http://www.batterybackupguide.com/blog/increase-ups-backup-time/ Thu, 17 May 2012 22:36:45 +0000 http://wordpress.org/?v=2.7 hourly 1 http://www.batterybackupguide.com/blog/increase-ups-backup-time/comment-page-1/#comment-1758 eematters Sun, 22 Mar 2009 03:41:57 +0000 http://www.batterybackupguide.com/blog/increase-ups-backup-time/#comment-1758 Only the manufacturer of the UPS can give you a fair answer for your question. If you connect another 12V7.5Ah battery in parallel, the back up time will be doubled but the charging current also will be doubled. With your existing system the battery is charging at 750mA. Ask the supplier of the UPS if the UPS can deliver 1.5A charging current. If he accepts your proposal you can double the back up time. Otherwise leave it as it is. Only the manufacturer of the UPS can give you a fair answer for your question.
If you connect another 12V7.5Ah battery in parallel, the back up time will be doubled but the charging current also will be doubled. With your existing system the battery is charging at 750mA. Ask the supplier of the UPS if the UPS can deliver 1.5A charging current. If he accepts your proposal you can double the back up time. Otherwise leave it as it is.

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