Pupils, staff and governors at Christ Church in Woodland Vale Road are due to hold a special ceremony tomorrow (Oct 23) to celebrate the eco-friendly move.
They were due to be joined by the Mayor of Hastings, councillor Bruce Dowling and invited guests including representatives from the diocese and companies which helped the school achieve the project.
The priest of Christ Church will also carry out a special blessing.
The 29 Kilowatt array of panels was fixed on the roof of the school over the summer holidays.
Its installation was made possible by Wey Valley Solar Schools Energy Co-operative, a non-profit organisation based in Surrey.
The panels were given to the school and it will benefit from free electricity.
The Wey Valley Co-operative receives the feed-in tariff, the payment made by the government to generators of renewable energy.
Headteacher Anne Hanney said: “We are delighted with our new solar panels at the school.
“We will be saving money on our electricity bill and at the same time as reducing our carbon emissions.
The installation includes a monitor showing how much energy is generated and how much carbon is being saved.
“We will be working with the children to use this information as an educational tool.”
The Wey Valley Co-operative has previously installed panels at six sights in Surrey which have a generation capacity of 238 kw making it one of the biggest co-operatives in the country.
It takes around a quarter of a kilowatt to boil the average kettle.