Power Distribution Box

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Updated 2025-12-08

Power Distribution Box

What is a Power Distribution Box?

Ferroamp’s Power Distribution Box is a DC distribution box (DC distribution) that is used to connect the various devices installed on the DC grid to the EnergyHub.

How is the Power Distribution Box installed?

For instructions on installing the Power Distribution Box, see the manual under Downloads.

NOTE
Only trained electricians may install Ferroamp products.

How many devices can be associated with the Power Distribution Box?

Ferroamp’s Power Distribution Box comes in 3 different models.

Power Distribution 5, Power Distribution 8, and Power Distribution 15. These products have the capacity to connect 5, 8, or 15 devices to the DC grid.

Where can a Power Distribution Box be placed?

The Power Distribution Box is IP65 rated and can therefore be placed both indoors and outdoors.

Ferroamp generally recommends that the Power Distribution Box be placed in close proximity to the components (SSOs and batteries) to be connected together in order to reduce cabling.

Can I have more DC distribution boxes in the same system?

It is possible to expand with more DC distribution boxes in the same system. We recommend connecting multiple DC distribution boxes together by putting 2 parallel cables on the incoming DC in the distribution 63A MCB and then moving on to the next distribution box.

It is important to dimension the cabling between the EnergyHub and the first distribution box so that the cable has the ability to handle all devices that are connected.

In larger systems with multiple distribution boxes, a central DC distribution box is recommended where the EnegyHub and Power Distribution box or PowerCase are connected. This product is something the installer can build themselves or order from Provektor:

https://provektor.se/uploads/2025/01/DC-fordelningsskap-A4_2025_Rev-1.pdf

How do I choose the right DC distribution box for my system?

The limitations you have to deal with are:

The number of fuse pairs in the DC deployment
Number of rows
Size of fuses in fuse pairs (15 A included, can be extended to a maximum of 32 A)
The maximum power of the components connected on a row must not exceed a power equivalent to a current above 63 A.

For example:

Here are some examples to show you how to think when choosing a DC deployment.

Example 1: Facility with 4 SSOs

We will connect 4 components and therefore need to use 4 fuse pairs in our DC distribution.
The maximum current output from the SSO is 12.5 A so we can use the 15 A fuses that are pre-mounted in the DC distribution
4 SSOs times 12.5 A gives us a maximum current per line of 50 A so we are below 63 A per row
Based on this, we can choose a DC distribution 5

Example 2: Facility with 6 SSOs and 2 Pylontech Force H3 with 2 ESOs.

In this case, we will connect 8 components and therefore need to use 8 fuse pairs in our DC distribution.
The maximum current output from the SSO is 12.5 A so we can use the 15 A fuses that are pre-mounted in the DC distribution. The maximum current output from the Pylontech Force H3 battery with 2 ESOs is 20A so we need to replace the 15A fuses in the DC distribution to 20A in this case.
63 A divided by 12.5 A becomes 5.04 and we can therefore connect a maximum of 5 SSOs per row to stay below 63 A.
We can then choose DC Distribution 8 which has 4 fuse pairs per line.
If we connect 3 SSOs and a battery to each fuse row, this gives us a total current that corresponds to: 12.5 + 12.5 + 12.5 + 20=57.5A which is below 63A.

Example 3: Plant with 8 SSOs and 1 Ferroamp V2X

In this case, we need to connect 9 components and therefore need to use 9 fuse pairs in our DC distribution.
The maximum current output from the SSO is 12.5 A so we can use the 15 A fuses that are pre-mounted in the DC distribution. The maximum current output from Ferroamp V2X is 27A so in this case we will need to replace the 15 A fuses that are pre-mounted in the DC distribution with 32 A fuses.
Due to the fact that the maximum current from the Ferroamp V2X is 27 A, we can only connect 2 additional SSOs on the same line to stay below 63 A (27 A + 12.5 A + 12.5 A = 52 A).
This means that we will need a DC distribution 15 where we have access to 3 lines and thus can keep the maximum current per line below 63 A.

What type of fuses are used in the DC Distribution?

Ferroamp’s DC distributions are equipped with 15A, 1000V, gPV fuses. These can be replaced with 20 or 32 A, 1000V gPV fuses. The dimensions of the fuses are 10×38 mm.

The fuses are available from wholesalers:

Fuses:

15A 1000 VDC (CE01293)

The circuit breaker located in the DC distribution box is: DC Circuit Breaker 63A 1000 VDC (CE01103)