XS Power AK3000

1/0 Gauge XP FLEX CCA Secondary Battery Installation Wiring Kit

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XS Power AK3000

Secondary Battery Installation Kit

XS Power has taken the guesswork work out of secondary battery installation. The XS Power AK3000 comes with all the wiring and fusing you'll need to install that second battery you've always wanted for your audio/electrical system. It is designed for 3000-3500 watt audio systems and features 1/0 gauge pre terminated Copper Clad Aluminum power/ground wire, dual ANL fuse holders with 300 Amp fuses installed and all the install accessories (zip ties, wire clamps and screws) required.

What's In The Box?
  • (1) 18 ft. 1/0 Gauge XP FLEX BL Cable
  • (1) 3 ft. 1/0 Gauge XP FLEX Ground Cable
  • (6) XS Power Brand Heat Shrink
  • (6) 1/0 Gauge Crimp Terminals
  • (2) Battery Clamps
  • (2) Grommets
  • (2) Fuse Holder, ANL, Set Screws
  • (2) Fuse, ANL, 300A
  • (10) Wire Clamps
  • (10) Zip Ties
  • (10) Screws

General Features:

  • Secondary Battery Installation Kit
  • 1/0 gauge Pre Ring terminated power and ground wire with protective heat shrink wrap
  • Designed for systems up to 3000-3500 watts
  • Thick but flexible Copper Clad Aluminum wiring
  • XP FLEX Frosted Black ground wire
  • XP FLEX Frosted Blue ground wire
  • Fuse Holder Dimensions: 4-3/4"W x 1-1/2"D x 1-1/2"H
  • Also found as: xsp-ak3000, AK 3000
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Recommended Accessories:

  • A Battery Isolator is STRONGLY recommended when installing a second battery:
    • Prevents secondary battery from draining the starting battery
  • Big 3 Upgrade Kits:
    • To get the most out of your new power system check out our Big Three Upgrade Kits

Check out the XS Power AK3000 Installation Procedure

Power / Ground Cable Specifications

Wire / Cable Type
Wires and cables are made for different uses. This use that the wire or cable is made for.

Please make sure that the wire you are purchasing matches the intended use.

This the how long the item is. When purchasing an item that requires a specific length (such as RCA interconnect cables or speaker wire), please make sure that the length of the item is long enough for your needs.
Wire Gauge
The measurement of the diameter of wire. As the gauge number increases the size of the wire decreases. As the wire gauge number decreases, the diameter of the wire increases. For example, an 8 gauge wire is going to be larger than a 16 gauge wire.

When purchasing wire, make sure that you know what size, or gauge of wire is needed.

Primary Color
This is the main color of the item.
Complies to AWG Standards
Since 1857, The AWG (American Wire Gauge) system has been the standard for measuring the diameter of wire. AWG standard is the measure of bare wire to find true gauge. Companies that do not follow AWG Standards include the thickness of the wire jacket which means the actual wire is not "True to Gauge".
Wire Material
The material that the wire is made of. Copper & aluminum are the most commonly used materials. OFC - Oxygen Free Copper is the ideal choice for wire material. Copper is a superior electrical conductor, & does not expand or contract with heat. CCA - Copper-Clad Aluminum is a suitable choice for lower powered or budget applications. The power transfer is not on par with OFC, but this material offers significant savings.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



Everything you need to connect two batteries together

August 21, 2014

I was impressed with the wiring kit. This is a great product and I recommend it. Everything you need to connect two batteries together is in the box except a battery isolator... I personally used a battery isolator from Blue Sea system and the post on it are 3/8 inch so the terminal ring coming with this kit were too small... I had to change them...

The only real negative with the product is when you strip the cable, it is so pack in there the wire open up like a cauliflower which make it difficult to insert it in the fuse box or the terminal ring... Besides that, it is a great product and added a solid connection between my 2 batteries...

The other difficulty I had in my installation is the cable wasn't long enough for me... I was short by a foot... (KIA Rondo, from battery to accessory compartment in the back trunk). So I needed to order an extra 5 feet’s...

26 of 31 found this helpful

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Aurora CO

Nice WIres

July 20, 2014

The wires are really flexible for their size. Installed them and my power is a lot more stable than before. I had some older wires that needed to be replaced. I would recommend this product.

27 of 33 found this helpful

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los Angeles

Great product!

July 28, 2014

I have to say I was impressed with the wiring kit. It came with everything you need including instructions! This made installing the kit real easy, no guess work. The wires are 10% OFC and XS Power makes sure it makes up for not being 100% OFC by adding more strands. This is a great product and I highly recommend this to anyone who demands mass power distribution. These wires are truly heavy duty, but are low in weight.

24 of 29 found this helpful

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Methuen, MA

Verified Purchase
Very good worth the investment.

February 3, 2016

This secondary battery is very well worth the upgrade. I have a music system and prior to the upgrade I was drawing 5amps during idle and charging the battery. After the upgrade I was down to 1.7 amps. Yes both times the battery was evenly drawn under a load and everything was matched for both tests. Very worth the upgrade.

0 of 0 found this helpful

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Browse 1 question and 3 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Need more power to alternator for battery relocation for trunk for race car
Austin F on Jun 26, 2017
i wanted to run 1/0 gauge wire.
Derek D on May 10, 2015
Connect my amps to the battery
Chris N on Nov 23, 2016

Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: XS Power AK3000

Item Added to Cart

XS Power AK3000

1/0 Gauge XP FLEX CCA Secondary Battery Installation Wiring Kit


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