station240
Member
- Joined
- Oct 9, 2016
- Messages
- 177
Small pack I'm working on.
For now to be 12V nominal SLA battery replacement, for my under desk UPS.
These are A123 LiFePO4 (lithium iron phosphate) cells, recovered from faulty drill battery.
Long term projects/plans.
These mostly involve Project UPS aka Project Fridge
This should give you some idea of how large and heavy this UPS is.
a) 12/48V battery for DC Contactors, cell/voltage monitors, other electronics.
b) Powerwall for big UPS, which didn't come with any batteries. Did however come with a complete set of unused high current battery cables.
c) Project MPPT, inject power into the UPS from solar panels. Re purposing a mostly functional Grid Tie Inverter, which isn't able to be used for it's original purpose.
Could be repaired fully, but I'm not interested in spending the $40 needed to repair the inverter output.
Completed sub projects:
a) Teach the fridge to not require 3 phase power, my tricking the low voltage electronics. Suspect it may not power up with only battery power.
b) Disable the inbuilt charger for Lead Acid batteries. Turned out to be as simple as unplugging the connector to that half of the PCB.
For now to be 12V nominal SLA battery replacement, for my under desk UPS.
These are A123 LiFePO4 (lithium iron phosphate) cells, recovered from faulty drill battery.
Long term projects/plans.
These mostly involve Project UPS aka Project Fridge
This should give you some idea of how large and heavy this UPS is.
a) 12/48V battery for DC Contactors, cell/voltage monitors, other electronics.
b) Powerwall for big UPS, which didn't come with any batteries. Did however come with a complete set of unused high current battery cables.
c) Project MPPT, inject power into the UPS from solar panels. Re purposing a mostly functional Grid Tie Inverter, which isn't able to be used for it's original purpose.
Could be repaired fully, but I'm not interested in spending the $40 needed to repair the inverter output.
Completed sub projects:
a) Teach the fridge to not require 3 phase power, my tricking the low voltage electronics. Suspect it may not power up with only battery power.
b) Disable the inbuilt charger for Lead Acid batteries. Turned out to be as simple as unplugging the connector to that half of the PCB.