I have purchased pure sine-wave su-kam inverter and su-kam smf batteries in chennai 8 months back from novo traders who is the distributor of su-kam products in chennai. Novo traders, says that the back-up time will be around 2 hours in full load. I got a same back-up time as they says and i was satisfied. But 2 months back, i got a problem with the back-up time. Whenever current goes off i got only 15 minutes back-up. I called novo, within one hour they sent their engineer and he checked and noticed that the battery is the only problem.
Then the engr brought a standby battery and taken the sukam battery for replacement. After one month i called novo, they said, sir we are not getting the new battery for u and we also follow reqularly and they said even if u get the su-kam battery, u will face a problem again, because we are facing lot with su-kam battery.instead of su-kam battery we give other make battery at the same price with 2 years warranty, you need not pay anything for it. I accepted and they changed other good brand (sf sonic from exide) new battery. Now i am satisfied.
Yesterday i called novo traders and ask, what about my su-kam battery, they said still battery is not coming, we are strugling with the smf battery. My advise, dont put su-kam smf battery for your inverters and also if you want to buy a inverter or any consumable products select a good dealers like novo.