How can i charge a supercapacitor

[fivewin]

I charged few minutes a 500f with a solar panel. I can lightup a low wattage ledbulb for approx 50minutes. I dont have to worry about dod and cyclus, thats what they told me. It will last longer than my own life.

Anyone have ideas how i can charge a supercap continuously offgrid during the evenings without using a battery or a windturbine? During the day no problem with solar.

[azdave]

Hop on a exercise bike with a generator rigged to it?

[fivewin]

Yeah, i have seen examples of handcrank charger.

Its now evening here and I just charged again 2 minutes but now with 1 li-ion 18650. I think i gain nothing, right?

[azdave]

I don't know your goals.

You say you do not want to use a battery (no worries about dod and cycles) but then you add a battery. I thought your goal was to only use a super-cap?

[fivewin]

Ive just received the supercap and im just testing now. My goal is indeed looking for alternatives to charge a supercap. Perhaps handcrank or diy (salt)waterbattery.

[Wy_White_Wolf]

Why not just have more supercaps so you can make it through the evening and night without needing to recharge them? Charge them all during the day.

WWW

[fivewin]

Supercap is all new for me. The explanation in the attached pict i can follow. Will parallel connection result in more joules and will the discharge time be extended? In otherwords will the duration of above lamp indeed be longer cq double?

I could not find examples of parallel, plenty of serials.

[fivewin]

While your coffee is still hot charge the supercap , just an idea with peltier low voltage generator which is easy to make it yourself.

Is it true that i then can lightUp 1w led for 1800 seconds after fully charge a 500f supercap in 1-2 minutes? Above example/pict is an ac lamp + joule thief dc-ac.

[bcroe]

Batteries are favored for loads, because they can charge and discharge much of their capacity
with a relatively small change in terminal voltage. This isn't true of capacitors; any exchange
of energy causes a direct change in voltage. The energy in a cap = 1/2 C Vsquared. If you plug in
upper and lower values of V, you can calculate the energy change for charging or discharging.
Bruce Roe

[fivewin]

Thats perhaps a joule thief is handy to use in combination with supercap