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Topic-icon Batteries to use for a 72V system

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3 years 7 months ago - 3 years 7 months ago #29531927 by gg
I have a setup similar to an electric motorcycle, and I need to increase the top RPMs from 500 to 800 or so. I am currently using a 48V system and a 60V controller (HBL1660). Can I go with HBL1672 and GBL1872 (my next setup has to be bigger) to set up a 72V system?
If so, what batteries can I use? HBL1672 and GBL1872 have been tested with what batteries? If I get 6 12V AGM batteries, each one of those is 14.4V when charged, so I will have 86.4V. If I go with two 36V lifepo4 batteries, I will also have 80+V when fully charged. How are 72V systems implemented with HBL1672 and GBL1872 in real life? Thank you.

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3 years 7 months ago #29531928 by blake
Any batteries will work as long as the combined voltage do not exceed the max voltage listed on the controllers datasheet (75V for HBL1672, 80V for GBL1872). Six of the 12V AGM batteries would be too much for either controller. If you can, I would recommend using five to yield 72V at full charge. Two 36V lifepo4 batteries would only yeild about 76.8V at full charge, which would be fine for either controller.

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