I am at a loss here... I ave been looking for some time and haven't had any luck finding a solution with this problem.
I have a battery/charger that I want to monitor with an Arduino. I want to know when the system is on the mains or battery, when the battery is charging, when it is fully charged, and the charge % remaining.
The battery type is debatable... Lead-acid will probably be my choice since this is sort of a UPS-type project, but if a different battery type makes more sense, I'm open to that. As long as it produces roughly 12v and has something like 10aH capacity.
I have no desire to re-invent the wheel here. I just want to know the status of the charging system without spending an arm and a leg on a beast of a charger.
I really don't want to use an off-the-shelf UPS like an APC unit... I bare board would be fine so long as it has the desired data available. I found a model by Meanwell that is close, but it only provides contact closure information - When it is on battery and when the battery is almost dead. I would prefer more information. Any thoughts?