Batrium Watchmon
free software to monitor your 18650 setups
Screenshots
Hunter's comment
you kinda need the hardware to use the software thus the software is free but it's a radical free piece of software that gives you a visual indication of how will your connected battery setup is doing, great for 18650 setups with solar panels.
Link
https://www.batrium.com/collections/software/products/watchmon-toolkit
This is posted on Steemhunt - A place where you can dig products and earn STEEM.
View on Steemhunt.com