XS Power SB1000-31 12V 8000 Watt 1000 Farad Super Capacitor Bank

The SB1000-31 is a 12V XS SuperBANK ultracapacitor bank: 1,000 farads rated for up to 8,000W of max power, in a package that weighs 22 lb. Instead of storing energy chemically, it stores it electrostatically, so it can release a large surge instantly and refill in seconds, over and over.

In a high-power car audio system, it supplies current the moment the amplifiers demand it, which holds system voltage steadier on heavy bass notes. In a starting system, it sends a surge to the 12V battery while the engine cranks, then recharges within a few seconds. Steadier voltage is easier on batteries, starters, relays, and engine control modules, which lowers the odds of expensive electrical repairs later.

Ultracaps also work well at temperature extremes. In winter, the bank supplies the burst of current that a cold, slow-cranking AGM battery cannot deliver quickly. Rated to more than a million cycles, it is built for commercial vehicles and everyday commuter cars and normally lasts more than a decade.

The BCI Group 31 case fits the factory battery position and measures 12.99" L x 8.43" H x 6.81" W, and multiple cells can be connected together to build a custom power pack sized to your system. M6 terminal hardware is included.