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About us 

De-Sun Solar Systems is a reputable Kenyan solar energy company established in 2020 by Dennis Wanderi, a visionary entrepreneur dedicated to providing clean, affordable energy solutions. Located at Venus Complex along the Northern Bypass, we cater to homes, farms, institutions, and businesses throughout Kenya with durable, customized solar systems.


Mission
We design and deliver innovative solar solutions, empowering Kenyans to reduce costs, stay energized, and live sustainably, no matter where they are!

Vision

To transform Kenya's energy landscape by prioritizing clean,reliable solar energy as the preffered choice for every home,farm and business.

Core Values


• Integrity – We consistently deliver on our promises.
• Sustainability – We design systems that are built to endure.
• Innovation – We leverage proven technology and continuously adapt.
• Customer Focus – We listen, customize, and provide unwavering support.
• Work Ethic – "Kazi safi kila siku" is not just a motto; it embodies our commitment!

 

Why choose desun solar?

 Expert Installations

✅ National Services

✅ On-Time Completion

✅ Competitive pricing

✅ High-Quality Materials

✅ Customer Satisfaction

Our Services

solar water heating Systems and all in one heat pump systems

Harness the sun's energy to heat your water efficiently. Our solar water heating systems are engineered to lower energy costs while providing a sustainable solution for both homes and businesses.

solar power backup systems

Never experience downtime again with our reliable backup power systems. We guarantee an uninterrupted power supply for essential operations in both homes and businesses.

borehole solarization kits

Transform your borehole into a sustainable water source. Our solarization solutions ensure reliable and cost-effective water pumping, harnessing the power of clean solar energy.

Hybrid solar systems

Enhance energy efficiency with hybrid solar systems that integrate solar power with conventional energy sources, offering flexibility and reliability to meet your power requirements.

off-grid solar systems

Empower your life, even in the most remote areas, with our off-grid solar solutions. These systems are designed to deliver sustainable energy in places where traditional power sources are inaccessible.

solar energy consulting & auditing

Expert evaluations and customized solar solutions for residences, businesses, and industries to enhance energy efficiency.

Get in touch  +254 792 958918 

Latest Projects

30kw solar system 

The system installed was aimed at reducing cost and having a reliable source of power to cater for all the Restaurant's needs and uses.


System components installed include:


  • Fifty (50) 590 W high-efficiency JA bificial solar panels, strategically mounted to maximize sun exposure and energy generation.
  • Six (6) 5.12  kWh HV lithium batteries (GoodWE) , providing reliable backup power during outages and evening hours.
  • A 30kw HV low frequency Hybrid inverter (GoodWE) and protection systems to ensure safe, stable, and efficient power delivery.


This 30kW solar system can power:

  • Up to 100 LED lights
  •  Coldroom
  •  Freezers & Fridges
  • MIcrowaves 
  •  washing machines
  • Dishwashers
  •  TVs and sound systems ( 25+)
  • 1000L RO system
  • Heatpump
  •  Wi-Fi

 

5KW SOLAR SYSTEM & 200NP SOLAR WATER HEATER SYSTEM

The system features a 5 kW solar power setup paired with energy storage and a solar water heating solution, all professionally installed and commissioned by our technical team.


System components installed include:


  • Four (4) 650 W high-efficiency LONGI solar panels, strategically mounted to maximize sun exposure and energy generation.
  • A 5.12 kWh lithium battery, providing reliable backup power during outages and evening hours.
  • A high-performance solar inverter and protection systems to ensure safe, stable, and efficient power delivery.
  • A 200-litre NP solar water heater, supplying the household with consistent hot water using solar thermal energy.


This 5kW solar system can power:

  • Up to 25 LED lights
  •  Microwave
  •  Freezer
  • Fridge
  •  Two washing machines
  •  TV and sound system
  •  Wi-Fi

 

`12kW Solar System

A 12 kW solar power system was successfully installed in Ruiru, delivering reliable, efficient electricity while significantly enhancing power stability and reducing dependence on the national grid.

The system features a 12 kW three-phase low-frequency hybrid inverter, paired with high-capacity energy storage and a robust solar array, all professionally installed and commissioned by our technical team to ensure safety, durability, and optimal energy performance.


System components installed include:

  • Thirty (30) 590 W high-efficiency bifacial JA Solar panels, strategically mounted to maximize energy generation throughout the day.
  • A 12 kW 3 three-phase low-frequency hybrid inverter, designed to handle heavy loads and provide stable power across multiple phases.
  • Eight (8) low-voltage 5.12 kWh lithium batteries, offering substantial energy storage for uninterrupted power supply during outages and peak demand periods.
  • Comprehensive protection systems, including DC/AC isolators and surge protection, for safe and reliable long-term operation.

This 12 kW solar system supports:

  • Up to 100 LED lights
  • Fridges and freezers
  • Microwaves
  • Heating elements for two solar water heaters
  • Booster pumps
  • Wi-Fi and networking equipment
  • TVs and sound systems (8+)
  • Automated gate systems
  • Electric fence
  • Electric oven
  • CCTV and alarm systems


Solar Water Heater

Experience the benefits of an efficient, reliable, and expertly installed solar water heating solution with our 300-L solar water heater. Designed to meet your hot water needs consistently, this advanced system not only provides ample hot water for your household but also significantly reduces your energy costs. 

With our solar water heater, you can enjoy peace of mind knowing that you are making an environmentally friendly choice without sacrificing performance. Take advantage of the power of the sun and enjoy a steady supply of hot water, all while contributing to a more sustainable future.

Key Features

  • Large 300-L capacity for residential or small commercial use
  • High-efficiency solar collectors for maximum heat absorption
  • Energy-saving, reducing electricity or fuel consumption
  • Reliable hot water supply throughout the day
  • Durable materials and corrosion-resistant components
  • Easy to operate and maintain
  • Optional backup heating element for cloudy days or high demand
  • Environmentally friendly and sustainable

6KW Solar System

The system features a 6 kW off-grid solar power setup paired with energy storage, all professionally installed and commissioned by our technical team in Kavaini, Kitui County.


System components installed include:

  • Eight (8) 650 W high-efficiency solar panels, strategically mounted to maximize sun exposure and energy generation.
  • Two advanced lithium batteries with a combined storage capacity of 5.12 kWh, providing reliable backup power during outages and nighttime use.
  • A high-performance  6KW off-grid solar inverter with integrated protection systems to ensure safe, stable, and efficient power delivery.
  • Complete electrical protections and system balancing for long-term reliability.

This 6 kW off-grid solar system can power:

  • Up to 25 LED lights
  • Fridge and freezer
  • TVs and sound systems
  • Washing machines
  • Booster pumps
  • Iron box and microwave
  • Water dispenser
  • Gaming console (PlayStation)
  • Solar water heater element (1.5 kW)
  • Wi-Fi and general household electronics

 

All in one solar heat pump systems

The All-in-One Heat Pump Solar System is a modern, energy-efficient water heating solution that combines advanced heat pump technology with solar PV compatibility. Instead of relying on direct sunlight like traditional solar water heaters, the system extracts heat from the surrounding air to heat water efficiently and reliably, day or night.

This solution is ideal for homes, apartments, hotels, hospitals, and commercial facilities seeking consistent hot water supply, reduced electricity consumption, and dependable year-round performance.


Key Advantages of Heat Pump Water Heaters Over Solar Water Heaters

  •  Weather Independence

Heat pump water heaters operate efficiently regardless of sunlight availability. They extract heat from ambient air, allowing them to perform consistently in cloudy, rainy, or cool conditions, unlike solar water heaters that depend heavily on direct sunlight.


  • Space Efficiency

Unlike solar water heaters that require large rooftop collectors, heat pump systems have a compact, all-in-one design. This makes them ideal for urban homes, apartments, and buildings with limited roof space.


  • 24/7 Hot Water Availability

Heat pumps can heat water any time of day or night, ensuring uninterrupted hot water supply. Solar water heaters are often limited to daytime operation and may require electric backup during low sunlight periods.


  • Minimal Maintenance

Heat pump systems require very low maintenance, typically limited to occasional inspections and basic filter cleaning. In contrast, solar water heaters require frequent panel cleaning, pump checks, and can be affected by dust, shading, or weather damage.

  • High Reliability in Variable Climates

Modern heat pump water heaters are designed to operate efficiently even in low ambient temperatures (as low as -7°C). Solar water heater efficiency drops significantly during cold or overcast conditions.

  • Exceptional Energy Efficiency & Solar PV Compatibility

Heat pumps achieve a Coefficient of Performance (COP) of 3–4, meaning they produce 3–4 times more energy than the electricity they consume. They can also be powered using solar PV systems, making them an excellent complement to solar power installations.

  • Sustainable & Future-Ready

By reducing electricity consumption and integrating easily with renewable energy systems, heat pump water heaters offer a long-term, environmentally friendly solution for hot water needs.

solar water heater

A 300L Non-Pressurized Solar Water Heating solution was supplied and installed at AIC Mufu Children’s Home in Runyenjes to provide reliable and sustainable hot water for daily use. The project involved the installation of two complete 300-litre systems, one serving the boys’ section and the other serving the girls’ section, ensuring equitable access to hot water for all residents.

The systems were professionally installed and commissioned by our technical team, optimized for efficient solar heat absorption and long-term durability.


System Components Installed

  • 300-litre non-pressurized solar water heater tank for consistent hot water storage
  • High-efficiency solar collector tubes designed for maximum heat absorption
  • Durable galvanized mounting structures for roof stability and corrosion resistance
  • Heat-resistant plumbing and insulation for reduced heat loss
  • Complete installation accessories and safety fittings

System Capacity & Benefits

  • Reliable hot water for bathing and cleaning
  • Improved hygiene and comfort for children
  • Reduced electricity and fuel expenses
  • Low maintenance and long service life

borehole solarization

A 5 kW borehole solarization system was supplied and installed to provide a reliable, efficient, and sustainable water pumping solution. The system harnesses solar energy to power a high-capacity borehole pump, significantly reducing dependence on grid electricity and fuel-based pumping alternatives.

The installation features a robust solar PV array paired with a hybrid solar pumping inverter and durable mounting structures. The entire system was professionally installed and optimized to ensure efficient energy conversion and consistent water delivery under varying sunlight conditions.


System components installed include:

  • Fourteen (14) 590 W high-efficiency bifacial JA Solar panels, strategically mounted to maximize solar energy generation throughout the day.
  • A 7.5 kW hybrid solar pumping inverter, designed for efficient motor control and smooth pump operation.
  • A 5 kW borehole pump motor, capable of delivering reliable water output for demanding applications.
  • Heavy-duty aluminium mounting structures for strength, corrosion resistance, and long-term durability.
  • Complete electrical protection and installation accessories for safe and stable operation.

Key features of the system:

  • 5 kW solar-powered borehole pumping system
  • Dedicated hybrid pumping inverter for efficient motor control
  • High-capacity bifacial solar array for improved energy yield
  • Reliable daytime pumping with optimized solar utilization
  • Reduced electricity and fuel operating costs
  • Low maintenance, environmentally friendly operation

10kw solar system 

A hybrid solar power system was supplied and installed to deliver reliable, efficient electricity for both household and auxiliary power needs. This installation significantly reduces reliance on grid electricity while ensuring stable power availability for essential and high-demand appliances.

The system harnesses solar energy through a high-capacity PV array, combined with battery storage and a hybrid inverter, all professionally installed and commissioned by our technical team to ensure safe operation, optimal performance, and long-term reliability.


System components installed include:

  • Ten (10) 585 W high-efficiency LONGi solar panels, strategically mounted to maximize solar energy capture throughout the day.
  • A 10 kW hybrid inverter, providing intelligent power management between solar, battery, and grid supply.
  • Two (2) 5.12 kWh lithium batteries, offering dependable energy storage for night-time use and power backup during outages.
  • Robust aluminium mounting structures and complete electrical protection accessories for durability and system safety.

This solar hybrid system supports:

  • Up to 30 LED lights
  • Automated gate system
  • Solar water heater element (1,500 W)
  • Two washing machines
  • Booster pump (1 HP)
  • Fridge and freezer
  • Iron box
  • CCTV and electric fence
  • TV, Wi-Fi, and sound system

What others say

dr george -kamakis

Borehole solarization has transformed community water access, making it seamless and efficient. By harnessing solar energy, it provides clean and reliable water, enhancing residents' quality of life and overcoming challenges of traditional methods. This advancement is key to sustainable water management and improved community well-being.

mr waithaka - mwihoko

The Solar Water Heater is an efficient, cost-effective solution for heating water in homes and businesses. By utilizing solar energy, it lowers energy bills and offers a sustainable alternative to traditional systems. Choosing a solar water heater benefits both your finances and the environment. Experience reliable and economical heating with this innovative solution.

mr john mwangi - nyeri

The 5KW energy system has made a remarkable difference, significantly reducing my energy bills. Since its installation, I've noticed a considerable drop in my monthly expenses, allowing me to allocate those savings towards other important areas of my budget. It's truly impressive how much this system has helped me lower my overall energy costs.

DESUN SOLAR SYSTEMS TEAM

dennis wanderi

CEO/Director

harisson maina

Senior Technician

Joseph ngari

 Senior Technician

simon

Senior Plumber

1000

Projects Done

25

system Types

1000

Happy Clients

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