thegodfatherdany wroteTech Guru wrote
Mission Accomplished , 36000 LBP two batteries , and I replaced them my self ; better than paying 140 usd for a good 1200 VA UPS as this UPS
Hi there. Do you have information regarding choosing the correct battery? I asked around and was told all are 12V batteries but some are 7Ah and some 9Ah.
My question is if i have a 1200VA (2battery) or 1500VA (2battery of course) broken UPS, do i get the same batteries for both UPSs?
Also where did you get your batteries from? Macrocity has the PCE12V 7Ah battery for 16.7$ and PCE9Ah for 26.6$ including VAT.
As long as the voltage rating is the same, and the current rating is the same (you either hook all 7 Ah or all 9Ah batteries, don't ever mix them when placed in series), it's ok to use either batteries. But there will be compromises and trade-offs in specific cases:
- when using a set of 12VDC 7Ah batteries to replace 12VDC 9Ah, you lose 2Ah: your UPS loses the capacity to provide appropriate current within 1 hour (2A to be specific). This move is not recommended mostly since your setup will mostly be needing that 9A/hr.
- when using a set of 12VDC 9Ah batteries to replace 12VDC 7Ah, you gain 2Ah but charging time for the batteries increases by at least 30min. This is an ok tradeoff for most UPSes, but some don't allow you to change the nominal voltage and current ratings for the batteries and will sound off an alarm for that. so best consult a user manual for that before buying and installing them.