Charging bike battery from a secondary pack...

[Electro-Fox]

Hi everyone...
I am so close to finishing my electric fat bike, with the battery being the last thing needed. I will be using the Falco 48 volt 11.6 amp hour battery. I want to know what the best way I should charge it from my Goal Zero Sherpa 50 power pack. The pack is 50 Wh / 5200 mAh, and will have a 110 Volt inverter.
Here are the specs for the pack: http://www.goalzero.com/p/151/sherpa-50-power-pack/22:2/

So should I just plug my bike charger into the inverter of the Goal Zero? I know there is a loss doing it that way as it takes energy to convert to 110...right? Or...is there a way to safely connect the bike battery directly into the Sherpa 50? I am a nube on this stuff so bear with me. I am a bike camper, and will be taking the Sherpa 50 with me and have the solar panel to charge it while riding and in camp. I don't expect to get a full charge to the bike battery using the Sherpa, but would hope to get some charge of it.
I would appreciate any feedback you could give me.

Electro-Fox

 

[Eclectic]

I hope it's not too disappointing but...do you realize that you bike battery is 10x bigger than the Sherpa 50. That means you would have to charge the Sherpa battery 10x to charge your bike battery once. Some of those solar panels said as much as 16 hours to charge the Sherpa once. That would mean 160 hours of solar charging to charge your battery once. 160 hours / 8 hours per day = 20 days to charge your bike.

There are ways to charge an ebike with solar panels but unfortunately it is still a little difficult and expensive. There are a few solar projects here on this forum, you should be able to use the search function to find them.

 

[amberwolf]

We tried to explain this kind of thing to you before in your first topic:
http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=60948

 

[dogman dan]

Two miles of range at most, in the Sherpa. That's assuming your rate is typical, around 25 watt hours per mile.

Use the Sherpa to keep your phone, gps, headlights, etc running. That's it.

Solar charging is possible, it just takes a much larger panel, and some kind of charge controller or voltage converter. Hunt down the threads on it.

 

[Electro-Fox]

Thanks again....that's what I figured. I will use the Sherpa for just recharging my devices.