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Neptune Apex EB4 Energy Bar


Item #: NS3393

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The EnergyBar 4 module features 4 independently controllable outlets. With power failure detection, active electrical current monitoring, and failsafe features make this power bar far better than any competing units.
  • 4 independently controllable 120V Outlets (3 outlets @ 8 Amps, 1outlet @ 12 Amps, total current must be less than 15 Amps)
  • Plug and Play
  • Built-in 4 Port hub so that accessories can be easily added
  • Active electrical current monitoring and logging
  • Fail-safe features. On communication failures outlets revert to user settable default settings
  • High reliability direct wired connection to the Apex System (does not use X10)
  • All four of the outlets use mechanical relays for switching
  • Up to 240 EB4s can be daisy chained together for up to 960 switched outlets
  • Built-in circuit breaker Protected
  • 4 Mounting Holes for easy installation
  • Compact custom aluminum enclosure (7.5" x 3.75" x 1.8")

When you connect Apex Ready certified products to your Apex System, many new options will unfold. How about having your LED lights dim or change color temperature at the touch of your iPad? How about programming your Tunze or VorTech pumps for some serious wave action? That’s what you get when you pair up the Apex System and an Apex Ready certified product.

Manufacturer information

Neptune Systems Aquarium Supplies
Neptune Systems is one of the world’s leading manufacturers of aquarium controllers. The company was founded in 1995 for the purpose of developing affordable water quality monitoring and control instrumentation. Their engineering team has extensive expertise in computer hardware and software system design as well as a background in water quality analysis. Neptune Systems uses these finely-honed engineering skills to develop innovative monitoring and control solutions for use in reef and fresh water aquariums, aquaculture tanks, hydroponics systems and general laboratory use. Neptune Systems is best known for their AquaController line. The company is known for their innovation and customer centricity.

5 Stars


Reviewed on
October 29, 2019

Yes, I would recommend this.

Neptune Expansion Outlet

Pros: It also ads expansion for the apex system as well. 4 extra usb ports. More Neptune equipment means more control over the system

Cons: Adding the expansion means, you have to resist the temptation to buy more awesome Neptune products to control your system.

It's awesome, because its made by Neptune!!!

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Reviewed on
March 29, 2019

Yes, I would recommend this.

Power bar

Pros: Easy to install

Cons: Price

Performs as expected

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Reviewed on
February 11, 2018

Yes, I would recommend this.

Nice addition, even for an Apex 2016

This unit is all mechanical relay switches, no flakey triac switches like with the EB8. It also has 1 of the 4 outlets rated for 12 amps, which is the highest power rating for a single outlet on any Neptune energy bar (the current EB832 outlets are only rated for 7A each). This can be extremely useful if you run a chiller, for example. Of course you still have to be mindful of the total amperage on each circuit, typically a 15 or 20 amp limit.

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Reviewed on
February 05, 2018

Yes, I would recommend this.


if you need more outlets this is a good choice.

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Reviewed on
May 01, 2017

Yes, I would recommend this.


I got this to with my apex's jr.It's great to have control over what each plug can do. A nice product to have.

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Reviewed on
April 20, 2017

Yes, I would recommend this.

Apex Energy bar

Pros: Well build

Cons: None

This is a great addition to my two other energy 8 bars . And as always coming from marine depot .At great prices and fast shipping

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Reviewed on
January 31, 2017

Yes, I would recommend this.

Great addition to my Apex Jr

Pros: Easy to integrate, great control

Cons: None

Adding this to control more outlets on my Apex Jr. Easy to integrate and program.

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adam yaws

Reviewed on
September 01, 2015

Yes, I would recommend this.

Neptune = Perfect

This EB4 is running the gear attached to my DT. I have a basement fish room with an EB8 for control down there. The EB4 is controlling off/on for my AI Hydras (Mostly emergency off if necessary) and on/off for my Gyre for feeding. I still have a ginormous 300W Eheim Jager in my overflow providing heat which is also running on my EB4. The APEX is controlling the temp by cycling the heater. (I don't trust heater thermostats.) Another very solid Neptune product.

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dan f

Reviewed on
August 28, 2013

Yes, I would recommend this.


Best module for running low wattage dosing pumps. It turns the outlet on or off reliably as programmed unlike the triac switch outlets on the EB8 which needs a higher wattage device plugged in. The apex may say the EB8 triac switch outlet is off but the outlet is still providing power causing the dosing pump to continue pumping. The switch actuation on the EB4 is silent which surprised me. No loud clicking like on the EB8's mechanical switches (outlet 4&8). This module is pricey but its worth it for piece-of-mind that my pumps will turn off according to my programmed settings.

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Reviewed on
July 28, 2012

Yes, I would recommend this.

just what I needed

It's a bit pricey, but it's exactly what I needed alongside the Apex Jr. Works great.

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