Generator Maintenance Lebanon: Subscriptions, Building Generators, Panels and Solar Explained

A Lebanese building typically runs on EDL, a neighbourhood generator subscription priced monthly by the Ministry of Energy and Water (a fixed fee of LL 385,000 for 5 amperes or LL 685,000 for 10 amperes, plus a published kWh price applied to a required individual meter), and often its own generator and solar. The safety priority is a changeover or automatic transfer switch that never lets two sources feed the same circuit, with proper earthing. A building generator needs servicing by running hours, consistent diesel, a ventilated room with the exhaust piped outside, and a maintenance log.

How electricity actually reaches a Lebanese building

In most countries a building has one electricity supply. In Lebanon it usually has two or three, stitched together by switches, cables and habit. Understanding that patchwork is the first step to running it safely and cheaply.

The state grid (EDL): Électricité du Liban supplies power for a limited number of hours a day, on a schedule that changes by area and by season. It is the cheapest source when it is there.
The neighbourhood generator (ishtirak): a private operator runs a large diesel generator and sells subscriptions by amperage to the buildings around it. L'Orient Today has reported that private generators have been tolerated for decades as a stopgap for EDL's structural production deficit, and the Energy Regulatory Authority has put their number at around 7,500 operators, according to the same newspaper.
The building's own generator: many buildings, villas, offices and businesses run their own diesel generator, either as the main backup or as an extra layer on top of the subscription.
Solar and batteries: since the crisis, rooftop solar with battery storage has become the fourth source in many homes and businesses, cutting the hours that diesel has to cover.

The switching between these sources, manual or automatic, is where most faults, fires and ruined appliances begin. This guide covers the subscription, the building generator, the electrical panel that ties it all together, and the maintenance that keeps the lights on.

The neighbourhood generator subscription, explained

The subscription (ishtirak) is priced by the Ministry of Energy and Water, which publishes a tariff grid every month. According to L'Orient Today's monthly coverage of these grids:

Two parts to the bill: a fixed monthly fee by subscription size, plus a price per kilowatt-hour for what you actually consume.
Fixed fees: the ministry has kept the flat monthly fee at LL 385,000 (about $4.29) for a 5-ampere subscription and LL 685,000 (about $7.64) for 10 amperes, with LL 300,000 (about $3.34) added for each extra 5 amperes above 10.
The kilowatt-hour price moves every month with the average diesel price. Through 2025 it stayed around LL 28,000 to 33,000 (roughly $0.32 to $0.37). After the war resumed in March 2026 and the regional conflict disrupted traffic through the Strait of Hormuz, the tariff rose more than 60 percent in two months, reaching LL 46,289 per kWh for May 2026 bills before starting to fall again.
Mountain and rural surcharge: operators above 700 metres or in rural areas may add 10 percent to the kWh price.
Your bill: consumption on an individual meter, which the operator is required to install, multiplied by the month's kWh price, plus the fixed fee.
Exchange rate: the ministry calculates at LL 89,700 to the dollar.

What this means in practice: your subscription bill is the fixed fee plus consumption. Reducing consumption during generator hours, not the subscription size, is what cuts the bill, and the meter is your protection. If your operator charges a flat amount with no meter, you are paying for electricity you may not be using.

Choosing the right amperage

The amperage of a subscription is a ceiling on how much you can draw at once, not how much you use. A 5-ampere subscription at 220 volts allows roughly 1,100 watts at any moment: lights, a television, a router, a fridge and a few chargers, but not an air conditioner and a water heater together. A 10-ampere subscription roughly doubles that. Before deciding:

List what must run during generator hours: fridge, lights, internet, one air conditioner, the water pump.
Add up their power ratings, remembering that motors such as fridges, pumps and air conditioners draw more at start-up.
Choose the amperage that covers the essentials, and stagger the rest.
If the breaker keeps tripping, either reduce simultaneous use or step up one level; a tripping breaker is not a fault to be bypassed.

The electrical panel: where three supplies meet

Every building that mixes EDL, a subscription and its own generator needs a changeover arrangement so that two sources can never feed the same circuits at the same time. Done properly, this is either a manual changeover switch or an automatic transfer switch (ATS) with interlocking. Done badly, with cables twisted together or two breakers that can both be on, it causes back-feeding, burnt neutrals, damaged appliances and fires.

Signs the panel needs a professional inspection:

Breakers that are warm or discoloured.
Lights that flicker or dim when a source changes.
Appliances that fail after a changeover.
Any wiring added by a previous tenant, a generator operator or an unlicensed electrician without a diagram.
Extension cords used as permanent wiring.
A changeover that depends on someone remembering to flip a switch in the right order.

Power Zone's electrical panel, circuit and safety device maintenance service covers panels, breakers, earthing and changeovers.

Owning a building generator: what you are taking on

A building or villa generator is a diesel engine, an alternator, a control panel, a fuel system, a battery and an exhaust, all expected to start on demand after sitting idle, then run for hours in heat. It is reliable only if it is maintained like the engine it is. The owners association or the owner takes on:

Fuel purchase, storage and quality.
Scheduled servicing: oil, filters, coolant, belts, batteries.
Load management so the generator is neither overloaded nor run too lightly.
Exhaust routing, ventilation and fire safety of the generator room.
Records of hours, services and faults.

A maintenance schedule for diesel generators

Intervals depend on the manufacturer, the generator's size and how many hours it runs, so the engine manual is the final word. As a framework used in practice:

Every day or every run

Check oil and coolant levels, fuel level and any leaks under the unit.
Listen for new noises and watch the exhaust colour: black means overloading or combustion problems, white or blue means other engine issues.
Note the hour meter reading.

Weekly

Run the generator under load if it has not run; a generator that only idles builds up deposits.
Check battery terminals and charge; a flat battery is the most common reason a generator fails to start.
Check the fuel tank for water and sediment at the drain.

Scheduled service by running hours

Engine oil and oil filter change at the manufacturer's interval, typically every few hundred running hours; in Lebanese conditions, with heat, dust and heavy use, many operators service more often rather than less.
Fuel filters and water separator.
Air filter, more often in dusty areas and near construction.
Coolant condition and radiator cleaning; a clogged radiator in summer means overheating and shutdown.
Belts, hoses and mounts.
Alternator and control panel checks, voltage and frequency under load.

Annually

Full load test, or a load bank test if the generator never sees its rated load.
Fuel tank cleaning and inspection.
Exhaust system, silencer and flexible joints.
Battery replacement on age, not failure.
Review of the generator room: ventilation, fire extinguisher, signage and housekeeping.

Power Zone's generator maintenance service follows a schedule like this, with a written log for every visit.

Diesel quality and storage in Lebanon

Diesel bought from different suppliers at different times varies in quality, and fuel that sits for months in a tank picks up water and grows microbial sludge. Both clog filters and injectors and are a common cause of a generator that starts, runs rough and stops. Practical rules: buy from a consistent supplier, keep tanks as full as practical to reduce condensation, drain water from the tank bottom regularly, fit a water separator, and treat long-stored fuel. The monthly ministry tariff itself is built on the average diesel price, which shows how central fuel is to the whole system.

Exhaust, carbon monoxide and the generator room

A generator engine produces carbon monoxide, an odourless gas that kills. It must never run inside a closed space connected to living areas, and its exhaust must be piped outside, away from windows, air intakes and balconies. The generator room needs permanent ventilation for cooling and combustion air, a fire extinguisher suited to fuel fires, no fuel storage beyond what is designed, and no storage of other materials. Portable generators on balconies or in stairwells are a known cause of deaths from carbon monoxide; they belong outdoors, far from openings.

The health cost of diesel generators

Generators keep Lebanon running, but their emissions are a public health problem that building owners should understand. Researchers at the American University of Beirut, led by atmospheric chemist Najat Saliba, measured pollution in Beirut and concluded, as reported by The Guardian, Now Lebanon and others, that the heavy reliance on diesel generators since the economic collapse has roughly doubled the risk of developing cancer in the city, with fine particulate levels around four times World Health Organization guidance in densely populated areas, and some emitted substances classified as category 1A carcinogens. The AUB Environment Academy's Samy Kayed has said diesel generator air pollution contains more than 40 toxic air contaminants, as reported by AP.

For an individual building, this translates into three practical measures: run the generator less by using solar and batteries where possible, keep the engine properly tuned and filtered so it burns cleaner, and route the exhaust high and away from where people breathe.

Solar and batteries: cutting the diesel hours

Rooftop solar with battery storage has become the main way Lebanese households and businesses reduce generator dependence. A well-designed system covers daytime loads from the panels, charges batteries for the evening, and uses the subscription or the building generator only when both run short. Key design points:

Load sizing: design for the essentials you want covered during outages, not everything in the building.
Battery choice: lithium batteries cost more upfront but tolerate daily cycling far better than lead-acid.
Inverter and changeover: the inverter must integrate safely with EDL, the subscription and the generator, with the same rule: no two sources on the same circuit at once.
Roof condition: panels need a sound, waterproof roof and secure mounting against wind.
Maintenance: panel cleaning, battery monitoring and periodic electrical inspection.

Power Zone provides solar system installation and maintenance and solar panel cleaning.

Voltage fluctuations: why appliances die in Lebanon

Every changeover between EDL, the subscription and a generator is a moment of unstable voltage, and neighbourhood generators under heavy load often deliver low or fluctuating voltage for hours. Compressors in fridges and air conditioners, water heaters, pumps and electronics suffer most. Protection is cheap compared with replacement:

Voltage stabilisers for air conditioners, fridges and large appliances.
Surge protection at the panel and for electronics.
Delay relays on compressors so they do not restart instantly after a cut.
A small UPS for the router, computers and anything that cannot drop for a second.
Switching off heavy loads before a known changeover when the schedule is predictable.

Earthing and residual current protection

Many Lebanese buildings have poor or missing earthing, and generators added over the years are often not bonded to the building's earth at all. Without proper earthing and residual current devices (RCDs), a fault in a water heater or a pump can energise metal parts and water. Any electrical work on generators, panels or heaters should include a check of earthing and RCD protection. This is part of Power Zone's electrical inspections and compliance checks.

Dealing with the generator operator

Your relationship with the neighbourhood operator is a commercial one, and the ministry's rules give you a few levers:

A meter is required. Bills should be based on metered consumption at the published kWh price plus the fixed fee.
The tariff is public. The ministry publishes it monthly; L'Orient Today reports each grid. Compare your bill with it.
Mountain and rural surcharge is 10 percent, not more.
Cut-off hours and schedules should be stated; ask for them in writing.
Keep bills and meter photos each month; disputes are easier with records.

In late 2025 the government launched a campaign to regulate generator operation more strictly and control prices, as L'Orient Today reported. Rules can change, so check the latest ministry grid rather than relying on old numbers.

Running a fridge, air conditioner and pump on generator power

Fridges: keep doors closed during cuts; a full fridge holds cold longer. A delay relay protects the compressor on reconnection.
Air conditioners: inverter units draw less at start-up and run better on limited amperage. Set 24°C to 26°C rather than fighting the heat with the lowest setting.
Water pumps: pumping water to roof tanks during generator hours is often the single largest load. Fit a float switch and dry-run protection, and time pumping for EDL hours when possible.
Water heaters: use timers so they heat during EDL hours, or switch to solar water heating.

Lighting and small loads

Replacing old bulbs with LEDs cuts lighting load several times over, which matters when every watt during generator hours is paid at diesel prices. Switch off standby loads, unplug chargers, and use power strips with switches. These habits cost nothing and show up in the subscription bill the same month.

Businesses: keeping the shop open through the cuts

For restaurants, shops, clinics and offices, electricity is revenue. A business plan for power includes: a list of critical loads (payment terminals, internet, fridges and freezers, medical equipment, lighting), a UPS for the critical electronics, a generator or subscription sized for the critical loads, solar where the roof allows, and a maintenance contract so the generator does not fail on a Saturday night. Restaurants add the cold chain: freezer and fridge temperatures should be logged, and a generator failure in summer is a food safety incident, not just an inconvenience.

Residential buildings and the committee

A shared building generator is a shared responsibility. The committee should define who operates it, how fuel is bought and accounted for, the amperage allocated to each apartment, the service schedule and the contractor, and what happens when someone does not pay. Many building disputes in Lebanon start with the generator. Clear rules and a maintenance log keep it a utility rather than a battleground.

Old wiring, new loads

Apartments wired in the 1970s and 1980s were not designed for today's air conditioners, water heaters and pumps, let alone for switching between three supplies. Undersized cables, old breakers and overloaded sockets heat up quietly behind walls. If your building has had generators and subscriptions added over decades without a rewiring, an electrical inspection is overdue. See our Beirut plumbing guide for the parallel story in pipes; the two often need fixing together.

Buying or renting a generator: sizing and choice

Size for the real load with margin for motor start-up, not for every appliance at once.
Prefer a unit that runs at 60 to 80 percent of its rating most of the time; chronic light loading damages diesel engines.
Silenced canopy in residential areas, for noise and weather protection.
Automatic start and transfer if nobody is on site to switch manually.
Service availability: choose brands with parts and technicians available in Lebanon.
Used generators need a full inspection: hours, compression, alternator insulation and the control panel.

Noise

Generators in dense neighbourhoods run for hours under windows. A silenced canopy, proper mounts, a good silencer and a correctly routed exhaust reduce noise substantially. A generator that has become louder is usually telling you about a loose panel, a worn mount or an exhaust leak, which is also a safety issue.

Manual changeover: the sequence that protects your equipment

Where the changeover is manual, the order matters. When EDL cuts: switch off heavy loads such as air conditioners, the water heater and the pump; start the generator or wait for the subscription; let the voltage stabilise for a minute; then bring loads back one at a time, largest last. When EDL returns: switch heavy loads off again, transfer to EDL, let it settle, then reconnect. Flipping the changeover with every load connected is what sends a surge through compressors and electronics. An automatic transfer switch with a start delay and a load-shedding relay does this sequence for you, which is why it pays for itself in appliances saved.

Generator plus batteries: running fewer hours

A building generator does not have to run every minute the grid is off. Pairing it with a battery bank and inverter lets the generator run a few hours at a good load to charge the batteries and cover peaks, then shut down while the batteries carry the lighter loads. The engine runs fewer hours, closer to its efficient load, burns less diesel per useful kilowatt-hour, and the building is quieter at night. Solar panels charge the same batteries by day. The design has to respect the same interlocking rule as any changeover, and the batteries need the right ventilation and protection.

Generator rooms in new buildings and renovations

If you are building or renovating, the generator room is cheaper to get right now than to fix later. It needs: a location away from bedrooms and air intakes, fresh air inlets and a hot air outlet sized for the engine, an exhaust route to a safe height with flexible joints, a fuel tank with bunding against spills and a separate fill point, fire-rated construction and an extinguisher, a drain, lighting, a cable route to the main panel with the changeover, and enough space to service the engine on all sides. Many Lebanese generator rooms are converted storerooms with none of this, which is why they overheat, flood and, occasionally, burn.

If the generator catches fire or diesel spills

Shut the generator down from the emergency stop if it is safe to reach, cut the fuel supply, use the extinguisher only on a small fire, and call the fire service for anything larger. Never use water on a fuel fire. For a spill, stop the source, keep ignition away, contain with sand or absorbent, and ventilate. Afterwards, the room and the generator need inspection before the generator runs again.

What drives the cost of generator maintenance

Quotations vary with the generator's size, its age and condition, the hours it runs, how accessible the room is, whether parts are stocked locally, and whether the contract includes emergency response. A maintenance contract priced per visit with parts listed separately is easier to compare than a lump sum. The expensive events, a seized engine, a burnt alternator, a failed control panel, are almost always the result of missed basic servicing, which is why the cheapest option is usually the scheduled one.

Reading the hour meter like a professional

The hour meter on the generator is the single most useful number in the room. Divide fuel delivered by hours run and you have consumption per hour; a sudden rise means a leak, a fault or diesel going somewhere else. Compare hours between service visits and you know whether the schedule is being respected. Note the hours at every start of the month and every service, and the pattern of the building's electricity life becomes visible: how many hours a day the generator really covers, which is also the number that tells you how much solar and batteries would save.

Owners associations that publish the monthly hours and fuel figures to residents also find that disputes about the generator fall away, because the numbers, not the operator, do the explaining.

Common generator faults and what they mean

Will not start: flat battery, bad connections, no fuel, air in the fuel line, failed starter.
Starts then stops: fuel starvation from clogged filters or water, low oil pressure shutdown, overheating.
Black smoke: overload, dirty air filter, injector problems.
Hunting or unstable speed: governor or fuel delivery problems.
Low or unstable voltage: alternator or regulator faults, or overload.
Overheating: clogged radiator, low coolant, failed fan belt, poor room ventilation.
Tripping on transfer: overload at changeover or a wiring fault.

Preparing the generator for summer and winter

Before summer: clean the radiator, check coolant and fan, check room ventilation, service filters, and test under full load, because summer is when air conditioners push the generator hardest and heat pushes the engine. Before winter: check the battery, which struggles in cold, check fuel for water, check heaters where fitted, and ensure the exhaust and canopy keep rain out.

Keeping records

A single log, with dates, hour meter readings, services, parts, fuel deliveries and faults, is the best tool for lowering generator costs. It shows fuel consumption per hour, which reveals leaks and theft; service intervals that are being missed; and recurring faults that point to a deeper cause. For owners associations, it also settles arguments.

Choosing an electrical and generator contractor in Lebanon

Experience with changeovers and transfer switches, not just with the engine.
Diagnosis before parts, and a written report after every visit.
Earthing and RCD checks included in panel work.
A service schedule tied to running hours, with the manufacturer's manual as reference.
Emergency response for breakdowns, with defined hours.
One company for generator, panel, solar and lighting, so nobody blames the other trade.

Common mistakes with generators and subscriptions

Bypassing the breaker

Replacing a tripping breaker with a bigger one or a wire does not fix the overload; it removes the only thing preventing a fire.

Running a generator with no load, or with everything

Both damage the engine and the alternator. Match the load to the rating.

Ignoring the battery

The battery is the part most likely to fail and the cheapest to replace on schedule.

Mixing sources in the panel

Any arrangement where two sources can feed the same circuit at once is dangerous, whatever the electrician said.

Buying cheap diesel

Fuel problems are the most common cause of running faults.

No records

Without hours and service dates, every fault is a surprise.

A quick checklist for every building

Changeover or ATS with interlocking, and a wiring diagram on the panel door.
Earthing and RCDs tested.
Generator serviced on hours, with a log.
Exhaust piped outside, room ventilated, extinguisher present.
Fuel from a consistent supplier, tank drained of water.
Stabilisers and surge protection on sensitive loads.
Subscription bill checked against the ministry grid, meter photographed monthly.
Solar and batteries assessed to cut diesel hours.

Generators, electricity and solar with Power Zone in Lebanon

Power Zone operates in Lebanon from its office in Mneimneh Building, 5th Floor, Verdun, Beirut, as Power Zone s.a.r.l, registered at the Commercial Register in Beirut and with the Ministry of Finance under registration No. 4090537. In Lebanon, Power Zone builds on Zone 15, the cleaning services brand many clients already know; you can read more on our About page.

Our electrical, generator and solar services cover generator maintenance, electrical panels and changeovers, electrical installation and repairs, inspections and energy assessments, solar systems, solar panel cleaning and lighting. Every job follows the same path: your request, a site visit, a clear quotation you approve before work starts, the work itself, and handover with a report. Request a visit.

Frequently asked questions

How is the generator subscription bill calculated in Lebanon?

The Ministry of Energy and Water publishes a tariff grid every month. The bill is a fixed monthly fee by amperage, LL 385,000 for 5 amperes and LL 685,000 for 10 amperes with LL 300,000 for each extra 5 amperes, plus the month's kWh price multiplied by consumption on an individual meter the operator must install.

Why did generator prices jump in 2026?

The tariff follows the average diesel price. After the war resumed in March 2026 and the regional conflict disrupted traffic through the Strait of Hormuz, the kWh price rose more than 60 percent in two months to LL 46,289 for May 2026 bills, then started falling as diesel prices eased, according to L'Orient Today.

What amperage subscription do I need?

Amperage is a ceiling on simultaneous use. A 5-ampere subscription allows roughly 1,100 watts at once, enough for lights, fridge, internet and chargers. Air conditioners, water heaters and pumps need more or must be staggered. If the breaker trips, reduce simultaneous loads or step up one level; never bypass it.

Can the generator operator charge more in mountain areas?

Yes, operators above 700 metres or in rural areas may add 10 percent to the published kWh price, according to the ministry's grids reported by L'Orient Today.

What is a changeover or automatic transfer switch?

A switch that connects your circuits to one source at a time, EDL, subscription or generator, so two sources can never feed the same circuit. It is the most important safety device in a Lebanese electrical panel.

How often should a diesel generator be serviced?

By running hours, following the manufacturer's manual: oil and filters typically every few hundred hours, with weekly battery and fuel checks, daily level checks when running, and an annual full load test, fuel tank cleaning and exhaust inspection.

Why does my generator start and then stop?

Usually fuel starvation from clogged filters or water in the diesel, a low oil pressure shutdown, or overheating from a clogged radiator or poor ventilation.

Is it safe to run a generator on a balcony or in a stairwell?

No. Generator exhaust contains carbon monoxide, which is odourless and lethal. Generators must run outdoors or in a ventilated generator room with the exhaust piped outside, away from windows and air intakes.

How bad is generator pollution for health?

AUB researchers led by Najat Saliba found that Beirut's reliance on diesel generators since the economic collapse roughly doubled cancer risk, with fine particulates around four times WHO guidance in dense areas. Running generators less, keeping them tuned and routing exhaust away from people all help.

Why do appliances fail in Lebanon?

Voltage fluctuations during changeovers and under heavily loaded generators damage compressors and electronics. Stabilisers, surge protection, delay relays on compressors and a UPS for electronics prevent most failures.

Does solar replace the generator?

It reduces the hours the generator must run by covering daytime loads and charging batteries for the evening. Most systems still keep a subscription or generator for long outages and cloudy days.

What should the building committee decide about the generator?

Who operates it, how fuel is bought and accounted for, the amperage per apartment, the service schedule and contractor, the maintenance log, and what happens when someone does not pay.

What does black smoke from a generator mean?

Overload, a dirty air filter or injector problems. It wastes fuel and signals a fault that needs attention.

Which diesel should I buy for the generator?

Buy from a consistent supplier, keep tanks reasonably full to limit condensation, drain water from the tank bottom regularly, fit a water separator and treat fuel that will be stored for months.

Does Power Zone maintain generators in Lebanon?

Yes. Power Zone provides generator maintenance, electrical panel and changeover work, electrical repairs, inspections, solar installation and maintenance, solar panel cleaning and lighting across Lebanon from its office in Verdun, Beirut.

How do I request generator or electrical work from Power Zone?

Send a request through the contact page or WhatsApp describing the generator or the fault. We arrange a visit and send a clear quotation for your approval before work starts.

Generators and backup power in Lebanon: the complete guide