Balance of System

Cables, connectors, and protection boxes.

Balance of System: sourcing overview

Balance of System (BOS) accessories are the small but essential parts that connect, protect and complete a PV installation once the panels, inverter and mounting are in place. This family covers PV cable, MC4-compatible connectors, fuse and diode connectors, junction and combiner enclosures, grounding hardware and the miscellaneous fittings that a project bill of materials almost always leaves until last.

For overseas EPC and distributor sourcing, BOS accessories are best ordered against a complete BOM rather than line by line. A single connector or cable item rarely meets a factory minimum on its own, but combined across cable, connectors, protection and grounding the order reaches a workable quantity and ships in one consolidated container. OmniSol reviews each line for voltage and current rating, certificate availability (IEC 62852, EN 50618, TÜV or UL where required) and compatibility with the cable and connector system already specified, then confirms packing and labelling before shipment.

Because these parts have a high failure cost relative to their unit price, the RFQ should define cable cross-section, connector type, IP rating and the destination market standard up front. Send the project specification and OmniSol returns a quote-ready BOS accessory BOM with matched SKUs, certificate notes and consolidated freight options.

What to confirm before requesting a Balance of System quote

A complete specification lets OmniSol match the right SKU, check certificate availability, and plan consolidated packing in one pass.

Specification fieldWhat to provide
Specification / ratingExact model, rating class or spec required for balance of system
QuantityProject quantity, container target, or expected annual volume
DestinationCountry and port — for freight, duty and compliance review
Standards / certificatesIEC, EN, UL, TÜV or market-specific documents required
Related BOSOther categories to consolidate into the same shipment
Delivery targetRequired delivery window or project milestone date
Send this specification

Consolidate Balance of System with the rest of your BOS

Balance of System ships in one container together with mounting, cables, protection and storage — one QC report, one document set, one shipment.

Balance of System sourcing questions

What information is needed to quote Balance of System?+

Buyers should provide target specification, quantity or project size, destination country or port, required standards, and delivery schedule. Photos, drawings, or previous supplier datasheets help speed up SKU matching.

Can OmniSol match Balance of System with related BOS items?+

Yes. OmniSol can review related mounting hardware, PV cables, connectors, DC protection, combiner boxes, distribution boards, and packing requirements for combined procurement.

How are documentation and packing requirements handled?+

Documentation, label, carton, pallet, and inspection requirements are confirmed during RFQ and before shipment according to the selected SKU, supplier, order size, and destination market.