So hubick, how does it work? Can we plug our charge power packs into our dynamo and then never have to worry about finding an outlet again? I'm interested in hearing about your experience. This would make it much easier to go on an endless bike tour in the middle of nowhere.
I connected my SON 28 dyno hub to my Garmin power pack via a Sinewave Cycles "Reactor" USB converter and it fried the power pack almost immediately, rendering it completely unresponsive. Since it was brand new, Garmin sent me a replacement. I do not blame Sinewave for this. I was too afraid to ever connect it directly again, and switched to a GoalZero Venture power bank as a cache battery instead, which is designed to handle the lower current from their solar panels, had the higher capacity I needed anyway, and as a bonus allowed me to drop the Out Front mount needed for the power pack (which was questionable for mountain biking in the first place) and put the 1030 back on my Stem.
I never did enough long-term testing to determine if the dyno was charging the battery (power pack or goal zero) while powering the Garmin, or if the battery was just passing through power from the dyno and not actually charging itself - as it's difficult to tell, given the battery will also drain when powering the Garmin while current from the dyno drops too low. I can say that, before it fried, I remember lots of beeping as I would speed up and slow down and power from the dyno would waver. So, overall, I was not pleased with the power pack as a solution with the dyno.
Hi Garmin-Shawn - grave dig... in relation to your comment:
"The charge pack will stop charging itself if it determines there is not enough power available from the external source and the voltage drops at its input. It will resume charging automatically when it detects the proper input conditions again."
Can you please give me some numbers here?
For example, something like;
If the input drops below 4.90V at a current draw of 50mA the Garmin charge powerpack will stop charging and will not restart until the voltage goes above 4.95V at a current draw of 50mA.
I'm trying to work out if my Klite USB charger from a SON28 dynamo will charge the Garmin Charge Powerpack efficiently for long term bikepacking before I purchase one.
regards,
Matthew
PS I'm an electronics engineer so you don't need to hold back on the detail ;-)
I have the same questions, did you ever get a satisfactory answer?
(I don't find these questions unexpected or strange in any way. People who buy these things do long bike rides. I need mine for a race that I expect to take at least 100 hours, perhaps 120)
If you have a power source in mind just test it. Their point is that there are so many USB cables and power bricks out there, some good quality and some very bad ones (if you pay $1 for a cable and $2 for the charger ou can be quite sure you have a piece of junk that does not meet many specs it says it does and is a fire hazard). Anyhow they will never be more specific. They just say use good quality ones and it should work fine. Mine is charging just fine with Apple power adapters.