DogDipstick said:
motomech said:
Multistar
Turnigy
To do this without a "rat's nest" of wires,
some Zippy
BTW, top charge on a 14S LiPoly pack is 59.3 Volts, so the charger you have now would be too low when you need the extra bit of range.
Never Ever
charge a lipo 14s past 58.8v... period. Dont go over 4.2v it is pointless.
Zippy and Multistart are the worst.
Just get a cheap configurable bluetoof BMS.
Never Ever
charge a lipo 14s past 58.8v... period. Dont go over 4.2v it is pointless.
On paper, 58.8V is 4.20/cell, but even going to 59.3, as soon as the a (bulk) charger is disconnected, the cells will fall below 4.20V.
Besides, if you read my post rather than jumping up and yelling "fire" you will see I did not recommend charging to 59.3V.
I stated: "BTW, top charge on a 14S LiPoly pack is 59.3 Volts, so the charger you have now would be too low when you need the extra bit of range."
The key words being "...bit of range".
Some folks, perhaps suffering range anxiety for a longer trip might want as much capacity as possible
The general thought being going from 4.1V up to 4.2V reduces service life (cycles), so why not point that out?
I have pointed out in many past posts that due to it's smaller form factor, it's not difficult to carry more capacity of LiPoly than other chemistries and the best way to extend it's service life, would be to not use it to it's full capacity. Strict adherence to the 80% depth of discharge rule, or better yet, limiting top charge values to some something more like a 70% discharge range would be the way to go.
Zippy and Multistart are the worst.
Multistar has NOT even been available for over a year, so why bother to pass judgement on it?
But for the record, Multistar, for those w/ low C-rate requirements, the regular discounts Hobbyking offered made it an out-standing value performer. and the BIG bricks were a Godsend to ebikes. Many here miss the Multistar.
Perhaps you might want to review the very sound work of of icecube57, who conducted discharge tests on many brands and pointed out that Multristar would be a good choice for those who could accept it's low C-rate limitations.
Most here, with brand experience would rate the standard Turnigy over Zippy, but the difference is not great and the Zippy Compacts have shown to be a good value. the equivalant Zippy on sale (a rare occurrence these days), could be a good alternative to Turnigy
It is very much a matter of opinion and throwing out a "carved in stone" proclamation without offering any evidence doesn't really doesn't help anyone make a choice.
Just get a cheap configurable bluetoof BMS.
There is little evidence that a "cheap" BMS will function very long w/out failing on a high-powered LiPoly (RC type) system. Perhaps I missed some examples, so maybe you could point out some?
