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Balance of System

Solar balance of system for UAE and GCC projects: cables, switchgear and SCADA

The cables, transformers, switchgear, combiner boxes and monitoring that connect modules and batteries to the grid, specified to IEC standards and rated for GCC heat, UV and dust.

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DC cable rating
1.5 kV DC
MV class
11–33 kV
Monitoring
IEC 61724-1
Neatly wired combiner box and switchgear with color-coded DC cabling

What we supply

Balance of System product groups

Wholesale supply in project and container volumes. Tell us your specification and we source to it.

DC and AC solar cables

PV string cable, AC power cable and accessories for rooftop and utility plants.

  • PV cables to EN 50618 / IEC 62930, rated for 1.5 kV DC systems
  • UV-, ozone- and heat-resistant, halogen-free sheaths
  • Tinned copper conductors, with aluminium options for long AC runs
  • Armoured LV and MV power cables for direct burial
  • Compatible connectors and branch fittings, tested as mated pairs
Quote this: DC and AC solar cables

Transformers

Step-up and distribution transformers for PV plants, BESS and large C&I sites.

  • Oil-immersed and cast-resin types designed to IEC 60076
  • Inverter-duty designs for harmonic-rich PV and battery loads
  • Compact and skid-mounted substations
  • Ratings and cooling classes chosen for high ambient temperatures
Quote this: Transformers

MV/LV switchgear

Medium- and low-voltage switchgear for plant collection, protection and grid interface.

  • MV ring main units and switchgear to IEC 62271 for 11–33 kV networks
  • LV switchboards and assemblies to IEC 61439
  • Protection relays with grid-code interface protection functions
  • Internal-arc classified enclosures for operator safety
Quote this: MV/LV switchgear

Combiner boxes

DC string combiners and AC combiner panels for string-level protection.

  • gPV string fuses to IEC 60269-6 and DC isolators
  • Type 1+2 or Type 2 PV surge protection to IEC 61643-31
  • IP65-rated enclosures with UV-stable, vented housings
  • Optional string-current monitoring
Quote this: Combiner boxes

Monitoring, SCADA and weather stations

Performance monitoring and plant control from single rooftops to utility sites.

  • Weather stations with pyranometers to ISO 9060, and ambient and module temperature sensors
  • Soiling measurement stations to quantify cleaning needs
  • Monitoring designed to IEC 61724-1 accuracy classes
  • SCADA and power plant controllers over Modbus TCP and IEC 61850
Quote this: Monitoring, SCADA and weather stations

Applications

Where it is used

01

Utility PV plants

Large plants depend on long cable runs, collection switchgear and step-up transformers. Balance-of-system choices set a large share of losses and long-term reliability. We can supply matched packages to the EPC’s single-line diagram and cable schedule, with manufacturer type-test certificates available on request for owner’s engineer and utility review.

02

Battery storage integration

BESS projects need transformers and switchgear sized for bidirectional power flow, plus protection that covers both charging and discharging. Inverter-duty transformers handle PCS harmonics. The SCADA or energy management system coordinates the battery, the PV and the grid connection point.

03

C&I rooftop upgrades

Commercial rooftop systems connect to existing LV boards, so the switchboard, protection and cabling must match what is already installed. Combiner boxes with surge protection shield inverters from lightning-induced surges. Monitoring gives facility managers live yield data and alerts on string faults.

04

Performance monitoring and O&M

Accurate irradiance and soiling data separate genuine faults from dust or weather. A weather station with calibrated pyranometers lets you calculate performance ratio correctly and time cleaning cycles. SCADA data also supports warranty claims and lender reporting over the plant’s lifetime.

Why Synapse Horizon

Supplied by us, delivered with our partners

Tier-1 sourcing

Cables, transformers and switchgear sourced from established manufacturers and authorised channels, with the manufacturer warranty applying.

Documentation and certification support

Manufacturer IEC type-test reports, routine test certificates and datasheets available on request for utility and consultant approval.

Logistics coordinated from Dubai

Shipments can be consolidated in Dubai and delivered by road or sea across the UAE, Saudi Arabia, Oman, Qatar, Kuwait and Bahrain, and onward to wider MENA.

Partner engineering and installation

Our engineering, EPC and installation partners handle design, utility submissions, installation and commissioning, so you get one accountable path from quote to energisation.

FAQ

Balance of System questions

Why does solar need special DC cable?
PV string cables carry direct current at up to 1.5 kV and sit in full sun for decades. Cables to EN 50618 or IEC 62930 are designed for that duty. They resist UV, ozone and high conductor temperatures, and they are double insulated. Standard building wire is not rated for this and will degrade faster.
What should I check on a transformer for PV or BESS?
Confirm the rating at your site’s ambient temperature, the vector group and tap range required by the utility, and suitability for inverter harmonics. For BESS, confirm it handles reverse power flow. Ask for type-test reports to IEC 60076, and check that the cooling class works in 50 °C summers.
Do combiner boxes need surge protection?
In most cases, yes. Long DC cable runs pick up surges from nearby lightning, and surge protective devices to IEC 61643-31 protect inverters and modules. The need and type depend on the lightning risk assessment and the cable lengths. Your designer should confirm this, and the combiner box can then include the appropriate SPDs.
What monitoring level does a plant need?
IEC 61724-1 defines monitoring classes. Class A, with high-accuracy sensors, suits utility plants and lender reporting, while simpler classes suit smaller rooftops. At minimum, measure plane-of-array irradiance, module temperature and inverter output. In dusty regions, a soiling station helps you plan cleaning based on measured losses.

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