Reliable Power During Every KPLC Outage
Kenya Power (KPLC) outages remain one of the most significant operational disruptions for homes, businesses, and critical facilities across Nairobi and Kenya. An unplanned outage lasting 4–8 hours can mean spoiled cold chain stock, interrupted clinical care, lost production, and missed business. Solar backup systems — combining hybrid inverters, battery banks, and solar panels — provide seamless, automatic power continuity with no noise, no diesel, and no manual intervention.
Unlike a diesel generator that takes 10–30 seconds to start, a hybrid inverter with battery backup switches to battery power in under 20 milliseconds — imperceptible to computers, servers, medical equipment, and sensitive electronics. When paired with solar panels, batteries recharge during daylight hours, meaning multi-day autonomy is achievable even without grid power.
Vajra Drill designs and installs solar backup systems using Growatt, Victron Energy, and Deye hybrid inverters — matched to Pylontech and Narada LiFePO4 battery banks for residential, commercial, and critical infrastructure applications throughout Kenya. We size every system against your actual load profile — not guesswork — to ensure the right autonomy period at the right capital cost.
Solar Backup Solutions
Hybrid Inverter Systems
Growatt, Victron, and Deye hybrid inverters integrate the grid, solar panels, and battery in one unit — managing all three power sources intelligently. The inverter charges batteries from solar first, grid second; exports excess solar to the grid where net metering applies; and automatically switches to battery during outages. Single-phase systems from 3kVA to 10kVA; three-phase commercial systems from 15kVA to 150kVA+.
Lithium Battery Banks (LiFePO4)
Pylontech US2000/US3000 and Narada LiFePO4 batteries with integrated battery management systems (BMS) — 6,000+ cycle life (16 years at one full cycle/day), 95% depth of discharge, and rack-mounting for scalable expansion. LiFePO4 chemistry is thermally stable, non-flammable, and safe for indoor installation. Standard residential packs: 5kWh–20kWh. Commercial banks: 50kWh–500kWh.
Lead-Acid Battery Systems
For budget-conscious applications where upfront cost is the priority, sealed VRLA (AGM/Gel) lead-acid batteries provide reliable backup at lower capital cost. Well-suited for telecom towers, security systems, and applications where battery cycling is moderate (fewer than once per day). Cycle life 500–1,200 cycles. Available as 12V/100Ah–250Ah units with cabinet enclosures.
Telecom Tower Battery Backup
Outdoor battery cabinets with IP55 enclosures, thermal management, and remote monitoring via SNMP/GSM for telecommunications towers and remote infrastructure. We supply and install OPzV tubular gel batteries and LiFePO4 packs for 48V telecom systems, with full BTS integration. Designed for 4–8 hours of tower autonomy during extended outages.
Generator Integration & Load Management
For critical facilities requiring extended autonomy beyond battery capacity, we integrate diesel generators with solar-battery hybrid systems — using automatic transfer switches (ATS) and intelligent load management. The generator starts only when battery state-of-charge falls below threshold, minimising diesel consumption and runtime hours while maintaining power continuity.
How We Design & Install Your Solar Backup System
A backup system that underperforms during a real outage is useless. Our engineering-led process ensures the system we install is sized correctly and tested thoroughly before handover.
- 1Load Profile Assessment
We measure or enumerate your critical loads — appliances, equipment, lighting, servers — and their daily usage patterns. This establishes the total energy (kWh) and peak power (kW) the backup system must handle.
- 2Autonomy Target & Battery Sizing
Based on your required backup duration (4 hours, 8 hours, or multi-day) we calculate the battery bank capacity needed. LiFePO4 chemistry and brand (Pylontech, Narada) are selected based on budget and cycling requirements.
- 3Inverter Selection & System Design
Hybrid inverter size (kVA) is selected to handle peak surge loads (motor starting). Single-line diagram and load distribution board schedule are produced. Solar array sizing is added if solar charging is included in the scope.
- 4Inverter & Battery Bank Installation
Inverter is wall-mounted in a ventilated location. Battery rack and LiFePO4 modules are installed and BMS cables connected in the correct sequence. AC input, AC output, and DC battery cables are sized and run to specified standards.
- 5Solar Panel Integration
Where solar panels are included, DC combiner, cabling, and mounting structure are installed. Inverter is configured for the correct solar charging profile and battery voltage thresholds.
- 6Commissioning, Testing & Client Training
A simulated grid outage test confirms switchover time (<20ms) and runtime at full load. Monitoring app is configured. Client is trained on system indicators, battery state of charge, and what to do in an extended outage.
Applications & Sectors
Homes & Apartments
Residential backup for Nairobi homes — protecting fridges, lighting, Wi-Fi, and security during outages
Offices & SMEs
Business continuity backup for computers, servers, CCTV, POS systems and office equipment
Healthcare
Uninterruptible power for clinics and hospitals — critical medical equipment, refrigeration, and lighting
Telecom Towers
48V battery cabinets and LiFePO4 packs ensuring continuous BTS operation during grid failures
Cold Chain & Refrigeration
Storage for vaccines, pharmaceuticals, floriculture, and food — no power = no cold chain
Data Centres
Online UPS-grade reliability via LiFePO4 hybrid systems for server rooms and data centres in Kenya
Frequently Asked Questions
Autonomy depends on battery capacity (kWh) and your load (kW). A 10kWh lithium battery powering a 1kW essential load (fridge, lights, Wi-Fi, phone charging) runs for 8–10 hours. A 5kW load needs 40kWh for 8 hours. We calculate your actual load profile — measuring or estimating each appliance's power draw and usage pattern — before recommending a battery size that matches your real backup requirement and budget.
A hybrid inverter with batteries switches to backup power in under 20 milliseconds — fast enough that computers, servers, and medical equipment experience no interruption. A diesel generator typically takes 10–30 seconds to start, and causes a power break that resets computers and trips sensitive equipment. Generators also require diesel fuel (expensive and supply-dependent), produce noise and exhaust, and require regular servicing. Battery systems are silent, zero-emission, and require virtually no maintenance. For facilities that need extended autonomy beyond 12 hours, we combine both: batteries for instant switchover with a generator for recharging.
Yes — this is the key advantage of a hybrid solar system. When paired with solar panels, batteries recharge during daylight hours even when the grid is off. A 5kW solar array can fully recharge a 10kWh battery bank in 2–3 hours of good sunshine. This means multi-day autonomy is achievable: solar charges during the day, battery powers the load at night. Without grid power for weeks, a solar-battery system remains fully self-sufficient — ideal for remote sites, farms, and critical facilities.