The extra ac/DC power suply.
How strong should this be ???
Can you send me a link to a working one ??
I already have a https://www.reichelt.com/ch/de/labornetzgeraet-0-30-v-0-5-a-stabilisiert-peaktech-6225-a-p178728.html?&trstct=pos_0&nbc=1 would this work (i dont really think it would)???
Is this the only one which works https://www.digitec.ch/de/s1/product/chargery-power-netzteil-s1500-rc-ladegeraet-3521537
Hi.
If money and space isn’t a factor then I’d say go big. I’m happy with my 14s14p battery. It’s about 42ah, 2.1kwh. 196 Samsung 30Q cells. If you’re limited by your VESC to 12s then think about going 16p. 12x16=192 cells. That’s 4 cells shy of my battery. You’ll get about 1h30m ride time.
I second the icharger X8. Great charger. I suggest buying it from Progressive RC. They sell on eBay too. The guy is super cool and will replace it if it quits working. I don’t like parallel charging both packs off one charger because this is such a large battery. I suggest charging one battery at a time, or buying two chargers and running them at the same time off of two server power supplies wired in series for 24v. I charge at 20ah rate which is 1.5a per cell. Best for long battery life.
Good luck with the build. Keep us updated.
I have The skyrc pc1080 charger and are happy with it.
If you want an easy charger that are running directly from on AC power I would go for that one.
Then you have possibility to plugin Both of your batteries and balance charge your two 6s battery packs up to 20A in The same time and it is easy to cary with you:)
The drawback is that it is not so flexible when it comes to configuration as icharger. Example i can not select if i want The charger to not charge More than to 4.10 volt per cell instead of 4.20 to save The battery cells. I usually monitor and reduce The charging amps when i reach 4.05 volts and stop around 4.10-4.15volt manually.
If you go for icharger you Will buy 2 pc server power supplies and modify Them so you connect them in serie to get 24 volt and high amps out if you want to be able to charge The batteries with many amps.
Thanks that is Really cool I was also thinking about building a 14s14p Battery. Now I read your Build posts and after that I think I have still some questions left to annoy you.
Are these the charger parts I would need ??
Hi.
That is the correct icharger. 
For the server power supply you need a big one. I use the 1200w HP. It’s easy to modify to work for our needs.
To make the power supply put out voltage you have to jumper two pins as shown in my picture. The easiest way to hook them in series it to just break one ground pin off. But, then the case on one of the power supplies becomes positive when hooked in series. The case of the other one is negative. So, if you let the cases touch they will both die. You can see how I isolated the cases on my build with left over acrylic from my battery box build.
Good luck with your build.
Link:
Screen shot:
Did you opened the Motor of your FR system and filled it with corrosionx ???
Hi.
Of course I did! 
The FR motor had some clear mineral oil in it. But, not very much. Maybe an ounce? I dumped that out and put about 4 ounces of CX in it.
Any sealed inrunner type motor absolutely needs to have oil in it to lubricate the bearings, protect against corrosion and preserve the shaft seal.
If I want to get as close as possible to the 50 kmh do you think that the FR engine system is the only solution or is a 65161 120kv also powerful enough?
Even with a very high quality propeller I do not think you will see 50 km/h from a 65161. The motor just dose not have the torque required. maybe aim for 35 km/h. or buy a FR setup . even then you will have a lot of other problems to consider such as your weight , wing size & run time etc. as far as i know 50 is the record that FR has done. He is industry leader he sells to other manufactures & in my opinion the very best. If you build a geared setup you would find the required torque.
Yeah thats why I was asking New Idea!!! (I dont want to go 50 just as near as possible)
My new idea is FR engine kit Gong Veloce m Wing 14s14p Battery and I am 63kg
(Do you now a fast Build with geard setup would be interested?)
regards IN
Not sure sorry, I am not interested in high speed on water. falling off at around 50 it would feel the same as jumping out of a car doing 50. I stacked water skiing @ 30 knots it hurt ! almost broke my back.
You got my interest up so i looked, .The info is on the forum What’s your top speed? - Builds - FOIL.zone
Thanks for that post link that is exactly what I was looking for !!!
Anyone have a lead on a decent size injection molded battery box. Working on a second build. Injection molded instead of custom built will have the cleanest look. Assuming I can find the right size; battery configuration and hatch size will be determined by the box. Current plan is to have electronics in one waterproofed box and battery in another (waterproofing to be achieved by sealants. Silicone or 4200 to cut down on the bulkiness of commercial waterproof boxes). All inside a waterproof hatch for redundancy, which I assume is what commercial boards are doing? As a reference I’ve been looking at the lift battery pack made by lithos.
Regards,
TJ
Buy the Battery from Lift.
It’s only 3500 
.
Thank you so much @Alexandre, that’s what I wanted, this formula !
Regarding the design I’ll go to make 2 x 6s16p but I want to be able to seal the case and don’t have to touch them/ connect them together. So how can I charge them with one or two 6s charger ? Do I have to install a switch between the two batteries and use it when I charge them separately ?
And last question, do I really need a switch ?
Thank you again !
Cheers
Hey,
I’ve been looking after this and here is the big problem : when considering injection molding there are tooling cost needed for the mold. Those are pretty high, around 5k$ I think or more depending on the design.
I have designed a custom battery case that fits 14S14P but can also be used for 12S. Actually if more than 10-20 members where interested we can publicly ask for a quote (no profit) and make a group buy. Problem is that I have no idea if people are interested or are willing to group buy it (case is made of : main part where you put the battery, external IP68 connector for up to 16 wires signal - might be used for external BMS charge or CAN bus communication, aluminium engraved top plate, Oring fitted for the case, screws, removable power plug (customizable according to current consumption) and IP68 too, degas valve on the bottom side. Case is 82 mm height too 
Thanks for the feedback but coordinating a group and manufacture adds a degree of complication I’m not looking for. If it comes down to it I’ll build one. I figure there is something out there that can be adapted for our use. It’s a matter of finding it, so far I’ve had no luck.
Not sure if it help but this the box I 3d prtined and glassed it. For beter thermal perfomance I embedded ALU shet under the cells, isolated with 3mm thermal silicone pads
BMS is custom made and uses the same charger that comes with lift with all the advanced features and Industry standards protections
I think I can share the box I just need to ask the friend who helped designing the box
