One of the main hurdles for me is that I do not feel confident enough to build my own battery, everything else I should be ok with.
So I’ve been looking at ready build batteries for e-bikes and similar. So me question to some of you more experienced builds is; are those batteries good enough? I don’t mean are they the best option, but are they good enough for a first build and to get up on the foil and have enough Ah to stay out on the water for 30 min or more?
I.e. would it an option to use two of these batteries in parallel so that it is 13s6p with 48V nominal and 120 Ah in total or is a complete bust going that way?
You could use 2x6S LiPos in series, or 2 in series 2 in parallel to get 12S. For example tattu, somthing like these: US $212.48 17％ Off | TATTU 22000mAh 22.2V 6S LiPO Battery Burst 25C for Big Load Multirotor FPV Drone Hexacopter Octocopter https://a.aliexpress.com/_mOeVCot
I run my efoil with LiPos but I would build a pack from Samsung 30Q 18650 or Molicel INR21700 P42, better value and safer than LiPos.
If you use this you will have cells in your hand. If you have the cells in your hand, spot-welder them. It’s not rocket science, even I could manage to do it.
Maybe - I just want to make it a secure and reliable as possible so that my big kids can take the board out with their friends and I don’t have to worry about anything. Of course they will be careful and not trash it around, but use it as it’s supposed to be used.
i think it would be fine, just educate them about how dangerous lipos can be. lipos are great but you have to charge them one by one, whereas a lion battery with a bms, just get a charger that is the voltege of the battery and around 15a and you just plug it in and the bms deals with all the charging and balancing of the cells.
Sorry, but that is reckless advice at best. No one here wants to see a house get burned down. Lipos should only be used in efoils by very experienced and knowledgeable people. They should only be charged where you would want to build a large fire, especially in the energy density and amounts necessary for an efoil.
Yes sorry, you are very right. i am just used to hobby grade lipos at most 4s (so not a lot of power)
i totally agree with you especially with up to four 6s lipos.
that said there really isn’t a battery with enough voltage and amps that is not a fire hazered, all im saying is to have enough power to get onto foil there is just not a “safe” battery option.
Hi - amazing build! I was wondering about your connectors - in the video it looks like the motor cables are connected with basic hobby RC connectors, is that correct and which connectors did go with? For the battery - are you using AS150 connectors inside and outside the battery box? (How) Do you connect the two batteries inside the box, as there are only two wires coming out of it? If you could share photo of the battery box wiring as of today, that would be great!
Cheers from Hamburg!
Jup, for the motorcables we used basic banana plug connectors, i think 5.5mm. All the battery connectors are AS150, i can send you a photo later this day or tomorrow. There is also a german diy efoil group on telegram if you want to join?
Greetings from Leipzig
