Kenya's Trusted Solar Energy Company
Kenya receives an average solar irradiance of 4.5–6.5 kWh/m² per day — among the highest in the world. This extraordinary solar resource, combined with rising KPLC tariffs, frequent power outages, and the falling cost of solar technology, makes solar energy the most compelling investment for Kenyan homes, businesses, farms, and institutions today.
Vajra Drill is a full-service solar energy company based in Nairobi, REREC-licensed and operating across Kenya. We design, supply, and install all categories of solar systems — from a simple rooftop residential solar installation in Karen to a large commercial solar-plus-storage facility in an industrial park. Our solar engineers are qualified, our equipment is sourced from Tier-1 manufacturers, and every installation comes with a formal performance guarantee.
As an integrated water and energy company, Vajra Drill is uniquely positioned to deliver the most impactful solar applications in Kenya: solar-powered boreholes where the pump runs entirely on solar with no fuel or KPLC costs, and integrated solar-water systems where a single project delivers reliable water supply and electricity from one investment.
Our Solar Services
Six specialised solar service lines cover the full range of applications — each available standalone or as part of an integrated energy solution.
Solar Power Systems
Grid-tied, off-grid, and hybrid solar PV systems for homes, offices, and institutions. From 1kW domestic systems to 100kW+ commercial installations, using Tier-1 panels and certified inverters with full performance monitoring.
Solar Water Pumps
DC and AC solar-powered submersible and surface pumps for boreholes, rivers, and dams. Lorentz, Grundfos SQFlex, and Shimge solar pump systems with no fuel cost and minimal maintenance — ideal for farms, ranches, and off-grid communities.
Commercial Solar
Large-scale rooftop and ground-mounted solar PV for factories, warehouses, shopping centres, hotels, and institutions. KPLC net metering, on-bill financing, and PPA structures to deliver immediate cost savings with zero upfront capital in qualifying cases.
Solar Water Heating
Flat-plate and evacuated-tube solar water heating systems for domestic, hotel, hospital, and apartment block applications. Kenya Building Code compliant. Replaces electric immersion heaters and LPG boilers — typically paying back in under 3 years.
Solar Backup & Storage
Hybrid solar systems with lithium battery backup for load-shedding protection and off-grid resilience. Victron, Growatt, and Deye hybrid inverters with Pylontech and Narada battery banks — seamless automatic switchover during KPLC outages.
Solar Installation & Maintenance
Professional installation, commissioning, and ongoing maintenance for all solar system types. REREC-certified technicians, module-level performance monitoring, annual maintenance contracts, and rapid fault-response — protecting your solar investment for its full 25-year life.
How a Vajra Drill Solar Project Works
From your first enquiry to a live, monitored solar system — here is the process we follow on every project.
- 1Free Site Assessment
Our solar engineer visits your site to assess roof or land area, shading, orientation, existing electrical infrastructure, and grid connection details — giving us the data to design the right system for your specific location.
- 2System Design & Financial Proposal
We model your system in PVsyst or equivalent software, generating a detailed yield estimate, energy savings calculation, payback period, and ROI projection — alongside a full itemised quotation.
- 3Equipment Procurement
On acceptance, we procure Tier-1 solar panels, certified inverters, and balance-of-system components from approved suppliers. Equipment is inspected on receipt before delivery to site.
- 4Structural & Mechanical Installation
Galvanised mounting structures are installed on roof or ground. Panels are racked, grounded, and wired in strings to the inverter room or distribution board location.
- 5Electrical Installation & Commissioning
Inverters, battery banks, protection devices, and monitoring systems are installed and configured. IEC 62446 commissioning tests are completed and the system is energised.
- 6REREC Registration & Handover
The system is registered with REREC and KPLC where applicable. You receive a commissioning report, system manual, monitoring app access, and warranty certificates.
Why Solar Makes Sense in Kenya Right Now
KPLC Tariffs Rising Every Year
Kenya's commercial and industrial electricity tariffs have increased significantly over the past decade. Solar fixes your energy cost for 25 years — locking in predictable, low-cost power while grid tariffs continue to rise.
Eliminate Diesel Generator Costs
Diesel generators cost 40–80 KES per kWh to run versus 5–8 KES for solar. Hybrid solar-battery systems replace generator runtime almost entirely — dramatically reducing fuel, maintenance, and refuelling logistics costs.
Reliable Power Despite Outages
Nairobi and upcountry areas experience regular planned and unplanned power outages. Solar with battery backup provides seamless, uninterrupted power — protecting production, refrigeration, computing, and security systems.
5–8 Year Payback, 25-Year Life
A well-designed commercial solar system in Kenya typically achieves ROI within 5–8 years and continues generating free electricity for a total system life of 25+ years — a compound annual return that beats almost all alternative investments.
Solar Solutions FAQs
Exceptionally so. Kenya sits close to the equator and receives solar irradiance averaging 4.5–6.5 kWh/m²/day — higher than Germany, the UK, or most of Europe where solar is well-established. The Rift Valley, Northern Kenya, Coastal Kenya, and Nairobi all receive excellent solar resources enabling high-performance systems year-round.
Solar installers in Kenya should be registered with the Renewable Energy Regulatory Commission (REREC), formerly part of ERC. For KPLC grid-connection (net metering), approval from KPLC engineering is required. Larger systems above 1MW require an ERC generation licence. Vajra Drill holds all required registrations and manages all approvals as part of the project.
Grid-tied systems export surplus power to KPLC and import when solar is insufficient — lowest cost but no backup during outages. Off-grid systems have no KPLC connection and rely entirely on solar and batteries. Hybrid systems are connected to KPLC but also have batteries, providing backup during outages while still benefiting from grid connection. For most Nairobi businesses, hybrid is the most practical option.
A domestic solar installation (1–5kW) typically takes 1–2 days. A commercial rooftop system (20–100kW) takes 1–2 weeks depending on roof access and cable runs. Large ground-mounted systems (100kW+) require 2–6 weeks including civil works for mounting structures. KPLC net metering approval typically adds 2–6 weeks to grid-connection projects.