St. Kitts and Nevis share a currency — the Eastern Caribbean Dollar — but have distinct electricity systems. The St. Kitts Electricity Department (SKELEC) serves the larger island; the Nevis Electricity Company (NEVLEC) serves Nevis. Both rely heavily on diesel generation, both charge rates in the EC$0.38–0.44/kWh range, and both islands have significant untapped solar potential. Here is the XCD picture for property owners and businesses on each island.

St. Kitts: SKELEC and the Solar Opportunity

SKELEC's current residential rate sits at approximately EC$0.40/kWh including fuel surcharge. With 4.7 peak sun hours per day on St. Kitts, a 5kW rooftop system generates approximately 17,050 kWh per year. At EC$0.40/kWh, annual savings are approximately EC$6,820. At a fully installed system cost of approximately XCD 42,000–48,000, simple payback is 6.2–7.0 years. SKELEC has a functioning net metering framework that allows residential systems up to 5kW to export excess energy to the grid at retail rate — a more favorable arrangement than many Eastern Caribbean jurisdictions.

Nevis: The NEVLEC Context

Nevis is a smaller grid with a higher electricity cost — NEVLEC rates are approximately EC$0.43–0.46/kWh. The smaller grid size makes integration of solar more technically challenging at scale, but individual rooftop systems remain economically compelling. A 5kW system on Nevis saves approximately EC$7,400–8,000 per year, with payback in the 5.5–6.5 year range at current equipment costs. NEVLEC has been in discussions about a 5MW/20MWh battery storage project announced in early 2026 with ADB financing — this would significantly expand the grid's capacity to absorb rooftop solar without stability concerns.

The Battery Storage Milestone

The 5MW/20MWh battery storage project represents a landmark for the Eastern Caribbean. When commissioned, it will allow St. Kitts & Nevis to operate at up to 60% renewable penetration without grid stability issues — up from the current practical limit of around 20%. For rooftop solar owners, grid-scale battery storage means fewer curtailment constraints and more reliable net metering credit. The project is financed by the ADB at concessional rates, with the capital cost recovered through avoided diesel fuel savings.

XCD Investment Summary

For a St. Kitts homeowner: XCD 45,000 system, EC$6,820/year savings, 6.6-year payback, approximately EC$148,000 net savings over 25 years. For a Nevis homeowner: XCD 44,000 system, EC$7,700/year savings, 5.7-year payback, approximately EC$148,500 net savings over 25 years. Both represent exceptional risk-adjusted returns in an XCD-denominated economy.