Solar pv project, Bracknell

Solar pv, 2 x 3Kw projects, London

Wind turbine project, Derby

Solar and wind project Glos.

Solar project, Middlesex

3 x 2.5kW roof mounted wind turbines in London

Off-grid Solar and wind energy system for Antarctic, Ebase

Off-grid Solar and wind energy system for Antarctic, Ebase

Solar PV Facade Installation, London

School Eco Centre West London

Off-Grid Solar Systems for Environment Agency

Wind & Solar Street Lighting for Thames Water

4 kW Solar PV Installation, Essex

Solar and Wind off-grid system, Norfolk

Solar and Wind off-grid system, Wales

Solar Street Light for Spitalfields

Solar Bollards for pathway lighting

Solar Street Lights for Olympic Park, London

Off-grid system for Alladale Wildlife Park, Scotland.

Off-Grid (Solar) System France

Off-Grid (Solar) System Spain

NEW: Solar Power Kits

NEW: Caravan & Motorhome Kits

NEW: Off-Grid Solar and Wind Power Kit

Tel: 019599 570 728

Check this out

(off-grid) Energy Systems designed and supplied

Click on image to see more

Solar Cable and Solar MC Connectors

We sell solar cable and solar panel connectors. Please refer to list below. If you are seeking guidance on wiring solar arrays then please refer to notes further down this page or give us a call on
0208 916 2400

Solar Cable with Pre-Installed Connectors:

We offer a very competitive customised cable and connector service and can supply any length of solar cable complete with the required connectors pre-installed to suit all your requirements. Let us know what length of cable and how many connectors you require and we'll let you know how much it costs. All cable and connectors are guaranteed to be genuine.

PV-Cable assemblies
Item Code Description Price
CAMC4500 MC-4mm2 Solar Cable (500m Drum) £1.49 per metre
CAMC4100 MC-4mm2 Solar Cable (100m Drum) £1.69 per metre
CSCSMC4 Customised Solar Cable with Pre-installed Connectors.
Cable: MC-4mm2 Solar Cable

(Any length from 1m+)

Specify your requirement
CAMCNEG MC-4mm2 Type3 Negative Connector £3.65 each
CAMCPOS MC-4mm2 Type3 Positive Connector £3.65 each
CANEGBRANCH MC-4mm2 Type3 Negative Branch Connector £9.55 each
CAPOSBRANCH MC-4mm2 Type3 Positive Branch Connector £9.55 each
CAMC6NEG MC-6mm2 Type3 Negative Connector £3.82 each
CAMC6POS MC-6mm2 Type3 Positive Connector £3.82 each
CAMCNEG4 MC-Type4 Negative Connector £3.95 each
CAMCPOS4 MC-Type4 Positive Connector £3.95 each

Solar Cable and Connectors
Type 3 4mm2 Solar Cable and Connectors Type 3 4mm2 Solar Cable Branch Plug Type 3 4mm2 Solar Cable and Connector Set
Type 3 MC Cable & Connectors Type 3 MC Branch Plug Type 3 MC Cable Sets & Connector
Solar Cable MC 4mm2 Type 3 Positive and Negative Cable Connectors Type 4 Solar Cable Connectors
MC Flex Sol Solar Cable
Available in different colours
Top: PV-Male cable coupler
Bottom: PV-Female cable coupler
Type 4 Cable & Connectors
Download the MC catalogue here
Solar Panels and Inverter Connections Soalr Panel Parallel Connections and Branch Connectors
Solar Panel and Inverter Connections Solar Panel Parallel Connections using Branch Connectors
Assembly Tools
If you want to install your own 2.5mm2 or 4mm2 connectors you will need these tools. Call for pricing.
Crimping pliers PV=CZ for cable cross section of 2.5mm2 and 4mm2
Crimping Pliers for 2mm2 and 4mm2 Solar Cable

Crimping Pliers - PV-CZ

For assembly of the cable coupler
PV-KBT3... and PV-KST3... incl. tapered spindles. Suitable for on-site use, e.g. on the roof etc.
Solar Cable and Connectors Assembly Device

Assembly device PV-RWZ3

Essential Information

Once a solar panel is exposed to light it will generate electricity. Working with electricity is dangerous and care needs to be taken. If you have any doubt about working with electricity then consult a qualified electrician.

  • Working with solar PV arrays can be extremely hazardous.
  • Solar panels produce a voltage when exposed to light.
  • Solar panels connected together in an array are often configured to produce high voltages. Panels can be connected in series or parallel.
  • Solar panels connected together in an array will always produce a voltage even if there is a fault with the panel.
  • Opening and closing any contacts while the solar array is under load will lead to arching at the contacts and these can be dangerous.
  • Fuses and circuit breakers do not operate like their AC counterparts.

Take all the precautions necessary before installation, during installation and when testing the solar array.

DC Cable Installation- General Guidelines

  • Cable should always be double insulated and polarized.
  • DC Connectors should always be used.
  • Cable or fuses should never be disconnected when under load.
  • Cable from the solar pv modules should follow the shortest route to the array combiner boxes.
  • All DC cable should be clearly identifiable
  • Cables should be laid in parallel and loops should be avoided - except where they enter a building
  • Cables should never be lain in a hazardous space.
  • Cables should never be paled near to lightning conductors.
  • Cables should always be tested for polarity in accordance with specified regulations.

DC Wiring - Modules and Strings

Care must be taken when connecting modules into strings. This applies when connecting modules together in series - the positive of one module is connected to the negative of another and so on.

All cables must be given string numbers - for ease of identification later on and when testing for faults etc.


When testing solar modules the following applies:

  • Testing for polarity - ensure that DC polarity is correct and that the positive wire core is used only for positive connections and negative wire core is used for negative connections.
  • Check that the open circuit voltage of the string equals the sum of the open circuit voltages of all modules in the string.
  • Check the short circuit current of the string against the datasheet for the appropriate module used.

Power Losses and Voltage Drop in Cables

Power losses in DC systems are due to voltage drop. Stand-alone DC systems typically operate at a lower voltage, 12V, 24V or even 48V DC.

Care must be taken when selecting the size of the cable to be used. If too small a cable is used then the voltage drop increases and in an off grid or stand alone system this can have a major impact on stand alone systems where the battery voltage is lower than expected.

Volt drop can be calculated from the formula: V = I x R, where V is the volt drop in the cable (V), I is the current in the cable (A) and R is the resistance of the cable is (ohms. Note resistance depends upon the length of the cable and cross sectional area (CSA) of the cable.

Resistances for Metric Cable

Conductor cross sectional
area (mm2)
Ohms per metre
2.5 0.0074
4 0.0046
6 0.0031
10 0.0018
16 0.0012
25 0.00073
35 0.00049

Example: for a 6mm2 cable, 100m long, carrying a current of 20A,
the voltage drop = 20A x 0.0031 = 0.062V per metre. For a cable length of 100m the volt drop = 12.4V.


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