Grooooan. koyu.space is shutting down. Going to have to move servers again.
| Location | Austin, TX |
| OS | Haiku, Linux |
| Programming | Rust,Ruby,C,more |
| Website | http://terarocket.io |
kallisti5
- 50 Followers
- 10 Following
- 93 Posts
Haiku Developer, certified Linux Ninja, Open Source Juggernaut
I did away with the full BMS and opted for a simple LifePo4 battery balancer. The solar MPPT charge controller can use custom profiles so I can set a maximum charge voltage and a cut off. I'll need a low voltage cut-off to protect the batteries from getting over-drained, but I'm guessing I can rig something together cheaply for that.
Solar energy at the moment is intense, and my loads are not very heavy.
Alright, alright, alright. My baby off-grid #solar #lifepo4 #battery array can slowly charge my car. Batteries not even breaking a sweat at 95A draw. (About 0.5C rate).
https://www.theverge.com/23270191/framework-laptop-12th-gen-2022-review
Great job Framework! I've been really happy with mine! #laptop #devops #sre #tech
#LiFePO4 balancing done. Just have to strap a BMS to the pack and hook her up to the off-grid #Solar MPPT array
Alright. #LifePo4 cells matched and paired up. 2P done, next is 4S. Going to try and join them with a 200A ANL fuse.. just for extra "oh shit" safety 😂
@Gladox114 I have a rural well house out in the country with 400w of solar strapped to it. I power an inverter to keep all my tool batteries charged and run a few various things off grid.
This bank of LifePo4 is going to replace some really old and worn out lead acid batteries.
Bought these LifePo4 cells on AliExpress for the same price two new car batteries would cost.
If you're looking for something new, #throwing
#knives are a great way to burn some energy under a shady tree during the summer. It doesn't cost much to get into (< $20). As a side benefit you can pretend you're a ninja.
#knives are a great way to burn some energy under a shady tree during the summer. It doesn't cost much to get into (< $20). As a side benefit you can pretend you're a ninja.
@fifonetworks as for the 175A.. I want to size the wire bigger than needed to help cut losses. I'm really riding the line for that 1500W (120A + 20% efficiently loss) inverter until I can afford to build a second pack.
@fifonetworks 175A is not really the design goal. My normal use is well under that at around 20-120A for a 1500W inverter.
These batteries are rated for 1C discharge which is roughly 90A. I *might* be able to get them up to 180A since I'm 2P/4S.. but I'm guessing it wouldn't be a good place to be since individual cells could push over 90A.
As for cooling.. just air cooled with a low temperature charge shutoff via a 100A LifePo4 BMS