How BESS Cuts Energy Costs for African Businesses

Battery Energy Storage Systems are becoming a practical cost-control tool for African businesses affected by unstable grids, rising diesel expenses and production interruptions. The potential for BESS cost savings in Africa comes from storing electricity when it is available or less expensive and using it when grid power is costly, unreliable or unavailable.

Actual savings depend on the local tariff, load profile, outage frequency and system design. A proper energy audit should therefore be completed before investment.

Reducing Diesel Generator Use

Many businesses rely on diesel generators during grid outages. In addition to fuel, generator operation creates servicing, lubricant, spare-parts and replacement costs.

A BESS can respond immediately when the grid fails, supporting selected loads without waiting for a generator. For longer outages, it can reduce generator operating hours or allow the generator to run at a more efficient loading level.

Consider a facility using 20 litres of diesel per hour at an illustrative fuel price of USD 1.20 per litre. Four hours of daily generator operation would cost approximately USD 96 per day in fuel alone:

20 litres × USD 1.20 × 4 hours = USD 96

If a BESS removes two hours of generator operation per day, the indicative fuel saving would be USD 48 daily, or about USD 17,520 annually before considering maintenance savings.

Peak Shaving and Demand Management

Commercial and industrial facilities often experience short periods of high demand when motors, cooling systems and production equipment operate simultaneously.

Where the electricity tariff includes a demand charge, a BESS can discharge during these peaks and lower the maximum demand recorded by the utility.

For example, if storage reduces a facility’s billed peak by 100kW and the applicable demand charge is USD 10 per kW, the indicative monthly saving would be:

100kW × USD 10 = USD 1,000 per month

This benefit only applies where the tariff includes demand-based billing. Businesses should first review their utility bills and metering data.

Using More Solar Energy

A solar photovoltaic system may generate more electricity than a business can use during certain daytime periods. Without storage, this surplus may be exported at a low value or wasted.

A BESS stores the excess solar energy for use later, reducing electricity purchases and generator use after solar production declines. This can improve the value of an existing or planned solar installation.

Preventing Outage Losses

The largest BESS saving may come from avoiding interrupted production, damaged materials, lost data and delayed customer orders.

If one outage stops a production line costing USD 2,000 per hour, preventing only ten hours of downtime annually could preserve USD 20,000 in operational value. Each business should calculate this using its own verified downtime cost.

Calculating the Business Case

A reliable assessment should include:

• Electricity and demand-charge savings
• Avoided diesel and generator maintenance
• Avoided outage losses
• Battery efficiency and degradation
• Maintenance and replacement costs
• Available solar generation
• Expected system lifespan

GEMIN designs, supplies and maintains BESS solutions for commercial and industrial clients across Tanzania and East Africa. A site assessment and load analysis can determine whether storage is financially and technically suitable for your facility.

Request a BESS Energy Assessment