Techo fotovoltaico - energía verde

12 November, 2021

Cables for photovoltaic installations

Solar cables are key in a photovoltaic installation, whether in large installations on solar farms or in smaller installations in domestic self consumption solar systems.

High performance cables designed for solar installations

In large solar farms, sun energy is directly transformed into electrical energy. These cables are suitable for use at high temperatures and all kinds of weather conditions. Since the cable volume in these installations is quite high, it is essential to use the appropriate cables with the maximum performance, and make sure they comply with the new 1500V EN 50618 standard.

Solar cables from panel to stringbox

TOPSOLAR PV cable H1Z2Z2-K 1.5/1.5 (1.8) kV DC has been specifically designed to withstand the most demanding conditions between the panels and the LV DC network of a solar installation.

The H1Z2Z2-K TOPSOLAR PV cable, designed according to EN 50618 and IEC 62930 standards, consists of a tinned copper conductor (required by standards), a halogen-free insulation (LSHF) and a low-smoke rubber sheath. These are its most representative features:

Rayos ultravioletaUV-resistant
CPRLow-smoke halogen-free cables (CPR European Construction Products Regulation: Cca -s1b, d2, a1)
TÜV certificate
TemperaturaTheir admissible intensity is higher, with the same cross-section, than conventional cables, allowing conductor temperatures of up to 120ºC
30 añosI30 years lifespan at 90ºC
Its extraordinary flexibility and reduced diameter eases installation
móbilesSolar cables are best for mobile service. The use of solar trackers is frequent to make the most of solar radiation. In these cases, the connection cables between the mobile structures and the fixed parts are subject to movement, making conventional cables unsuitable
CompatiblesSolar cables are compatible with most renowned connectors
SumergibleThey can be installed permanently immersed in water (AD8)

Medium voltage cables for solar installations:  

Medium voltage and aluminium cables go from the transformer to the electrical distribution network. Top Cable can offer a wide range of Medium Voltage cables for solar farms, certified by the main electricity companies:


In both cases, MV cables can include sealing elements in the screen, which prevent the longitudinal propagation of moisture in the event of outer sheath perforation and/or elements for the longitudinal sealing of the conductor.

Aluminium cables for solar installations:

Planning and designing a PV Plant

Planning and designing a PV Plant



Auxiliary cables for solar farms:

Top Cable also has a wide range of cables for auxiliary installations in solar farms, such as:

Solar cables for domestic self-consumption installations

TOPSOLAR PV H1Z2Z2-K 1.5/1.5 (1.8) kV DC cable -that we saw at the beginning of this article- is, without doubt, the most suitable cable for a domestic photovoltaic installation:


Considerations when choosing a photovoltaic wire cable

Electrical wiring is one of the photovoltaic installations key points. The correct cable selection will optimize the performance of the solar garden in the short, medium and long term. 

Demanding conditions that a photovoltaic solar installation must withstand

The connection cable that connects the panels and the DC Low Voltage network in a photovoltaic solar installation has to withstand the most demanding conditions:

The cable TOPSOLAR PV H1Z2Z2-K has been specifically designed for the connection of panels in solar farms, so it has all the features mentioned above.

Good dielectric strength, low loss factor, and high insulation resistance

As for the cables for Medium Voltage network in a photovoltaic installation. Whether the cable is XLPE (insulated with cross-linked polyethene) or HEPR (ethylene propylene). It is very convenient that its external semiconductor layer is separable. Given that its easy extraction is a critical factor when it comes to correctly prepare the tips of the cable for the splice manufacture or terminals. Also constituting a significant saving of time for the installer.

Medium voltage cables with XLPE insulation are characterized by good dielectric strength, low loss factor, and high insulation resistance.

Medium voltage cables insulated with HEPR rubber can withstand continuous operating temperatures up to 105 ° C. These also present very good resistance to thermal ageing and partial discharges.

In both cases, the cables can include sealing elements on the screen. These prevent longitudinal humidity propagation. In case of perforation of the cover and/or the elements for the longitudinal sealing of the conductor.

TOP CABLE, a complete supplier for solar electrical installations

Top Cable is an integral manufacturer and supplier of solar cables in photovoltaic plants of any size anywhere in the world.

Has a wide range of solar wiring. Do not hesitate to consult our catalogue and find any cable you need:

Download the Top Cable Solar catalogue here.

cable en 50618

If you are also interested in other types of cable, you can consult our complete catalogue here.