07-21-2019, 05:04 AM
(This post was last modified: 07-21-2019, 09:17 AM by stuartiannaylor.)
I posted a power answer on the Pine-a64 section whilst thinking about a RockPro64, doh!
I have thought for a while that @ 12V $/Ah lead acid are still extremely viable and the panel alarm batteries for the purpose of UPS size wise are not lithium compact but still for how we might use them compact.
I thought I would mention this as there are a rake of panels and equipment for this but focus seems to often be LiPo with limited current capacity with relatively small mAh and big $.
There are panels but this board I found interested me https://www.aliexpress.com/item/32953515494.html
Even branded NP7-12L Yuasa 12v 7Ah sealed lead acid battery cost approx £13
Add an I2C voltage current sense to the output https://www.ebay.co.uk/itm/302997431044
A charger circuit https://www.aliexpress.com/item/33050778041.html
Main voltage current sense is on battery output and optional voltage current sense on charger output.
That you have the basis of an extremely sophisticated UPS battery power system for £30, but much can be rescued from old alarm panels / emergency lighting.
I have thought for a while that @ 12V $/Ah lead acid are still extremely viable and the panel alarm batteries for the purpose of UPS size wise are not lithium compact but still for how we might use them compact.
I thought I would mention this as there are a rake of panels and equipment for this but focus seems to often be LiPo with limited current capacity with relatively small mAh and big $.
There are panels but this board I found interested me https://www.aliexpress.com/item/32953515494.html
Even branded NP7-12L Yuasa 12v 7Ah sealed lead acid battery cost approx £13
Add an I2C voltage current sense to the output https://www.ebay.co.uk/itm/302997431044
A charger circuit https://www.aliexpress.com/item/33050778041.html
Main voltage current sense is on battery output and optional voltage current sense on charger output.
That you have the basis of an extremely sophisticated UPS battery power system for £30, but much can be rescued from old alarm panels / emergency lighting.
