTERY. USING THE WRONG AH BATTERY CAN DAMAGE YOUR INVERTER
Additional Note:
Calculation technique: 100 Ah x 12 Volt = 1200 Watts Stored power | A 50 Watt will run for approximately 1200/50 = 24 hours. | A 600 Watt device will run for approximately 1200/600 = 2 hours.
This will give you an approximate indication of the actual capacity of your battery once you connect the corresponding load. Leave a 10%~20% allowance because there are some conversion losses involved when the inverter/ups converts batteries DC voltage into mains AC voltage.
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