NB This information is subject to change due to legislation and prices.

You must have:

•Your electricity supply with the company to which you wish to sell back electricity (in most cases).
•A renewable generator installed with annual generation greater than 500kWh (a 1.4kW domestic wind turbine could have an annual output of 2000kWh) and accredited by OFGEM to receive ROCs (Renewable Obligation Certificates) See www.ofgem.gov.uk 
•Compliance from your local distribution company for connection of the renewable generator to the national grid.
•An OFGEM approved gross generation meter that measures all the output of your system,
•An export meter to register the amount of electricity you feed into the electricity network. (£75 plus VAT)
•A special inverter (called a Windy Boy) to synchronise the varying voltage from your wind turbine to the stable grid supply. This is individually programmed on-site to optimise power exported to the grid and to ensure network safety by disconnecting if the grid fails.

TO REGISTER FOR ROCs call OFGEM 0207 901 7000. Tradelink Solutions 01923 713840 could provide some help in registering.

Some energy companies with Green Tariffs in this area which will buy back electricity are:

ECOTRICITY LTD.

Ecotricity will pay you 4.5p for every unit of electricity you generate even if you use it on site (about 1000 units a year for average domestic microgeneration installations). In return, you give Ecotricity the ROCs awarded to you annually by OFGEM.
You need to inform Ecotricity annually of your generation meter reading which will be used to credit your bill for the electricity you generate.

GREEN ENERGY (UK) Plc

If you generate less than 2000kwh per year then the best option is to sell Green Energy your ROCs for which they currently pay 3p per kWh ROC.
For this you will only need a gross generation meter.

For more than 2000kWh generation you could sell the electricity that you don?t need back to Green Energy for 4p per kWh and 3p per kWh ROC. You also need to pay them 15p per day standing charge to sell electricity to the National Grid and you will need an export meter as well as a generation meter. One type of export meter for small generators is called a non-half hourly (NHH) meter. It costs about £75 plus VAT per year to operate

Call Green Energy UK on 08454569550 for a 'Sell us your energy' contract.
NB You don?t have to buy your energy from them.

GOOD ENERGY LTD

Good Energy currently pay 4.5p for each unit generated even if used on site. In return they claim the ROC you get from the government for generating renewable electricity. All the electricity you import from them is 100% renewable.
To become a home generator for Good Energy tel 0845 456 1640 or email the at homegen@good-energy.co.uk

NPOWER JUICE

Npower Juice matches every unit of electricity you use and feeds the same amount generated from renewable sources into the National grid.
They currently pay the same rate for the units you export as the units you import from them. You must have an export meter fitted.
Npower Juice also buys back ROCs at the rate of £33.24 per Mwh.
Tel 0800 3162610 or contact 01905 34 06 46 for generation customers.

EDF ENERGY

EDF offer two options:
•An un-metered one with a flat rate of £10 per kW of turbine installed per annum
•A metered one paying 7.4p for every unit of electricity exported to the National Grid.
Tel  07711023227
ROCs are over and above this and you can use a company like Tradelink Solutions (01923 28 55 83) to sell them.