ePowerBank
New Member
- Joined
- Apr 13, 2021
- Messages
- 133
Thank you to layout most efficient long lasting system - that's interesting for all the reasons you shared.I agree it's a quick and easy solution, but DIY.
Not a lot, all you do is not connect the p- and b- to the battery, but power source and Contactor
You let the BMS be the relay it actually is.
All it needs to do is monitoring, and act when one cell gets too high or too low.
If it can do Balance, that's a nice plus.
If your system needs to be 24/7 standby, it will have 24/7 power consumption.
Turning on the inverter already uses +50 watts.
Assuming you don't have the inverter powered 24/7, why would the BMS be?
Your not using the cells.
Simple 20A BMS , as stupid as they go, just a few parts
And you can get the best quality you like for about $50.
The quality Contactor... That will set you back a few bucks.
Good news, it probably will outlive you.
I bet forum has a good case study to ref (today's quest) - but if anyone could point me to one that'd be GREAT!
I've taken in many article's etc in this forum like a fire hose - so just need to sum it up now - pencils down as they say.
I'm a first-timer with goal to be up and running by end of May... Lord willing ;-)
Attached is the equipment / load overview - with 16S REPT cells due May 5th (started as EVE order due late June).
I was ready to pull the trigger on Overkill 100A 48v 16s BMS thinking, it's 100A 48V = 4800W, no worries for my 4400W inverter. So I decided to ignore surge numbers suggesting momentary +200A, since Overkill is good for 280A if <5s. Case closed, if I don't mind inefficiencies.
If I'm just a few parts away from doing "Contactor" based set up though, I'm curious to unravel I guess a small concept.
THANK YOU TO THIS WHOLE COMMUNITY - INCLUDING ONES BEHIND THE SCENES - IT'S INVALUABLE!