View Single Post
Old 09-26-2014, 03:10 PM   #131 (permalink)
redpoint5
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,819

Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

Lafawnda - CBR600 - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - Dodge/Cummins - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)

Model Y - '24 Tesla Y LR AWD

Pacifica Hybrid - '21 Chrysler Pacifica Hybrid
90 day: 43.3 mpg (US)
Thanks: 4,327
Thanked 4,480 Times in 3,445 Posts
The price has dropped on the BCAP3400 supercapacitors! They were originally $80, but are down to $71 each. If purchased in a quantity of 10 or more, the cost is $67 each.

These caps have a higher voltage rating than any other supercap on the market at 2.85v. Most others are rated at 2.5-2.7v

They have a peak voltage tolerance of 3v, which means it is likely possible to get away with running only 5 in series instead of 6. At 3400 farads, they have the largest capacity for the money.

Anyone want to buy 5 with me to get the quantity discount?

Quote:
Originally Posted by PaulB2 View Post
...Also I needed to turn up the idle a bit as at low rpm generators don't put much out and the headlight has to be on.

Anyway a couple of things worry me about this supercap business. Having your capacitance cut down to 1/6 or 1/5 by using caps in series seems a huge waste. And I worry about the voltage spikes in the system.
My CBR maintains 12v at 1000 RPM idle. Once I swap the 55w headlight out with a 35w HID, I will do another test to see if the voltage is held higher.

The voltage doesn't spike any more than using a battery, peaking at the output voltage of the generator/alternator.

__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote
The Following User Says Thank You to redpoint5 For This Useful Post:
Enki (09-27-2014)