Designed for Every Lifestyle
Discover how solar energy can seamlessly integrate into your world, no matter your needs.
Our Proven Track Record
Decades of experience and successful projects have made us a trusted leader in solar energy.
MW Worth of Projects
Latest Projects
Certifications
Expert Staff
How a hybrid solar system works
See how solar panels, battery storage, a hybrid inverter and the grid work together through the day, for systems from a small home up to 100 kWp of panels and 100 kWh of battery.
A day with hybrid solar in Nairobi
Illustration with approximate figuresModelled from public data: in November, Nairobi averages about 4.2 kWh of solar per kWp each day (Global Solar Atlas), with sunrise near 06:30 and sunset near 18:35. Grid power costs about KES 28 per kWh. Real results depend on roof, weather and habits.
13:00 · solar 2.0 kW · home 0.3 kW
- Solar produced
- ≈ 13 kWh a day
- Bought from the grid
- ≈ 2.5 kWh a day
- Home use covered by solar
- ≈ 75%
- Approximate saving
- ≈ KES 6,300 a month
About 4.7 kWh of solar a day is left over once the battery is full. It can be exported only where a net-metering arrangement is in place; otherwise a bigger battery or more daytime use puts it to work.
Assumptions behind these figures
From real data
- Solar yield for Nairobi in November: 4.23 kWh per kWp per day, the Global Solar Atlas long-term average (Solargis satellite data) at the county centre.
- No live forecast in use, so the day follows the November average. A cloudy day or the long rains produce less.
- Sunrise about 06:30 and sunset about 18:35, worked out from Nairobi's longitude. On the equator days last about 12 hours all year.
- Grid price about KES 28 per kWh (September 2026): the domestic energy charge of KES 18.57 (homes using over 100 kWh a month), about KES 4.16 in monthly pass-through charges, the REP and ERC levies and 16% VAT. Homes pay the same rate at every hour, so the hourly grid cost is simply kWh times that rate.
Assumed
- Home use follows a typical Kenyan pattern: early-morning and evening peaks and a fridge running all night. Your own bill will differ.
- Lithium battery kept between 10% and 100%, about 95% efficient each way, used before buying from the grid.
- The saving counts grid kWh avoided only. Monthly fixed charges and the cost of the system are not included.
Hourly table
Solar follows the November average for Nairobi. Grid cost is each hour's grid kWh at about KES 28 per kWh.
| Hour | Solar kW | Home kW | Grid kW | Grid KES | Battery |
|---|---|---|---|---|---|
| 00:00 | 0.00 | 0.21 | 0.00 | 0 | 13% |
| 01:00 | 0.00 | 0.21 | 0.09 | 2 | 10% |
| 02:00 | 0.00 | 0.21 | 0.21 | 6 | 10% |
| 03:00 | 0.00 | 0.21 | 0.21 | 6 | 10% |
| 04:00 | 0.00 | 0.21 | 0.21 | 6 | 10% |
| 05:00 | 0.00 | 0.30 | 0.30 | 8 | 10% |
| 06:00 | 0.00 | 0.85 | 0.85 | 24 | 10% |
| 07:00 | 0.14 | 0.77 | 0.63 | 18 | 10% |
| 08:00 | 0.52 | 0.43 | 0.00 | 0 | 12% |
| 09:00 | 1.04 | 0.30 | 0.00 | 0 | 26% |
| 10:00 | 1.56 | 0.30 | 0.00 | 0 | 50% |
| 11:00 | 1.95 | 0.30 | 0.00 | 0 | 81% |
| 12:00 | 2.10 | 0.34 | 0.00 | 0 | 100% |
| 13:00 | 1.97 | 0.30 | 0.00 | 0 | 100% |
| 14:00 | 1.60 | 0.30 | 0.00 | 0 | 100% |
| 15:00 | 1.09 | 0.30 | 0.00 | 0 | 100% |
| 16:00 | 0.56 | 0.34 | 0.00 | 0 | 100% |
| 17:00 | 0.16 | 0.47 | 0.00 | 0 | 94% |
| 18:00 | 0.00 | 0.77 | 0.00 | 0 | 77% |
| 19:00 | 0.00 | 0.85 | 0.00 | 0 | 59% |
| 20:00 | 0.00 | 0.77 | 0.00 | 0 | 43% |
| 21:00 | 0.00 | 0.60 | 0.00 | 0 | 31% |
| 22:00 | 0.00 | 0.38 | 0.00 | 0 | 23% |
| 23:00 | 0.00 | 0.26 | 0.00 | 0 | 17% |
Our Featured Products
Discover a selection of our top-rated solar panels, inverters, and batteries.
WHO WE ARE
Leading Kenya in Renewable Energy Expertise
Bills On Solar EA Limited is a premier provider of top-quality solar solutions. We stand as a beacon of innovation and reliability in Kenya’s renewable energy sector.
Professional Expertise
Unmatched skill from certified engineers.
Reliable & Affordable
Commitment to sustainable and accessible power.
Tailored Solutions
Custom designs for residential and commercial clients.
0+
Happy Clients
0k+
Capacity (KW)
THE BILLS ON SOLAR ADVANTAGE
Why We Are The Right Choice
We are committed to providing exceptional solar solutions, backed by quality, expertise, and unwavering support.
Quality Products
We source only the highest-grade solar panels and components from world-renowned brands to ensure longevity and maximum efficiency for your investment.
TRUSTED BY THE BEST
Our Partners & Collaborators
We are proud to work with leading technology brands and esteemed organizations to deliver top-tier solar solutions across Kenya.
Our Technology Partners
Organizations We Collaborate With
Your Solar JourneyStarts Here
Have a question or ready to get a quote? Fill out the form, and one of our solar experts will contact you to discuss your project.
What Our Clients Say
Loading Client Stories...
OUR INSIGHTS
Latest News from Our Solar Hub
Stay informed with our latest insights, industry news, and expert tips on renewable energy.