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What Wattage is too expensive?
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<blockquote data-quote="mat3833" data-source="post: 8824028" data-attributes="member: 587645"><p>That's the issue we all have. Companies like XS power are rating their packs at voltages much higher than recommended by spec sheets for known cells. 2.7v is the max cell charge on almost every spec sheet I've seen. Some say 2.8v for brief periods, and others say 2.5v. based on that you have the following ranges for max charging voltage:</p><p>5s - 12.5-14v</p><p>6s - 15-16.8v</p><p>7s - 17.5-19.6v</p><p></p><p>These are max charge voltages I have seen. I don't like running anything at max of anything. 2.7v per cell is the majority of LTO spec sheet max cell voltage recommendations. I went with a 6s bank so I could run a factory alt charging at 14.1-14.3. </p><p></p><p>A 5s bank should never see 14.8v let alone over 14v. A 6s bank should not see over 16.8v</p><p></p><p>LTO cells are happy between 2.1-2.5v low voltage Cutoff is 1.9v. Staying in the 2.1-2.5 range is going to give you best results. </p><p></p><p>Matt</p></blockquote><p></p>
[QUOTE="mat3833, post: 8824028, member: 587645"] That's the issue we all have. Companies like XS power are rating their packs at voltages much higher than recommended by spec sheets for known cells. 2.7v is the max cell charge on almost every spec sheet I've seen. Some say 2.8v for brief periods, and others say 2.5v. based on that you have the following ranges for max charging voltage: 5s - 12.5-14v 6s - 15-16.8v 7s - 17.5-19.6v These are max charge voltages I have seen. I don't like running anything at max of anything. 2.7v per cell is the majority of LTO spec sheet max cell voltage recommendations. I went with a 6s bank so I could run a factory alt charging at 14.1-14.3. A 5s bank should never see 14.8v let alone over 14v. A 6s bank should not see over 16.8v LTO cells are happy between 2.1-2.5v low voltage Cutoff is 1.9v. Staying in the 2.1-2.5 range is going to give you best results. Matt [/QUOTE]
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