Cutting Energy Costs with Solar and Battery Storage: A Glass Factory Case Study in Spain

PROJECT OVERVIEW

A leading glass manufacturer in Spain sought a more sustainable and cost-effective energy solution as rising energy prices increased operating costs, including nearly $85,000 in annual diesel expenses.

The factory relies heavily on all-electric furnaces and large-scale cooling systems, both of which require a stable and substantial power supply. To maintain reliable energy while reducing operational costs, the company began exploring renewable energy solutions.

In response, United Energy Ltd deployed a tailored solar and energy storage system for the facility. The solution integrates three Deye 50kW hybrid inverters with UE 372kWh high-voltage lithium batteries, enabling efficient utilization of solar power throughout daily operations.

By combining renewable generation with energy storage, the system reduces diesel consumption, lowers long-term energy costs, and supports the factory’s sustainability goals.

THE SOLUTION

By integrating solar energy into its power supply and reducing reliance on grid electricity and diesel generators, the factory significantly lowered both fuel consumption and electricity expenses, achieving meaningful long-term cost savings.

Configuration

Solar Array: 150kW solar array(254pcs 590W PV module), integrated with three Deye 50K hybrid inverters.

Energy Storage: Two clusters of 186kWh rack-mounted lithium batteries, total capacity 372kWh

Reliable Power Supply: The solar-powered system allowed for 24/7 availability, ensuring that essential operations continued without disruption. The system also retains an interface for connecting to a diesel generator, allowing it to provide backup power during prolonged power outages

THE RESULT

The system has successfully transformed the factory’s energy strategy, improving both sustainability and operational efficiency.

Reduced Energy Costs

By significantly reducing reliance on diesel generators and optimizing solar power utilization, the factory successfully cut fuel consumption and lowered overall energy expenses, delivering meaningful long-term cost savings.

Reliable Power Supply

The integrated solar and lithium battery system ensures a stable and continuous energy supply, minimizing downtime and supporting the uninterrupted operation of critical equipment such as electric furnaces and cooling systems.

Looking for a solar and energy storage solution for your factory or commercial facility?
Contact United Energy to explore a customized energy system designed for your business.