Industrial and Commercial Solar Energy in Kenya
Energy is one of the largest operating costs for Kenyan businesses. Commercial and industrial electricity from KPLC costs between KES 18–25 per kWh for demand customers — and tariffs have increased by over 40% in the last five years. At the same time, quality: frequent demand charges, power factor penalties, and unplanned outages disrupt production and add to operating costs.
A commercial rooftop solar or ground-mounted solar installation directly displaces KPLC imports at the point of consumption. For a 100kW system in Nairobi generating 450–500 kWh per day, the energy saving is KES 8,000–12,000 per day. Over 25 years, that is a cumulative saving of KES 70–100 million. With capital costs recovered in 4–7 years, the remaining system life represents pure financial return.
Vajra Drill designs and delivers large-scale commercial solar projects across Kenya — from initial feasibility through to system handover and annual maintenance. Our 3-phase commercial inverters, industrial mounting structures, and AC/DC protection systems are engineered for decades of unattended operation in Kenya's climate.
Commercial Solar Services
Rooftop Commercial Solar
Solar PV mounted on flat or pitched commercial and industrial roofs. We use lightweight aluminium ballasted mounting systems on flat concrete or metal-deck roofs — no roof penetration required. Suitable for warehouses, factories, offices, shopping centres, hospitals, and hotels. System sizes from 20kW to 500kW on a single roof, with multi-roof configurations for larger sites.
Ground-Mounted Solar Farms
Steel post-driven or concrete-footing ground arrays for sites where roof space is insufficient or unsuitable. Ground-mounted systems allow optimal tilt angle and panel orientation, typically producing 5–10% more energy than flat-roof systems. Suitable for factory compounds, agricultural land, school fields, and undeveloped land adjacent to the consuming facility.
KPLC Net Metering
KPLC's net metering programme allows approved grid-tied solar customers to export surplus solar generation to the grid during low-demand periods (weekends, holidays) and receive credits against import bills. Vajra Drill manages the full KPLC net metering application process — technical submissions, grid connection agreements, and metering upgrades — as a turnkey service.
Solar Carports
Dual-purpose solar structures over car parks and logistics yards provide covered parking while generating electricity. Solar carports are increasingly popular with Nairobi office parks and retail centres — turning unproductive car park space into a revenue-generating asset. Canopy structures in hot-dip galvanised steel with 25-year structural warranty.
Energy Audit & Feasibility
Before any system is designed, we conduct a detailed commercial energy audit: analysing 12 months of KPLC bills, mapping load profiles by hour of day, identifying major consumers, and determining optimal solar + storage sizing. The output is a bankable feasibility report with NPV, IRR, payback period, and carbon reduction metrics — suitable for board approval or project financing.
How We Deliver Your Commercial Solar Project
Commercial solar projects involve more stakeholders and more regulatory steps than residential. Our structured process keeps everything on track and on budget.
- 1Energy Audit & Site Assessment
We analyse 12 months of KPLC bills and interval data to understand your load profile, peak demand, import/export pattern, and tariff category. Site survey covers roof or land area, shading, structural capacity, and grid connection point.
- 2System Design & Financial Modelling
PVsyst simulation produces a detailed annual yield report. Financial analysis covers capital cost, annual savings, IRR, NPV, and simple payback period — broken down for your specific KPLC tariff bracket and consumption pattern.
- 3KPLC & REREC Application
For grid-tied and net metering systems, we prepare and submit KPLC interconnection applications and REREC system registration documents on your behalf — managing the regulatory process from start to approval.
- 4Structural & Civil Works
Mounting structures are installed on roof or ground. For large systems, structural engineers certify roof load capacity. Transformer and switchgear upgrades are coordinated where required.
- 5Electrical Installation & Commissioning
DC wiring, inverter installation, AC protection, energy metering, and monitoring system are all installed and commissioned. IEC 62446 commissioning tests are completed and documented.
- 6Monitoring Activation & Handover
Remote monitoring portal is activated giving you real-time generation data, performance ratio, and alert notifications. You receive a full commissioning report, energy performance guarantee, and O&M schedule.
Industries We Serve
Manufacturing
Factories and processing plants with high daytime power loads — ideal solar demand match
Warehousing & Logistics
Large flat roofs ideal for solar — reducing energy costs for cold chains and distribution
Hotels & Hospitality
High electricity consumption combined with large roof areas makes hotels ideal commercial solar candidates
Healthcare
Hospitals and clinics benefit from solar + battery for reliable power and reduced operating cost
Schools & Universities
Educational institutions with daytime-dominated power demand aligned perfectly with solar generation
Shopping Centres
Retail malls combining rooftop solar with solar carports — large generation from multiple surfaces
Frequently Asked Questions
Under KPLC's net metering framework, a commercial customer with an approved grid-tied solar system has a bi-directional meter installed. When solar generation exceeds site consumption, surplus units flow back to the KPLC grid and are credited at the prevailing tariff against future imports. Credits are offset on the monthly KPLC bill. Systems above 1MW require a separate grid connection agreement and REREC generation licence.
System sizing depends on your monthly kWh consumption, operating hours (particularly hours between 8am–4pm when solar is available), available roof/land area, and budget. As a rough guide: consuming 50,000 kWh/month requires approximately 200–250kW of solar. We conduct a detailed energy audit and load profiling exercise before recommending system size — ensuring the system is optimised for your specific consumption pattern.
Standard monocrystalline solar panels weigh approximately 12–18 kg per module, adding around 12–15 kg/m² to the roof structure with ballasted mounting. Most commercial concrete flat roofs and IBR metal-deck roofs can accommodate this load. Our structural engineer reviews your roof design drawings and carries out a site inspection as part of the feasibility process. Where roof strengthening is required, we include this in the project scope.