Victron Lynx PowerIn – Used as a Battery BusBar

I’ve written about Victron’s Lynx PowerIn before…and how really cool I think it is. Today I am showing you how I used it for a busbar to connect three 105ah LifePO4 Trophy batteries into a solar system.

First off, remember that the PowerIn has a 1000amp busbar built in to the unit itself.

And it already has 13 connection points already for you to use:

  • 8 connection points for 4 sets of heavy duty cable/wire (4 positive & 4 negative),
  • 1 connection point for an additional connection to the negative side of the busbar,
  • 4 connection points to connect additional Lynx units to the PowerIn or other system components.

In this system that I put together I used:

  • 6 connection points for 3 sets of 2/0 cable/wire (3 positive & 3 negative) connecting each Trophy battery to the busbar in parallel,
  • 2 connection points (1 positive & 1 negative) connecting the negative end of the busbar directly to the inverter, the positive end to the 300amp Class T fuse.

Note: As per battery manufacturer I am not connecting a ground wire from the PowerIn busbar to earth ground.

You connect the negative wire first on the negative busbar, then flip down the plastic piece that keeps the wire separated and protected.

Then you install the positive wire.

Close it up and you are ready to go.

I used 2/0 cable connecting the each battery to the PowerIn’s busbar for 3 reasons; 1) Trophy battery manufacturer recommendation, 2) inverter manufacturer recommends 1/0 cable but 1/0 cable is not a standard size for solar system wiring and I like to up-size cable/wire anyways, 3) based on 50aAC output that means roughly 150aDC max draw, sizing calculator says 4AWG but leaves no leeway for over-current protection, Since my Class T fuse provides 300amp over-current protection that means it can safely protect 1/0 cable, so I once again up-size to 2/0. Yes, I am allowing for over-current protection on any one battery cable vs 3…it is my margin of safety.

From the PowerIn to the inverter I use 4/0 cable. That is standard practice when running cable from a battery busbar to the inverter. Yes, I could have used 2/0 again, but why? Using 4/0 allows for battery bank expansion and truly adds that margin of safety when dealing with the potential of very high over-current in the event of a problem.

So there you have it…using a Victron PowerIn as a busbar! A very nice, neat, safe, and professional install. Yes, I could have used 2 conventional busbars, but why?

In the article “Victron Energy Lynx Distribution System – Lynx PowerIn Part #1” I did the math comparison of the costs…$221 (individual components) vs $156 (Victron PowerIn)…and with individual components I would have not had the quality of busbar, 600a vs 1000a, and I would not have had as many connection points, and not have had the expandable capability of the PowerIn. So do it any way you wish…but Victron’s PowerIn is the Tier 1 professional method.

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