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John, Thanks for your input and good point about having an ace in the hole! Chris Sent from myPhone

Hey everyone, thanks so much for your feedback! On my motor what I’m assuming is the board is located as part of a fully encapsulated unit that flush fits in the back and attached with the 3 cross

I don't have a LOT of experience with this, but am now running my electric dinghy with two separate 48V ebike batteries. I like keeping them separate so that if one gets accidentally discharged (or

It is my understanding that the BMS only protects the battery cells from over or under voltages - there may be some out there that can handle connecting/disconnecting a pair of battery packs safely -

Reuben, Would not the BMS protect the packs if they were inadvertently paralleled when having different states of charge? Chris Sent from myPhone

Bobkart, As I mentioned earlier to Reuben, I have a fear of a BMS failure ruining my day. I would like them in parallel for capacity reasons, and separately for failure reasons. I don’t think I’d

I have had a cell fail. I just removed it from the string making it 15s - I list a bit of AH but the motors run fine. if a BMS were to fail leaving you stranded, just disconnect it temporarily and

Miles, Thanks for the reply. I currently have 2 X 48V banks of golf cart batteries. Each bank has a Blue Sea 300A rated on/off switch that ties to a common 48V bus. I have ram in parallel, never one

Reuben, Thanks for the reply. I haven’t given that much consideration yet. Seems like I’ve heard possible reliability issues with the larger cells, maybe not a concern. The other thing for me is

Downsides to paralleling two separate strings is you will need two BMSs. And if the strings are sometimes not in parallel, then separate capacity monitoring is called for. Charging can happen in

Thought: Dangerous for the switch unless it’s a break-before-make or other exclusive-or arrangement. Why: You’ve been running for hours on one string, then decide to switch to the other. If

Why not use 500AH cells? Make a single 16s string and keep it simple? Does Victron make a BMS that can communicate with your charger? For my twin 10kW motors. I have a single 16s string with 1,000AH

Bobkart, Thanks for the reply. Actually I’m proposing to have 2 independent 16 cell strings with the ability to parallel them at the 48V level with switches, not at the cell level. Thoughts on

Connecting two 230Ah cells together in parallel (sixteen times) would allow you to treat the 32 cells as one large 16S 48V x 460Ah battery BMS, load, charger, capacity monitoring would be

Hi Group, My Morgan Out Island 41 is ready for new batteries. I’m ready to embrace LiFePO4. When I originally converted to electric I built and glassed in 2 battery boxes to hold 2 banks of 8 (16

The RMB29 datasheet says it has conformal coating.? For more challenging environments I would add a Silicon coating like Dow Corning 3-1765 or 3-1953 avoiding excess buildup on on the IC body

Yes ! You need to power the board: with the controller switched on, or disconnect the sensor and use an external +5V supply. Then, with an oscilloscope and by turning the motor, you can see the sine

is there a way to test the board on the motor? TIM HOOPER DIRECTOR ____ t 03 9690 2788 f 03 9690 2899 w acumendesign.com.au 6/132 Bank St South Melbourne Victoria 3205 acumen

Yea 9 times out of 10 its the encoder (position sensor) that fails and if the motor gets they will get wet and fail. Always good to have a spare on board. If you install the replacement carefully you

Interesting to learn that the angular position sensor boards have this level of failure rate. On balance, my 20yr old ETEK brush motor (on 4th set of brushes) setup doesn’t look so bad even today