UPDATE 1-Saudi-led group close to win Moroccan solar plant

* Contract is for 160 MW solar plant, worth minimum $500 mln

* Enel, Mitsui and UAE's Taqa vied for deal

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RABAT, June 13 (Reuters) - A consortium led by Saudi

International Company for Water and Power (ACWA) is close to win

a contract worth at least $500 million to build a 160-megawatt

concentrated solar power plant south of Morocco, an official

source said on Wednesday.

"We are going to opt for the offer made by the consortium of

Acwa," the source, familiar with the discussions about the

contract, told Reuters. The source asked not to be named pending

an official announcement due later this week.

Acwa has teamed up with Spanish engineering firm Aries IS

and TSK EE for the design, finance, construction, operation and

maintenance of the plant near the southern city of Ouarzazate.

"(Morocco's solar energy agency) Masen will make the

announcement over the weekend, either Friday or Thursday. The

signing ceremony will be on Saturday," said the source.

The announcement of the deal will coincide with the expected

landing in Ouarzazate of solar energy plane Solar Impulse, which

took off from Rabat on Wednesday after it completed last week

the world's first intercontinental flight powered by the sun.

Officials at Masen were not immediately available for

comment.

In addition to the Acwa-led consortium, two other groups

have been involved in the final selection processes for the

contract. They are:

- Abeinsa ICI, Abengoa Solar, Mitsui and Abu Dhabi

National Energy Co.

- Enel and ACS SCE.

The contract for the 160-megawatt plant will be the first to

be awarded by Masen under the so-called Moroccan Solar Plan that

aims to attract investments worth $9 billion to produce 2 GW of

solar power by 2020, which corresponds to 38 percent of the

country's current installed power generation capacity.

The plan will include five power stations, two of which are

located in the disputed Western Sahara, and the other in

Morocco, including Ouarzazate.

Facing an electricity demand that rises by an annual 7

percent and a gaping trade deficit from heavy reliance on fossil

fuel imports, Morocco also bets renewable energies would enable

it to export electricity to energy-hungry trade partner, the

European Union.

Last month, Masen's head Mustafa Bakkoury said the agency

hopes to complete a 500-megawatt solar energy complex in

Ouarzazate by 2015.

Masen will later launch tenders to build a 50-megawatt

photovoltaic module and CSP towers of at least 50 megawatts,

both of which are in Ouarzazate.

(Reporting By Souhail Karam; editing by James Jukwey)