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Rectifier of 48volts and maximum output current of 150amps not charging batteries of 24 cells (2volts/600amps-hr) Answered

I recently installed some set of new batteries for a telecom firm with the aim of achieving hybrid on the site in order to reduce diesel consumption and operational cost.
After three days of installation and being charged by a rectifier for maximum performance,i decided to activate hybrid on the site and to my disappointment the back up time only lasted for three hours.
Pls advice me on what to do......thanks

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Discussions

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azumi olu
azumi olu

4 years ago

Thanks to you all for your input.........just need to add that the dc load is 62amps. Considering 80 percent DOD of 600AH,i expect 7hrs of backup time.

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steveastrouk
steveastrouk

4 years ago

that's because you don't charge batteries with 2v, you need 2.2, and when charged you drop it to 2.05/cell, iirc, so that means you need 52.8 volts. Much hinges too on your load. Three hours is entirely feasible, but ifi were you, I'd check your charging volts

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mpilchfamily
mpilchfamily

4 years ago

Let me see if i can put this into better English for you. You recently installed a battery backup system for a company. The batteries are fully charged but they only give you 3 hours of run time. Correct? Your saying you have 24 batteries rated at 2V 600 Ah. What is the total power draw of the system these batteries are supporting?

If you want longer run times you either need to reduce the power usage or add more batteries in parallel to the system. Just be sure that your charging system will support the added batteries.

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rickharris
rickharris

Answer 4 years ago

Yes you have missed out some important information

e.g. What is the load on the battery pack.

Your battery pack contains a finite amount of electricity - You seem to know this so why can't you calculate how long they will last - 600Ah seemed to be quite a lot.