Recent content by Indefatiguable

You know, as someone who found this thread while posting a question about eg4 batteries before buying I gotta say it's REALLY cool to see people from said company paying attention to, engaging with, and troubleshooting problems. You folks should have my order Friday next.

I thought so bro, thanks

Hey all, I'm considering buying multiple 48v100ah eg4 batteries and wiring them in Parallel. My question is when I do that is the (100a) discharge rating of each batteries bms added together (as in 2p has 200a rating)? My head says yes but my wife says make sure. I've emailed them but no...

Ah yes I forgot hydrodynamic generation (yes controller is capable). Hard to get exact numbers, but from looking at other people's systems I estimate around 200-350w while sailing. The whole charging issue is really pretty tricky. Boat gets anchored in the Lee (hiding from wind) of some...

Also, it's important to remember the existing/old drive system was rated at 52 ft lbs at 2000rpm *at the crank* then put through a 2:1 reduction, resulting in the actual prop spinning 1000rpms with 104 ft lbs pushing it. Those are existing parameters (104 ft lbs / 1000 rpm) I'm trying to match...

Few things, The gearbox from the old volvo is already gone, just have a keyed end of a prob shaft hanging there. The kit I bought came with a coupler and thrust bearing as part of the new belt drive. Applicable piece: https://www.thunderstruck-ev.com/custom-ac-gear-reduction.html I have...

Dude using that graph what are your thoughts on swapping the belt pullys from 1:1 to 5:1 (5000 motor/1000 shaft), seems like that'd be more efficient. I suppose that'd be reducing effective torque from 105 to ~15×5 though. Hmm.

Ah shite. Yep was reading on the left. Dude thank you. 1000a rec bms it is. I'm gonna have to redo my range projections and likely my bank design to compensate. This is why this forum is awesome, you just saved me x wasted expense and y crappy headaches. Thank you.

Yeah I just checked power graph. Md2b rated 52 ft lbs, had 2:1 reduction. Cruised at 2000 engine rpms. Hpevs ac-34, 1:1 gearing, rated 105 ft lbs / 70 amps @ 1000 motor rpms. So yeah, 60 works as cruising speed. Tad slow, tad efficient. Dam you for making me recheck my design lol ?

I've mathed this out so many times before buying the motor kit, I'm pretty sure the guy at thunderstruck and I agreed that relative efficiency gains vs Volvo pretty dramatically reduced rated output requirements, to the tune of like 20%. I have the power output chart pdf somewhere. 60a...

Well again the 60a number is supposed to equate to cruising speed. Was a md2b, rated 16hp max. Hand crank start. So yeah that's about right, maybe a tad slow but it's a baseline #.

Hey yep took me awhile to reply. Yeah project is an inboard 48v dc motor for a big 18000lb liveaboard. Using the old diesels power rating @ rpm vs new motors power rating (and amp draw) @ similar ram (after gearing) I'm fairly confident that a 60 amp draw will equate to a similar hull speed...

Yeah those are the ones I came up with too, I'll give them a call post Xmas, project isn't funded until Jan anyway. Thanks bud

Yeah I'm super jealous. You listed the distance to the best big box store to buy solar panels at in nautical miles. Hopefully I get this boat done and will see for myself someday, but your part of the world sounds cool af bud.

Yup they carry exactly the stuff I'd need. Thanks man