Solar panels for SME datacenters in Africa: sizing and budgeting in 2026

Frequent power outages in West Africa make solar investment essential for any SME mini-datacenter. Here's how to size correctly and budget.

1. Calculating energy requirements

For a typical SME mini-datacenter:

• 1 x 1U Dell/HPE server: ~250 W
• 1 x 4-bay NAS storage rack: ~80 W
• 1 x 24-port PoE+ switch: ~150 W (peak with active PoE)
• 1 x SME firewall: ~30 W
• Room air conditioning: ~800-1500 W (warm season)
• Total average continuous: ~1300-2000 W (1.3-2 kW)

2. Solar panel sizing

For 2 kW continuous in Burkina Faso (5-6 hours useful sunlight/day):

• Production target: 2 kW × 24 h = 48 kWh/day
• Required solar production: 48 kWh / 5 h = ~10 kWc panels
• That is ~25 x 400 Wc panels (professional modules)

3. Battery storage

For 12-hour autonomy without sunlight:

• Capacity: 2 kW × 12 h = 24 kWh
• Safety margin for discharge depth (LiFePO4 80%): 30 kWh nominal
• That is 6 x Pylontech US3000C 3.5 kWh or equivalent

4. Inverters and controllers

• 3 kVA hybrid inverter (Victron MultiPlus-II) — €1,050 excl. VAT
• 100/50 MPPT controller — €280 excl. VAT
• Wiring, protections, monitoring — ~€500 excl. VAT

5. Total indicative budget

• Solar panels 10 kWc: ~€5,000 excl. VAT (in Ouagadougou)
• LiFePO4 batteries 30 kWh: ~€12,000 excl. VAT
• Inverter + controller + accessories: ~€2,000 excl. VAT
• Installation + structure: ~€2,500 excl. VAT
• Total: ~€21,500 excl. VAT

6. ROI

Assumptions: monthly electricity bill €250 (with outages) + occasional equipment damage ~€500/year:

• Annual savings: €250 × 12 + €500 = ~€3,500
• ROI: ~6 years (LiFePO4 lasts 10-15 years)
• Secondary benefit: total operational continuity

Conclusion

€21,500 excl. VAT for 6 years of autonomy + zero outages. For a critical SME datacenter, solar is cost-effective in the medium term and essential for resilience.