12 volt Battery
 

I am considering doing the following. I am going to take screw terminal capacitors
16volt uf and make a hybrid battery...
So like one capacitor attached/wired to anode and one attached /wired to cathode.
I am curious how stable this would be for a automotive 12 volt power electronic.........

Check out this thread on the subject of replacing an automotive battery with a series of capacitors.

How many uF were you thinking? Are you deleting the battery, or just connecting in parallel with it?

I'll begin experimenting with capacitors soon...

I am not set on the uf rating yet.... and may even go 30 volt... These would be parallel . I am want to make the low voltage battery I have more usable 11-12volt battery

Universal Fuel Saver Voltage Stabilizer Regulator Grounding Pivot Mega Raizin | eBay
this is just one ebay listing the range of price is from 25 dollars and upward to 200 dollars

if you want to make any noticable difference to the electrical system, expect to measure capacitance in F, not uF.

Look on ebay you can get 1 and 2 Farad capacitors rated at 24v for fairly cheap.

Adding a little to this thought...
Each farad can store about 100 joules at battery voltage (about 14.5 volts) 1 joule is 1 watt-second. So 1 F could store 100 watt-seconds. That's if you can convert the whole charge down to 0 volts. I guess you'd better assume you could use the top 30%, 14.5 volts down to 10 volts - you need 3 times as much capacity.

There is a hybrid cap called the Stinger available from car audio sources, it seems to be a combo capacitor & lithium battery which emulates 50 F. They cost about $200 each.
If you attached one of these in parallel with your battery, you'd gain 50 farad If you could use about a third of that (14.5 v down to 9.6 v) it would provide about 1,666 watt second. About 20 amps for 7 seconds to run your lights and radio.

-mort

i don't know what kind of ESR the "Stinger" would have, but let's assume it is something quite usable.... 1,666 watt-seconds could almost entirely replace a battery. if it were all drawn within 1 second, that is almost 120 amps, which is enough to run a starter motor on nearly anything that isn't a semi or larger.

Okay
I checked out ebay and there are several choices which range from 2 farad, 10 farad,
20farad, 30farad and 50 farad. The price issue makes the 66 dollar 20 farad look promising canadidate componet.....
New Hybrid Planet Audio PC20F 20 Farad Digital Power Car Auido Capacitor | eBay

Does anyone know how these are wired to the vehicle

Cross-post from another thread....

My ultracap bank is seven 2600 Farad Maxwells, put together with a balancer by EBay seller cusdn. Here's a current listing for an identical version.

Maxwell BCAP0010 7 Ultracapacitor Surge Booster Assembly | eBay

I put it inside a plastic box with an Anderson connector, so can easily swap it from vehicle-to-vehicle. It can crank the 6.9L International IDI diesel all by itself, but sure puts a load on the alternator right away, since ultracaps want those electrons back just as fast as they'll give 'em up!
I've yet to try it for a long drive in the EV conversion, but intend to.

Hadn't put two-and-two together yet for using it as part of an alternator shutoff/delete. Running off the ultracap only provides such a small buffer that it would pert' near immediately transfer all load to the alternator, but switching in a lithium house battery that can maintain 15V under load sounds like a great way to unload the alternator. Thanks!