In Beirut, a generator bill of $300 a month is no longer unusual. Residents interviewed by The National in October 2026 reported a median bill of $310, roughly Lebanon's full monthly minimum wage. Generator tariffs rose almost 60% in six months.
Behind those bills is diesel. The diesel price used in the Energy Ministry's official tariff calculations nearly doubled between late February and September 2026, according to L'Orient Today.
Meanwhile, subscribers have found an alternative. Solar produced 19% of Lebanon's electricity in 2026, up from 0.4% in 2018, according to Lebanese Center for Energy Conservation figures cited by The National. Every home that goes solar is a subscriber who needs fewer amps, or none at all.
So operators are squeezed: raise prices and lose subscribers, or find a cheaper way to make power.
The way out is not to sell less. It is to make each kWh cheaper to produce, so you can lower your price and keep your subscribers. That means running the generator less, and the sun more.
The Real Problem: Your Cost Is Diesel, Your Competitor Is the Sun
Every amp you sell is priced on what diesel costs you. When diesel jumps, your price jumps with it, and your subscriber starts comparing your bill with the price of a small solar kit.
That comparison is getting harder to win. Generator networks in the region usually run sets of 100–500 kVA, according to a study of Iraq's neighbourhood generators. Those sets burn diesel through every hour of the day, including the sunny hours and the quiet nights when demand is low.
Running at light load makes things worse. The engine uses more fuel for every kWh it sells, and long hours at low load cause wet stacking: unburned fuel and soot fouling the exhaust and injectors, which can end in a major overhaul.
The Solution: Solar by Day, Battery by Night, Generator as Backup
The operators who will keep their subscribers are the ones who change where their power comes from, hour by hour.
Daytime: solar carries the network. Solar panels supply the subscribers directly and charge the battery at the same time. The generator stays off through the sunniest hours, which in our markets are long and reliable for most of the year.
Evening and night: the battery takes over. The stored solar energy covers the evening and the low-load night hours. The generator stays off while it would otherwise be idling.
Peaks and cloudy days: the generator steps in. The generator becomes the backup, not the base. When it does run, it runs at a healthy load, charging the battery while it carries the network.
What this does to your business:
- Lower cost per kWh. Every kWh from the sun is a kWh you don't buy in diesel.
- Room to cut your price. Lower costs let you offer a better tariff, or a cheaper daytime package, and win back subscribers instead of losing them to rooftops.
- Fewer generator hours, which means fewer oil changes, longer service intervals and a longer engine life.
- Quieter nights. Field measurements near some Iraqi neighbourhood generators exceeded 100 dBA. Switching off at night is a real benefit to your neighbourhood.
What the System Looks Like
Solar panels that make the most of limited space. Roofs and land around a generator site are usually tight, so efficiency matters. The LONGi Hi-MO X10 650W uses HPBC 2.0 back-contact cells, with 24.1% module efficiency and an anti-shading design. An anti-dust version is available for dusty sites.
One hybrid inverter for solar, battery and generator. The Jebel 125KW Three Phase HV Hybrid Inverter brings all three sources together. It takes up to 200 kW of solar input across 8 MPPTs, and has a dedicated GEN port for diesel generators. It supports 100% unbalanced three-phase output, which matters on a neighbourhood network where subscribers load each phase differently. It switches between working modes within 10 ms, scales up to 10 units in parallel, and its IP66 enclosure suits outdoor sites.
A battery bank sized for your evening and night load. The Jebel 240kWh Power Cabinet is an all-in-one LFP cabinet with automatic heating and cooling, an operating range of –10°C to 55°C, and IP54 protection.
A control strategy that decides when solar, battery or generator supplies the network. The inverter supports up to nine scheduled time periods for self-consumption, battery charging and discharging, and our engineering team sets them around your actual load.
The Honest Trade-Offs
- Upfront capital. Solar and batteries cost money up front. The return depends on your diesel price, your load and how many generator hours you can replace.
- Space. You need roof or land area for the panels, close to your network.
- Sizing. Too little solar or battery, and the generator keeps running. Too much, and you pay for capacity you never use.
- Tariff rules. Where the ministry sets generator prices, plan your pricing within those rules.
What to Ask Before You Invest
- What is my load, hour by hour, in summer and winter?
- How many hours a day does my generator run at light load?
- How much roof or land do I have for solar panels?
- How much battery do I need to cover my evenings and nights?
- Can the inverter carry my peak subscriber load when the generator is off?
- How much could I lower my price once diesel use drops?
The Bottom Line
Your subscribers aren't leaving because they don't need you. They're leaving because diesel made your power too expensive. Solar and batteries let you bring the price down, keep the network running day and night, and turn the sun from a competitor into your cheapest supplier. From Lebanon, Syria and Iraq to Yemen and the mini-grids of Africa, that is how generator operators will keep their customers.
If you run a neighbourhood generator network, talk to our engineering team. Send us your load profile, and we'll show you how much of your power can come from the sun.
Nastech Solar — Home of Clean Energy.