Smart Grid Connection & Maximum Autarky

DEWA charges AED 2,000–5,000 per kW of additional sanctioned load. A +100 kW upgrade costs approximately AED 200,000–500,000; a +500 kW upgrade for a community EV hub costs AED 1,000,000–2,500,000. Lead times are 8–32 weeks depending on transformer availability. Battery storage with load management often costs less and generates ongoing savings, avoiding the upgrade entirely.

The DEWA Letter of Credit (LOC) is the official document confirming the available grid capacity and connection terms for a solar or EV project. Without the LOC, no equipment can be specified or ordered — it defines the allowable system size, protection relay requirements and meter type. sun2X submits the grid study and manages LOC applications as standard.

From initial grid study submission to final energisation, DEWA approval typically takes 8–16 weeks. This covers the LOC (4–8 weeks), protection design review, Dubai Municipality or Trakhees NOC (3–6 weeks) and commissioning witness test. The full permit pack involves 18–24 documents, which sun2X manages entirely.

DEWA charges AED 0.38/kWh at peak rate, applicable during the 14:00–17:00 window daily for commercial and industrial customers. ADDC (Abu Dhabi) charges a flat AED 0.20/kWh — 47% lower than DEWA. Battery peak-shaving during the DEWA peak window typically saves commercial customers AED 80,000–200,000 per year.

DEWA limits Total Harmonic Distortion (THD) to ≤5% for grid-connected inverter systems. Active filtering is required for most commercial solar and battery installations. Non-compliance can result in reconnection fees up to AED 50,000 and loss of the Shams Dubai net metering agreement. sun2X specifies all inverters with built-in active harmonic filtering as standard.