Solar Panel Installation Cost in UAE
July 25, 2026
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At Watts & Ergon, a DEWA-approved solar contractor, we help homeowners and businesses understand real costs and get maximum value from their investment.
How to Size a Solar Battery System in UAE
At Watts & Ergon , we help industries design optimized solar + battery solutions tailored to their exact energy needs.
Sizing a solar battery system correctly is critical to ensure reliable backup power, maximize savings, and avoid costly under- or over-sizing. Whether you want to store excess solar energy for night use or achieve energy independence during outages, proper battery sizing makes all the difference.
At Watts & Ergon, we help industries design optimized solar + battery solutions tailored to their exact energy needs.
Why Proper Battery Sizing Matters
- Prevents system failure during critical operations
- Optimizes return on investment (ROI)
- Reduces unnecessary battery costs
- Ensures longer battery lifespan
- Supports your factory’s peak load demands
Step-by-Step Guide to Sizing a Solar Battery System
Step 1: Calculate Your Daily Energy Consumption
| Appliance / Load | Power Rating (W) | Hours Used / Day | Daily Energy (kWh) |
|---|---|---|---|
| Factory Lighting | 5000 | 12 | 60 |
| Machinery (Average) | 15000 | 8 | 120 |
| HVAC System | 8000 | 10 | 80 |
| Other Loads | 7000 | 6 | 42 |
| Total Daily Consumption | 302 kWh | ||
Step 2: Determine Days of Autonomy
Decide how many days you want the battery to support your loads without solar input (typically 1–3 days for factories).
Step 3: Account for Depth of Discharge (DoD) & Efficiency
| Battery Type | Recommended DoD | Round-trip Efficiency |
|---|---|---|
| Lithium-ion (LiFePO4) | 80–95% | 95–98% |
| Lead-Acid | 50% | 80–85% |
Battery Sizing Formula
Required Battery Capacity (kWh) =
(Daily Energy Consumption × Days of Autonomy) ÷ (DoD × System Efficiency)
(Daily Energy Consumption × Days of Autonomy) ÷ (DoD × System Efficiency)
Example:
Daily consumption = 302 kWh
Autonomy = 2 days
DoD = 90% (Lithium)
Efficiency = 95%
Required Capacity = (302 × 2) ÷ (0.90 × 0.95) ≈ 706 kWh
Factors That Affect Battery Sizing
- Peak load demand (kW)
- Solar array size and location
- Local weather patterns
- Critical vs non-critical loads
- Future expansion plans
- Tariff structure and time-of-use rates
Recommended System Configurations
| Factory Size | Daily Consumption | Recommended Battery | Autonomy |
|---|---|---|---|
| Small Factory | 50–150 kWh | 100–300 kWh | 1–2 days |
| Medium Factory | 150–500 kWh | 300–800 kWh | 2 days |
| Large Industrial | 500+ kWh | 1 MWh+ | 2–3 days |
Need Help Sizing Your Solar Battery System?
Our experts at Watts & Ergon provide precise calculations, professional design, and turnkey installation.
Solar Maintenance in Dubai:
July 25, 2026
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At Watts & Ergon, we specialize in professional solar maintenance services in Dubai. As a DEWA-approved solar contractor and ISO-certified company, we help homeowners, commercial properties, and industrial facilities protect their solar investment and maintain peak efficiency.
Solar Panel Installation in Dubai
July 25, 2026
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At Watts & Ergon, we specialise in complete solar panel installation in Dubai — from system design and DEWA approvals to professional installation, commissioning, and long-term maintenance.