It is expected to supply electricity to up to 16,000 households. The battery storage system will help stabilize the grid by storing excess solar energy for use when needed.
Modern EVs have big, efficient batteries capable of storing enough energy to power home for days. That can mean backup power during a storm or the ability to use stored energy during expensive peak hours and recharge again when kilowatts are cheap.
Residential Systems (5–15 kWh): $6,000–$23,000 installed, relying on manufacturer and inverter type. 4 kWh lithium battery system: about $9,000, appropriate for usual households.
For C&I end users, however, the relevant price signal is different: the current commercial electricity rate stands at GTQ 1. 509/kWh (approximately USD 0. 197/kWh) as of September 2025 data, including all transmission, distribution, taxes, and fees.
System Capacity: Prices range from $1,200 for 3kWh residential units to $25,000+ for 50kHz commercial setups. Data reflects 2023 quotes from Castries-based installers.