---
title: "A school roof with a battery for evening use"
description: "An 85 kWp roof array and a 60 kWh battery that power classrooms by day and the sports hall in the evening."
url: "https://ecozen-astro.pages.dev/projects/school-rooftop-battery/"
date: "2026-05-20"
---

# A school roof with a battery for evening use

> An 85 kWp roof array and a 60 kWh battery that power classrooms by day and the sports hall in the evening.

A primary school wanted to cut its energy costs and give pupils a real example of clean power. The buildings use most of their electricity during lessons, but the sports hall is rented out to local clubs every evening.

## The challenge [.h4]

Work could only happen during the summer holidays, so the whole project had to be finished in six weeks. The roofs are a mix of old and new buildings, and the school needed a clear plan for safety, access, and approvals before term ended.

## The system we designed [.h4]

We surveyed every roof in the spring, chose the three with the best structure and sun, and planned the work so the playground stayed open for summer clubs. A battery covers the evening hall bookings with power stored during the day.

- 210 panels, 85 kWp, across three roofs
- A 60 kWh battery in a fire-rated plant room
- A production screen in the main hall for teaching
- Remote monitoring with a monthly report for the governors

## The result [.h4]

The system was switched on a week before term started. It produces 82,000 kWh a year and covers about 60% of the school's electricity, and the battery runs the sports hall on most weekday evenings.