Supercapacitors

[The Jeepster]

Anyone had any experience using these on a trawler?

 

[meridian]

What are they?

 

[gsholz]

What would you be using them for? Compared to batteries SC have low energy density. Energy stored goes with the voltage squared. So you’d want about 500V but each SC is typically only 3V or so. You’d have to put about 200 in series which reduces capacitance by that factor. SCs are interesting if you need lots of instantaneous current but don’t need a lot of energy.