Flexible Busbars for Solar Inverters

Press-welded flexible busbars for central and string inverters. Rated for 1500 V DC and designed for the thermal cycling and vibration of continuous operation in utility-scale and commercial installations.

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Why Flexible Busbars in Solar Inverters?

Central inverters in the megawatt range and string inverters in the kilowatt range carry high DC and AC currents between capacitor banks, IGBT/SiC modules, DC links and output terminals.

In operation, these connection points heat up and cool down again with every passing cloud and every day-night cycle. Rigid connections cannot absorb this thermal cycling and cause contact problems over their service life.

Flexible busbars absorb these stresses. Low contact resistance keeps joint temperatures and I²R losses down, directly protecting the efficiency and service life of the inverter.

The flat design brings further advantages in inverters: compared with cables, it has lower inductance, which reduces voltage spikes at the semiconductors at IGBT and SiC switching frequencies. It also offers more surface area for heat dissipation.

Every flexible busbar is manufactured to customer drawing and tailored to the specific installation conditions of the inverter.

Applications

  • Capacitor bank connections

  • DC link connections

  • IGBT/SiC module terminals

  • Output terminal connections

  • String and central inverters

  • Utility-scale & commercial installations (C&I)

Technical Data

Parameter

Specification

Rated current

100 A – 10,000 A

Voltage

Up to 1,500 V DC

Conductor material

High-conductivity copper (purity ≥ 99.9%), e.g. Cu-ETP, Cu-HCP or Cu-OF (OFC), as required

Lamination thickness

0.1 – 0.5 mm

Cross-section

10 mm² – 4,000 mm²

Terminals

Press-welded, solid; undrilled or with holes to DIN 43673 or customer drawing

Surface

Tin-plated, nickel-plated or silver-plated

Insulation

Optional, e.g. polyolefin, PVC, silicone, polyimide (Kapton®), PET or aramid (Nomex®)

Operating temperature

Depending on insulation material

Busbars for Your Inverter

Send us your drawing or your requirements for current, voltage and installation space. We manufacture flexible busbars for inverter manufacturers and solar system integrators worldwide.

Inquire now

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Kai Kleinevoß Portrait Head of Sales Wirbalit® SVS Schweißtechnik

Kai Kleinevoß

Head of Sales Wirbalit®
kleinevoss@svs-schweisstechnik.de
+49 208 99 328 15