As of most recent estimates, the cost of a BESS by MW is between $200,000 and $450,000, varying by location, system size, and market conditions. This translates to around $200 - $450 per kWh, though in some markets, prices have dropped as low as $150 per kWh. Key Factors. If you're exploring renewable energy storage solutions in Uruguay, understanding the cost of Battery Energy Storage Systems (BESS) is critical. Therefore, providing a reliable power supply for these auxiliary loads is crucial. The city's strategic position offers: When evaluating UPS factory prices in Peso City, consider these critical factors: "Our 80kVA UPS installation from a Peso City. The residential electricity price in Uruguay is UYU 10.