There are many factors  that affect battery life, but the rule of thumb is after 3 years they have lost most of their ability to store charge.<div><br></div><div>And no, car batteries can not be used. The type of batteries used in UPS and for solar power is the type know as &#39;deep cycle&#39; which can handle the frequent charging and discharging. |Normal car batteries are not designed for that.<br>

<br></div><div>One of the leading manufactures of deep cycle batteries is a Korean company known as Gaston,. So whenever you are looking for solar or inverter batteries, always check for their batteries. They have batteries ranging from a few AH to over 200 AH and abovr. Most telcoms use them as backup system for the BTS equipment,.</div>