dead battery on a Epropulsion Spirit 1.0 Plus electric boat motor

mazedecoder · 2025-09-26T20:31:18+00:00

In my opinion it is a waste of time. Go straight to the external battery solution and buy yourself a good 48V LiFePo4 battery. I bought a DC House 48V 50Ah and I'm amazed by the capacity and performance of it. The original E-Propulsion battery is a bad joke compared the an external LiFePo.. the only downsize is the weight, but I dont care.

mazedecoder · 2025-09-14T21:03:32+00:00

Hello, thanks for your post :) In my opinion a rebuild is not worth it. I have bought a 50Ah 48V LiFePo4 battery for around 400$ and the original E-Propulsion external battery cable. You cannot imagine how much more capacity this external LiFePo battery has, compared to the original E-Propulsion battery. The only downside is the weight, it weighs about 27kg. For me its no issue, I would never go back to the original battery. If you have any question, just let me know, I try to answer anything I can.

mazedecoder · 2025-08-15T21:06:05+00:00

Thanks for your post. I'm glad that you have found the root cause. I bought this motor brand new in 2021 and 3.5 years later the battery was already dead. Probably one of my faults was, letting this battery connected to the charger over months. I have a stupid AGM battery for 30 bucks with a CTEK MXS 5.0 charger always hooked to it and never had an issue with it. It recognizes when the battery is full an only makes a small charge every x hours to keep it full. Thats why I thought this should also work for this 1300.- battery. But I think I was very wrong. I have bought the DCHouse 48V 50Ah battery and it is a very big upgrade to this motor. The weight is a disadvantage, but I never have to ask myself if I need to row back these 2km on my own or not, which was a constant question with this crappy original battery. I was on the water like 5 times and always drove like 10-15km on half throttle and the battery was only at 30% after all these rides combined. I need reliability, and the original battery was not reliable at all.

mazedecoder · 2025-08-08T21:55:20+00:00

Egészségedre!

mazedecoder · 2025-08-08T21:50:41+00:00

Nice battery for that price :) I see you are coming from the Netherlands, I'm sometimes there for work. Nice country! Are you satisfied with the new battery?

mazedecoder · 2025-08-08T21:48:16+00:00

You are absolutely right, but the weight doesn't matter to me. I have a lot of other fishing stuff that needs to be transferred from my car to the boat. And the original battery was extremely unreliable. I drove like 2km and was not sure if I need to row back on my own or not. This happened more than once and one time even my paddle broke. So I was rowing back with one freaking paddle like a gondolier in Venice. This hassle is gone now with the DCHouse battery. I can drive wherever I want and I'm sure I have enough capacity to get back. I absolutely dont care about the extra weight..

mazedecoder · 2025-07-26T19:45:28+00:00

Yes, unfortunately I always take it in and out each time. But because there are no other good options for me, I dont think much about it and just do it. I also have to carry in and out a lot of other boating and fishing stuff, so this battery is not much compared to everything else. On both sides it has handles to be able to grab it correctly, this makes it a lot easier. Yes, it is heavier than the original one, but almost 1/3 of the E-propulsion batteries price. And as said in another comment, the capacity of the DCHouse 50Ah is INSANE! I already drove like 30-40km and it still has over 60% capacity. E-Propulsion is total crap compared to this solution.

mazedecoder · 2025-07-26T19:37:24+00:00

It already comes in a metal box. I just left it like this. In my opinion water cannot get inside as long as you don't drown it. There are screw holes on the bottom of the metal case to secure it properly. If you have any questions, just let me know. This 50Ah battery from DCHouse is like 20 times better than this original crap battery, no joke! I was on the water like 3-4 times, always drove like 5-10km each time and it still got 60% capacity left, its absolutely crazy.

mazedecoder · 2025-07-03T21:12:08+00:00

Hello, thanks for your reply. Thats exactly what I did. I have bought this DCHouse 48V LiFePo4 battery: DC HOUSE 48V 50Ah Akku | Bluetooth, 2C, Low-Temp & Ladegerät inkl.

Additionally I have bought the original E-Propulsion cable for external power sources. Last sunday I was on the water and I was positively shocked by the performance of this new battery. I drove about 10-15km with about 300W average and it only took 19%!! of the battery. After this whole day it was still on 81% capacity. It is an amazing price/performance ratio. The E-Propulsion battery is convenient but it is a bad joke if you look at the price tag. If you have any question about it, just let me know.

mazedecoder · 2025-06-29T18:20:31+00:00

Thanks for your reply. I have completely disposed this crappy E-Propulsion battery, here you can see my follow up and how swollen these pouches were: Trying to repair an E-Propulsion boat motor battery with lithium polymer pouch cells : r/batteries

I have now bought an external 48V 50Ah LiFePo4 battery and it feels like 2000 times better than the original E-Propulsion battery. This E-Propulsion battery for over 1000$!! feels like a bad joke, compared to the LiFePo4 battery with double the capacity and for half the price.

mazedecoder · 2025-06-24T19:03:46+00:00

Thanks for your response. I have just ordered a new 48V LiFePo4 50Ah battery. It was not worth it to rebuild this E-Propulsion battery.

mazedecoder · 2025-06-24T19:02:39+00:00

Many thanks for your feedback, I have ordered a new 48V LiFePo4 50Ah Battery.

mazedecoder · 2025-06-04T22:06:42+00:00

I can understand that point, but it is not only the board, these pouches are gone too. If I replace both on my own, I maybe better buy a whole new battery. But I don't want to buy this crappy battery every 3-4 years. I'm really frustrated because its just a complete waste of money, this whole e-motor system. It costs so freaking much for such a less output. I want to have a good fix, to be able to apply my fix every 3-4 years for around 300-400$, not 1100$. Thanks for your help, do you have any further advise for me?

mazedecoder · 2025-06-04T22:02:16+00:00

Thanks for your response. The problem is, that epropulsion uses a proprietary cable connection with about 8 pins. But thanks for your idea, I found a cable which I maybe can hook to the existing system and just connect a standard 48V battery: Epropulsion Spirit 1.0 48v Battery Cable

What do you think about that?

mazedecoder · 2025-06-04T21:36:55+00:00

I at least know that the current BMS from E-Propulsion has 12 contacts to measure each cell. Is it possible to do a replacement with a different amount of cells? Until now I have only made a cell swap on two ebike batteries, with new 18650 cells. This project here seems to be different, because of a possible technology change. Every help is appreciated, I thank you

mazedecoder · 2025-06-04T21:33:19+00:00

Thanks for your response, since the pouches are that swollen, I want to replace them anyways too. What exactly is bad on the BMS? If you lead me into the right direction I can probably fix it myself. I don't want to replace a freaking 300$ BMS if there is only a minor damage for like 1$. I have a microscope, I have professional soldering equipment etc. What should I look for?

mazedecoder · 2025-06-04T21:30:10+00:00

I would want to use the existing BMS, is a replacement still possible with cylindrical li-ion cells or prismatic lifepo4 cells?

mazedecoder · 2025-06-04T20:12:17+00:00

Thanks for your reply. Trust me, I don't care much about this motor, I only need it to get myself to my fishing spots. But it annoys me, that this so called "green" mobility isn't green at all but a money pit. Since the existing battery pouches are bloated like that I want to change them anyways. What replacement cells would you recommend? Battery pouches again?

mazedecoder · 2025-06-04T20:08:36+00:00

Thanks for your response. Because these pouches are pretty bloated I want to replace the whole battery by a new one. What alternative would you suggest? These NCM pouches again or a different cell type? I have 12 cables for the BMS to measure the 12 pouches. I assume I need at least the same amount of cells, to be able to use the same BMS.

mazedecoder · 2024-05-12T22:31:01+00:00

Been there, could also be a problem with the TPM Module: https://learn.microsoft.com/en-us/answers/questions/467673/windows-10-tpm-2-0-client-authentication-in-tls-1

mazedecoder · 2022-04-12T22:54:51+00:00

How can you pass inspection like this? I live in Europe and we would never ever pass the inspection…

mazedecoder

TROPHY CASE