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Trade Installation advice Embedded generation Installing an embedded generator

This guide explains the steps you, as a certified installer of Embedded Generating Unit (EmG), need to take before, during and after carrying out an installation. It covers the following topics:

Step 1 - Planning permission

Before installing any Embedded Generating Unit (EmG) for your customer, you must ensure they have obtained the necessary planning permission.

Step 2 - Complete an Electricity Supply Enquiry (ESE)

To complete an Electricity Supply Enquiry (ESE) form you will need to provide the following:

  • A site location plan
  • A ground floor drawing with all existing services and/or the proposed new services marked
  • All your proposed electrical load in kilowatts (kW)
  • All your current electrical loads in kilowatts (kW)

The ESE should be completed by a person with a good knowledge of the property's required electrical loads. If your are not confident you can accurately work out the property's required electrical load, we recommend asking an experienced electrical contractor to complete the ESE on your behalf.

The ESE form is an editable PDF. You can complete it using a computer, or print it and fill it out by hand.

Electricity Supply Enquiry

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Step 3 - Return the completed ESE to our team

By email

Please send the completed form to our ESE Team by email to ese@jec.co.uk.

By post / by hand

ESE Team
Jersey Electricity
The Powerhouse
Queens Road
St Helier JE4 8NY

By hand only

La Collette Power Station Reception.

Step 4 - We confirm receipt of your application

Once we've received your completed ESE form, we will send you written confirmation and begin processing your application.

Step 5 - Submit an Embedded Generation form

At Jersey Electricity we refer to all solar and wind systems that create renewable energy as Embedded Generation.

To ensure the installation of your system meets our guidelines, you will need to complete the correct Embedded Generation form on behalf of your customer.

To find the correct form and guidelines download our Embedded Generation Form decision tree.

The correct Embedded Generation forms must be completed BEFORE work on installing your system begins.

All our Embedded Generation forms can be downloaded from the Embedded Generation page.

Download Embedded Generator Decision Tree View all forms

Step 6 - Carry out the installation

Once you have received our approval, you can begin installing the embedded generation system. To make sure it meets our requirements, you will need to closely follow the engineering recommendations that suit your installation.

Installation of any generator less than or equal to 16A per phase must comply with Engineering Recommendations G98 'Requirements for the connection of Fully Type Tested Micro-generators (up to and including 16 A per phase) in parallel with public Low Voltage Distribution Networks'.

Installation of any generator greater than 16A per phase must comply with Engineering Recommendations G99 'Requirements for the connection of generation equipment in parallel with public distribution networks.

Step 7 - Installation inspection by our engineer

Once you have carried out your installation, we will send an engineer to inspect it and make sure it meets our requirements.

If the installation meets our requirements, we fully commission the embedded generation system and provide written confirmation.

Step 8 - Fitting a buy back meter

A Buy Back meter allows you to sell surplus electricity back to us at the Buy Back tariff rate.

Once your installation has been approved by our engineers, and assuming there is sufficient space, we can fit a Buy Back meter beside your existing outdoor meter at no cost.

If your existing meter is indoors, we will have to move it outside and our Planning Engineer will advise you of the costs.

Your Customer Number

Your 5 character Customer Number can be found in the top right and bottom left corners of your bill.

Example electricity bill with the customer number highlighted

Daily Service Charge

The Daily Service Charge covers energy support services such as metering, billing, Customer Care, safety obligations and other energy support services.

Off-peak

Off-peak means not at the most popular time. Some of our tariffs provide discounted rates at off-peak times - for example, during certain periods at night.

Off peak charging times

Our current off peak electric vehicles times are from 00:00 to 06:59.

Dedicated supply circuit

A dedicated supply circuit is an electrical circuit that is set aside for a specific purpose, such as powering a boiler. It will work with a single appliance only.

It will have its own circuit breaker in your fuse box, and no other device or appliance will be able to draw power from it. A dedicated supply circuit ensures that appliances can draw the current they need without overloading your system, blowing a fuse or tripping an electric circuit.

Invoice Number

This can be found on the top right corner of your bill here

Example electricity bill with invoice number

Premise Number

This can be found on the top right corner and bottom left corner of your bill.

Example electricity bill with premise number highlighted

Payment Slip

This can be found at the bottom of your bill here

Bill payment slip example

Peak Load

Peak load or peak demand is a short period when the demand for electricity is at its highest.

Kilowatt Hours

Electricity consumption is usually measured in kilowatt hours, or kWh for short. Each kWh of electricity equates to 'one unit of electricity' for billing purposes. A 1kW (1,000 Watts) appliance in use for one hour = 1kWh (one unit). The cost per unit used depends on which tariff you are on.

Three phase

Residential homes are usually served by a single-phase power supply, while commercial and industrial facilities usually use a three-phase supply.

One difference between single-phase and three-phase is that a three-phase power supply better accommodates higher loads. Single-phase power supplies are most commonly used when typical loads are lighting or heating, rather than large electric motors.

Another important difference between 3-phase power and single phase power is the consistency of power delivery. Because of the variations in voltage, single-phase power supply does not offer the same consistency as a three-phase power supply. A three-phase power supply delivers power at a steady, constant rate.

kVA

A kVA is simply 1,000 volt-amps. A volt-amp, or ampere, (VA) is the voltage times the current feeding an electrical load.

Embedded generator

Embedded generators like wind turbines and solar panels are connected to your electricity supply and provide electricity for onsite use. They also have the capability to export back to the grid.

Smart Card Number

Your Smart Card Number is the 19-digit number displayed below the barcode on your Smart Card.

The Smart Card Number also contains your six-digit Meter Number that is also displayed on your meter. You need this to top up a Smart Pay As You Go Meter whether at a Payzone outlet or online.

Example of Smart card for meter charging

Smart Card

A Smart Card contains your unique Smart Card Number used when topping up a Smart Pay As You Go Meter.

Example of a smart card for meter charging

F-Credit

F-credit is a Pay As You Go meter display and means Friendly Credit. It is the period between 9pm and 8am. If the credit on your meter runs out during this period, your supply will remain on until 8am.

Decarbonise

The process of reducing carbon by replacing fossil fuels with fuel that is less harmful to the environment such as low-carbon electricity.

Regenerative braking

With conventional braking systems, the kinetic energy that was propelling the vehicle forward gets converted to unwanted and wasted heat by the friction of the brakes.

Regenerative braking recaptures much of the car's kinetic energy and converts it into electricity, so that it can be used to recharge the car's batteries.

In addition to improving the efficiency of a vehicle, regeneration can significantly extend the life of the braking system, as the mechanical parts will not wear out as quickly.

Power factor

Power factor is the ratio of useful power in kilowatts (kW) to apparent power, measured in kilovolt amperes (kVA). A perfect power factor would be 1.0, however in reality this is almost impossible to achieve. Office buildings are usually between 0.98 and 0.92. Bad power factor is anything below 0.85.

Electric flow boiler

Electric flow boilers are simple to install, quiet in operation, 100% efficient and integrate into most existing radiator or underfloor piped systems. Plus, with no flue or storage tank, an electric boiler is a space-saving option that can be installed almost anywhere in your home.

Approved heating system

A heating system, approved by Jersey Electricity, on a dedicated supply for use on one of our discounted heating tariffs.

To learn more about what's required for an approved heating system, view our current approved heating guidelines.

20-digit payment code

The 20-digit payment code is issued with your receipt for a Pay As You Go (PAYG) meter top-up. If your meter did not charge automatically, you can do it manually with the payment code. Press button A on your meter then key in your 20-digit payment confirmation code on the meter keypad, then press button B. Your meter will recognise the amount paid and charge accordingly.

Single phase

Single-phase power supplies are most commonly used when typical loads are lighting or heating, as in a domestic home, rather than large electric motors and higher loads. Single-phase power is a two-wire alternating current (AC) power circuit.