# Zanzibar’s ZECO awards 40 MWh Mtoni battery storage contract to Sieyuan Electric

> Sixteen bids were received; the signed price of USD 16.5 million is above the winner’s evaluated bid of USD 12.4 million.

- Topic: Contract award
- Event date: 2026-08-28
- First published on EPC Feed: 2026-10-24T06:44:58.097Z
- Updated: 2026-10-24T06:44:58.097Z
- Value: USD 16,506,978.99
- Companies: Zanzibar Electricity Corporation, Sieyuan Electric, World Bank
- Countries: Tanzania
- Page: https://epcfeed.com/news/zanzibar-mtoni-battery-storage-awarded-to-sieyuan-electric


## Key facts

- Employer: Zanzibar Electricity Corporation (ZECO)
- Winner: Sieyuan Electric Co., Ltd. (China)
- Capacity: 40 MWh, Mtoni
- Signed price: USD 16,506,978.99
- Bids: 6 evaluated, 10 rejected

Zanzibar Electricity Corporation (ZECO) has awarded the design, supply, installation, testing, commissioning and initial operation of a 40 MWh battery energy storage system at Mtoni to Sieyuan Electric Co., Ltd. of China, according to the World Bank award notice published on 28 August 2026. The notification of award is dated 14 July 2026.

The signed contract price is USD 16,506,978.99 for a 36-month contract, against an evaluated bid price of USD 12,421,500.00. The notice does not explain the difference.

Of the 16 bids listed, six were evaluated, with prices from USD 12.26 million to USD 25.82 million, and ten were rejected as non-responsive or for failing the minimum technical score.

## Sources

1. [World Bank procurement notice OP00465536: Contract award, 40 MWh battery energy storage system at Mtoni](https://search.worldbank.org/api/v2/procnotices?format=json&id=OP00465536). Official notice, World Bank, Published 2026-08-28, Read 2026-10-23.