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Elektro internationaal dc grid 05

benefits of the
DC microgrid

10 good reasons for an Ei•dcgrid

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Up to 50% reduction in grid connection

By connecting a weather station to the AFE (Active Front End), the Ei•dcgrid will determine in what status the system should operate based on the weather forecast. Think of storing solar energy during the day in the batteries or charging the batteries at night at off-peak rates. During peak hours in the day, your installation will be partly powered from the batteries. By calculating the correct capacity of the batteries, your power consumption from your grid connection can be reduced by up to 50%.

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10% to 15% energy savings

70% of our used energy is converted from AC to DC in traditional installations. This conversion results in heat generation, leading to significant energy loss. Additionally, renewables such as solar panels generate DC, and storage in batteries also occurs in DC. The DC grid operates entirely on DC, eliminating all AC/DC conversions (and the resulting loss).

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Solution for grid congestion

In areas where there is grid congestion, the DC microgrid is a good solution. Because there is a galvanic isolation between the AC grid and the DC grid, the grid operator no longer has control over energy sources such as PV and batteries. Behind the AFE (Active Front End), you can determine the desired capacity of the energy sources yourself. The AFE regulates the power that may be fed back. Additionally, it is possible to install multiple AFEs to extract more power from or feed power back into the grid.

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Easy to integrate

The unique AFE (Active Front End) is the bidirectional Interlink inverter that provides galvanic isolation between AC and DC. The AFE is adjustable to determine feedback to the AC grid. This means that presumably no capacity upgrade of your current installation is necessary. Additionally, it is possible to place the DC microgrid in a container so that the entire installation is located outside the building. The daily operations will experience little disruption from the implementation of the Ei•dcgrid.

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Very easy to expand

There are several reasons why the DC microgrid is easy to expand. The main reason is that the entire installation can be placed outdoors. This makes it easy to connect a future expansion without much installation work. The AFEs can be easily connected in parallel. In addition, the DC installation uses Solid State protection called Current Routers (CRN). These CRNs ensure that in case of a short circuit, the protection responds within 8µs, preventing the short-circuit current from exceeding 600 Amps. This makes it possible to expand the number of power sources in the future without restrictions due to increasing short-circuit power (as is the case in an AC installation). Because the DC grid can be inserted at different locations, it is also easy to connect future power sources and consumers (PV, BESS) to the existing grid without the need for a capacity upgrade.

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Save 35% on copper

Direct current can be inserted at multiple points in the DC installation. This has the advantage that much less wiring (thus copper) needs to be used. This saving can amount to 35%. Less use of copper and other raw materials also reduces the CO2 footprint.

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Reduction of installation time

Because much less and thinner cabling needs to be installed in the DC microgrid, this results in a significant saving in installation time. Depending on the size of the installation, this can lead to a time saving of 50%. Given the current shortage of electrical technicians, this is a very big advantage for installation companies.

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No expensive software needed

Unlike an AC microgrid, a DC microgrid operates without complicated software. The DC grid controls voltage levels, known as droops. The nominal voltage levels for this system are set at 700Vdc/350Vdc. Voltage limits are specified within these voltage levels. The droop settings are determined and transmitted to all loads via the AFE (Active Front End). Based on these settings, the entire system will be self-regulating. The droop settings can be linked to a weather forecast.

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Smart charging

The DC microgrid is adjustable to your liking. This means that energy procurement and sales can be managed intelligently. If the weather forecasts are poor, the BESS can be charged at off-peak rates, allowing processes to be powered during peak hours. If the weather forecasts are good (lots of sun), the BESS can be charged to have sufficient capacity for when there is insufficient power generated from PV. Of course, it is also possible to trade with the energy.

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Availability of an emergency power source

Because the Ei•dcgrid can operate autonomously from the traditional grid, it is possible to use the installation as an emergency power supply. Capacity from the batteries can be used to temporarily power the primary processes within a building.

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Want to learn more about the possibilities of your own DC microgrid?

LOGO Ei dcgrid diap

Reliable and sustainable direct current microgrid solutions for a changing energy landscape.

Ei•dcgrid is Current/OS compliant

The DC microgrid of Elektro Internationaal follows the open protocol for direct current applications.

Ei•dcgrid is powered by

Elektro Internationaal B.V.
Pompmolenlaan 17
3447 GK  Woerden
The Netherlands

+31 348 420540

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