A mated pair of MC4 solar connectors on black PV cable in the foreground, with a rooftop solar array under a clear sky behind
  • MC4-compatible
  • MC4-Evo2
  • Y-branch
  • H1Z2Z2-K cable

MC4 Solar Connectors and H1Z2Z2-K Cable

For string, inverter and junction-box DC wiring — certified to IEC 62109-1, UL 1741 and TÜV 2PfG.

// Residential · C&I · Utility

Three array types

Each array type takes a different pairing.

// EU · UK · US · DE

Certification by market

Each of the five lines carries its own type approval, and the schemes differ by destination: IEC 62109-1 and EN 50618 for the European Union, TÜV Rheinland 2PfG for Germany, UL 1741 for the United States. A line certified in one market is not automatically certified in the next. Testing is kept in-house rather than bought in — of the 180 people on site, 24 work in quality control — and certificate numbers with their expiry dates are attached to every quotation, with the full per-model pack on the certifications page.

European Union5 / 5product lines certified
IEC 62109-1 · EN 50618
Germany4 / 5product lines certified
TÜV Rheinland 2PfG 1169 · 2419 · 2642
United States3 / 5product lines certified
UL 1741
Connector samples under a pull tester in the in-house test roomBlack MC4 connectors racked inside an open salt-mist corrosion chamberMC4 connectors submerged on a jig in a water immersion tank for ingress testing
Pull, salt-mist and immersion rigs on site — 24 of the 180 people here work in quality control.

// Pairing

What each connector pairs with

The three combinations distributors ask about most.

Check the full compatibility list
KS-AC4E24–10 mm² solar cable · any MC4-Evo2 string

30 A continuous · derate above 70 °C

KS-BR42× KS-AC4 parallel strings

Balance current ≤ 30 A per branch

KS-PV4KS-AC4 / KS-AC4E2 terminals + standard MC4

1.5 kV DC · XLPE, 4/6/10 mm²

Solar string connector being fitted to a junction box in the field
A KS-AC4E2 landing into a 4-input box — the pairing above as it arrives on site.
Kesterline connector production line
Contacts are crimped and pull-tested on the same line, so a failed batch never reaches packing.

// In-house plant · since 2014

Our plant and output

Every contact batch is pull-tested; a sample is salt-mist checked per IEC 61701.

12 000 m²
plant area
24 QC
dedicated inspectors
2014
founded
8M+
connectors per year
82%
export share
20–35 days
lead time

// Distributor terms

Ordering and lead time

Find your regional desk
1 000 pcs
MOQ, connectors

2 000 m cable · 500 pcs junction boxes

5–7 days
Sample lead time

Terminated samples to your cable spec

20–35 days
Production lead time

From approved drawing to shipment

ODM
OEM / private label

Contact plating · housing colour · packaging · harnesses

Request a Quote

24 hResponse, one working day

Tell us the SKU, quantity and market. Manuals and certificate packs come with the quote.