Supercapacitor experiments

Greencap 16V 83F (6x 2.7V 500F)

Each cap can handle 2.7V long term, 2.85V short term. Balancer starts discharging overcharged caps through 1 ohm power resistor once they overshoot 2.8 - 2.85 V.

Self discharge current is expected to stabilize at relatively low value after 100 hours of being charged.

Absorbtion current (initial)

Leakage current (constant)

Replacing lead acid battery with supercapacitor

UPS (replaced 12V 7Ah)

There is some inefficiency in conversion from 12VDC to 220VAC

UPS stops discharging at 10.2V (under load, which might translate to ~11V with no load)

8W LED was running for over 5 minutes

100W incadescent bulb was running for 30 seconds

Piaggio scooter (replaced 12V 10Ah AGM)

Charges to 14.4V (in ~1 minute)

After sitting for 9 hours voltage drops to 12.2V (cranks up)

After sitting for 15 hours voltage drops to 11.2V (cranks up)

After sitting for 22 hours voltage drops to 10V

At 8V (cannot crank up)