Solar Panels Lebanon: Sizing, Batteries, Inverters, Law 318/2023, Net Metering and Safety

Lebanon installed solar at extraordinary speed, with estimates of 1,000 to 1,500 MW of distributed capacity by 2023. A good system starts from your real loads and the season you need it for: in Beirut one kilowatt of panels averages roughly 8.6 kWh a day in summer but only about 3.3 kWh in winter. Choose batteries built for daily cycling, an inverter sized for motor surges, engineered frames that protect the roof waterproofing, and full DC protection, earthing and labelling. Law 318/2023 gives net metering and shared arrangements a legal basis, and because Lebanon requires no certification for solar companies, the installer's design and documentation matter.

Why solar in Lebanon is different

In most countries, rooftop solar is a way to lower an electricity bill. In Lebanon it became a way to keep the lights on. As state electricity collapsed to a few hours a day and generator tariffs followed diesel prices, households, shops, factories and municipalities installed solar at a pace few markets have seen. Estimates of how much differ, which is itself a sign of how informal much of the boom has been: the Lebanese Center for Policy Studies cites the Lebanese Center for Energy Conservation's estimate of about 1,000 MW of decentralised solar by June 2023; the World Energy Council's Lebanon committee estimates about 1,500 MWp by the end of 2023; and a Ministry of Energy and Water presentation to ESCWA puts the figure at around 1,200 MW. A spatial assessment published by the Ministry of Environment with UNDP mapped a minimum of 241,298 PV units across Lebanon by 2023.

That speed came with problems. Systems were sized in a hurry, batteries chosen on price, panels bolted through waterproofing on shared roofs, and inverters wired into homes that also switch between state power and a generator. This guide explains how to size, install, protect and maintain a solar system that works in Lebanese conditions: how much sun you can expect, which system type fits, how batteries and inverters should be chosen, what to agree with your building, what Law 318/2023 changes, how to keep the system safe, and how to choose an installer.

How much sun does Lebanon get?

Lebanon is a strong solar location, but output changes a lot through the year. Profile Solar's analysis for Beirut estimates average daily output per kilowatt of installed panels at about 8.62 kWh in summer, 7.00 kWh in spring, 5.23 kWh in autumn and 3.31 kWh in winter, and recommends a fixed tilt of about 29° facing south for the best yearly total. In other words, the same system produces roughly two and a half times as much on an average summer day as on an average winter day. The Ministry of Environment and UNDP assessment used the World Bank Group's Global Solar Atlas irradiation data and noted that some districts receive around 2,000 kWh/m² of global horizontal irradiation per year.

Two practical consequences follow. First, a system sized only on summer output will disappoint in winter, exactly when days are short and heaters run. Second, the real output of any roof depends on shading from neighbouring buildings, water tanks and stairwell rooms, on orientation and tilt, on dust and soot, and on heat, so the seasonal figures above are a guide, not a promise for a specific roof.

The three system types

Grid-tied with net metering

Panels and an inverter feed the building and, under net metering, export surplus to the EDL grid. This is the cheapest and simplest configuration where the grid is reliable, but in Lebanon state power is available only part of the day, and a grid-tied system without batteries is not designed to supply the home during cuts. Confirm with the installer how the specific inverter behaves when the grid is off.

Hybrid with batteries

The most common configuration in Lebanese homes. Panels charge batteries and supply loads during the day; batteries supply loads during the evening and cuts; state power or the generator can charge batteries or carry loads when solar is low. A hybrid inverter manages the sources. This is the most flexible option and also the one with the most to go wrong if components do not match.

Off-grid

Fully independent systems, usually in remote houses, farms, pumping stations or mountain properties without reliable supply. They need larger battery banks and careful winter sizing, often with a generator as backup.

Sizing a system for a Lebanese home

Good sizing starts with what you actually use, not with how many panels fit on the roof. A practical sizing process:

List the loads: fridge, lighting, router, TV, water pump, washing machine, water heater, AC units, chargers. Note each appliance's rated power from its label.
Estimate daily energy: power multiplied by hours of use gives watt-hours per day. Add them up, separately for daytime and evening.
Decide what solar must cover: all daytime loads, the evening essentials, or everything including AC.
Size the panels for your season: divide the daily energy you want from solar by the expected daily output per kW for the season you care about, then allow for system losses.
Size the batteries for the evening and night energy you want to store, using the usable capacity the manufacturer specifies, not the nameplate figure alone.
Size the inverter for the largest combination of loads that will run at once, including the start-up surge of motors such as pumps, fridges and fixed-speed ACs.

A worked example using Profile Solar's Beirut figures: a 5 kW array would produce roughly 5 × 8.62 ≈ 43 kWh per day on an average summer day and 5 × 3.31 ≈ 16.6 kWh per day on an average winter day, before the effects of shading, dust and losses on a specific roof. If your evening essentials use 6 kWh, that energy has to come from batteries charged during the day, so the winter day must produce enough for daytime loads and battery charging together. This is an illustration of the method, not a design: a proper design uses your real loads and roof.

What solar saves against the generator

Every kilowatt-hour your solar system supplies during generator hours is a kilowatt-hour you do not buy from the generator. L'Orient Today reported the Ministry's generator tariff for May 2026 as LL 46,289 per kWh, with the Ministry calculating on an exchange rate of LL 89,700 per dollar, which is about $0.52 per kWh. At that tariff, 10 kWh of solar energy used instead of generator energy would be worth about LL 462,890, or roughly $5.16, on that day. Tariffs change monthly and the saving only counts for energy you actually use, so treat this as a way to compare options rather than a forecast. Solar can also reduce the generator subscription size you need, which lowers the fixed monthly fee; our generators and backup power guide explains how subscriptions and fees work.

Batteries: where most problems start

The Badil, a Lebanese outlet, reported fires and battery explosions linked to faulty solar installations, and quoted experts noting that low-cost lead-acid batteries are not built for the heavy charge and discharge cycles of solar systems, and that acid and gel batteries have a much shorter lifespan than lithium. Whatever chemistry you choose:

Match the battery to daily cycling: solar batteries are charged and discharged every day; choose batteries designed for that duty.
Respect the usable capacity and depth of discharge the manufacturer specifies; regularly draining batteries beyond it shortens their life.
Match batteries to the inverter: voltage, charging profile and, for lithium, communication with the battery management system.
Do not mix old and new batteries, different brands or different chemistries in one bank.
Install them properly: a dry, ventilated, shaded place, away from bedrooms, fuel, gas cylinders and flammable materials, with protected terminals and correctly sized cables and fuses.
Watch for warning signs: swelling, leaks, unusual heat or smell mean disconnect and replace.

Inverters: sizing, surge and heat

The inverter is the heart of a hybrid system and the component most stressed in Lebanese conditions. It must handle the continuous load and the start-up surge of motors, cope with switching between state power and the generator, and survive summer heat. Install it in a ventilated place out of direct sun, never inside a closed cupboard, with clearance around it as the manufacturer specifies. The Badil also noted that high voltage can overload inverters and cause electrical fires, which is one more reason to keep the system within its ratings and to protect it properly. If you plan to run air conditioning on solar, read our Lebanon AC guide on inverter ACs and battery limits.

The roof: shared space, tanks and waterproofing

Most Lebanese apartments share a flat roof with their neighbours, and that roof already carries water tanks, stairwell rooms, satellite dishes, AC outdoor units and sometimes generator equipment. Before installing solar on a shared roof:

Agree with the building: which part of the roof each apartment may use, where cables run down the building, and who is responsible if the roof membrane is damaged. Put it in writing with the building committee.
Map the shading: tanks, walls and neighbouring buildings cast shadows that move through the day and seasons; even partial shading of one panel can reduce a whole string's output.
Protect the waterproofing: frames that are bolted through the roof membrane without proper sealing are a common cause of leaks into top-floor apartments. Use ballasted frames where suitable, or sealed fixings with proper flashing, and inspect them after the first rains. Our waterproofing guide explains roof penetrations in detail.
Design for wind: panels act like sails; frames must be engineered and anchored for coastal and mountain winds.
Plan for snow in mountain homes: frames and tilt that shed snow, and panels that can carry the load.
Keep access: leave paths to water tanks, drains and other equipment so they can still be serviced.

Law 318/2023 and net metering

Lebanon's Distributed Renewable Energy Law, Law No. 318/2023, was ratified by Parliament on 14 December 2023. According to the summary in UNEP's legal database, the law sets principles for projects using net metering in its individual, multiple-tenant and collective forms, allows peer-to-peer renewable energy trading between private parties through direct power purchase agreements or equipment leasing, caps such trading at ten megawatts, gives the Electricity Regulatory Authority responsibility for monitoring and a renewable energy database, and creates a dedicated renewable energy directorate within EDL. The Lebanese Center for Policy Studies notes that EDL first introduced a net metering mechanism in 2011 through circular 32-318, and that implementation of the new law faces obstacles, including the delay in appointing the regulator's members and the need to strengthen EDL's billing system.

In practice, for a household or building: net metering and shared arrangements for multi-tenant buildings now have a legal basis, but how they work for a specific connection depends on EDL procedures and the implementing framework. Check the current requirements with EDL before designing a system around exporting surplus energy.

Safety: what every solar installation needs

A solar system adds direct-current circuits, large batteries and another source of power to a home that may already switch between state electricity and a generator. A safe installation includes:

DC protection: correctly rated fuses or breakers and isolators on the panel strings and the battery bank.
Correct cable sizes for the currents involved, with UV-resistant cable on the roof and protected cable runs down the building.
Earthing of panel frames, mounting structure and inverter, as the manufacturer and good practice require.
Surge protection, especially for exposed roofs and mountain homes.
A safe changeover between solar, state power and generator that prevents sources feeding each other.
Clear labelling and isolation points so anyone, including Civil Defence, can switch the system off.
RCD protection on the AC circuits the system supplies.

Our electrical safety guide covers RCDs, earthing and changeover in detail, and our panel and safety device maintenance service checks the AC side of the installation.

Dust, soot and panel cleaning

Panels in Lebanese cities collect dust, pollen, bird droppings and, near generators and busy roads, soot. Researchers at the American University of Beirut have linked heavy reliance on diesel generators to high levels of fine particulate pollution in Beirut, and the same particles settle on panels. Dirty panels produce less, so cleaning is part of the system's economics. Clean according to the panel manufacturer's instructions, typically with soft brushes and clean water, avoid abrasive products and high-pressure jets that can damage surfaces and seals, never walk on panels, and clean in the early morning or evening when panels are cool. On high or steep roofs, cleaning is a job for a team with safe access. Our solar panel cleaning service covers homes, buildings and commercial roofs.

Shops, offices, clinics and factories

Businesses use most of their energy during daylight hours, which suits solar well. Shops and offices run lighting, AC, refrigeration and computers through the working day; clinics and pharmacies need refrigeration and steady power; workshops and factories run motors and compressors. A commercial design starts from a load profile across the day, separates critical loads that must never stop from loads that can wait, sizes inverters for motor starts, and often uses solar to reduce generator running hours rather than to replace the generator entirely. For larger sites, monitoring that shows production, consumption and battery state by hour is essential to manage costs. Our energy assessments establish the load profile before design.

Solar water heating versus PV for the water heater

Electric water heaters are one of the largest loads in Lebanese homes. There are two ways to use the sun for hot water: a solar thermal collector that heats water directly, or PV panels that power an electric water heater. Solar thermal is a dedicated, efficient way to heat water and does not draw on your batteries; using PV means the water heater competes with every other load for solar energy and battery capacity. If you already have a PV system, put the electric water heater on a timer so it runs during peak sun hours, not in the evening from batteries or the generator.

Expanding or upgrading an existing system

Many early Lebanese systems were installed in a rush and are now being expanded with more panels or batteries. Before adding anything, check that the inverter can accept more panel capacity within its limits, that new batteries match the existing bank in chemistry, voltage and age or will form a separate bank, that existing cables and protection devices are rated for the higher currents, and that the roof frames and waterproofing can take the extra load. Adding panels to an inverter that cannot use them, or new batteries to an old bank, wastes money and can create safety problems.

Monitoring: know what your system is doing

Most modern inverters provide a display or an app showing daily production, consumption and battery state. Checking it regularly reveals problems early: a sudden drop in production can mean dirty panels, a shading change, a failed string or a tripped breaker; batteries that empty faster than before can mean ageing cells or a new load. Keep a simple record of monthly production; comparing the same month year on year is the clearest way to spot degradation.

Warranties and documents to keep

Keep the datasheets and warranty terms for panels, inverter and batteries, the installer's design and wiring diagram, the itemised invoice, and photos of the installation before covers and trunking are closed. Panel, inverter and battery warranties have different lengths and conditions set by each manufacturer, and many require installation according to their instructions; without documents, a claim becomes difficult. For rented properties and shared roofs, keep the written agreement with the owner or building committee with these records.

Birds, pests and debris under panels

The space under roof-mounted panels is sheltered and shaded, which attracts pigeons and other birds, and collects leaves and debris. Nests and droppings damage cables, block drainage and dirty the panels. Mesh guards around the panel edges, clearing debris during cleaning, and keeping cable runs tidy and protected reduce the problem. Our Lebanon pest control guide covers the wider pest picture on Lebanese roofs.

Municipalities, schools and shared energy

Solar is not only a household decision in Lebanon. A Carnegie Endowment paper on local governance and the energy transition argues that Law 318/2023 provides a legal mechanism for municipalities to create local energy communities, and that municipal planning can coordinate decentralised solar for public buildings, water and agriculture. For schools, clinics, municipal buildings and water stations, solar can cut diesel costs and keep essential services running during cuts, but these sites need the same discipline as any commercial project: a real load profile, protected and labelled installations, secure frames, monitoring and a maintenance budget, so that the system still works years after the ribbon is cut.

Solar in rented apartments

Tenants increasingly install their own solar systems, especially small hybrid systems for lighting, fridge and router. Before investing, agree in writing with the owner where panels, batteries and cables may go, who pays for any roof repair, and whether the system stays or leaves at the end of the lease. Choose mounting and cabling that can be removed without damaging the roof or façade, keep the battery bank somewhere safe and ventilated inside the apartment, and keep all receipts and warranties in your name. For owners, a properly documented system can add value to a rental; an improvised one adds risk.

Winter and mountain homes

Mountain homes face the hardest solar conditions: the shortest and cloudiest days arrive with the highest heating needs, snow can cover panels for days, and long supply lines bring voltage problems. A mountain system needs winter-based sizing, frames and tilt that shed snow, panels rated for the snow load, surge protection, and a realistic plan for heating that does not rely on batteries alone. For many mountain homes, the best result combines solar for lighting, fridge, pumps and electronics with a generator or other heating source for the coldest weeks, and good insulation to reduce what has to be heated in the first place.

Solar and the generator working together

For most Lebanese homes and businesses, the realistic goal is not to abandon the generator but to make solar and the generator work as a team. A well-integrated system uses solar first during the day, lets batteries carry the evening, and uses the generator or state power only to top up batteries or carry heavy loads when solar is not enough. To get there, the inverter's charging settings should be configured so the generator charges batteries efficiently instead of running for hours at low load, the changeover arrangement must keep the generator, state power and solar from feeding each other, and heavy loads such as water heaters, pumps and washing machines should be scheduled into the sunniest hours. A household that does this can often reduce its generator subscription or running hours, which lowers both the fixed fee and the energy charge.

Questions to ask before you sign

What daily energy will this system produce in winter and in summer on my roof, and how did you calculate it?
What is the usable battery capacity, and how many evening hours of my essential loads will it cover?
What surge can the inverter handle, and which of my appliances can run together?
How will the frames be fixed, and how will you protect the roof waterproofing?
Which DC and AC protection devices are included, and where are the isolators and labels?
How does the system connect to my generator and state power, and who checked the changeover?
What do the warranties cover, for how long, and who handles a claim?

A maintenance calendar for Lebanese solar systems

When	What to do
Monthly	Check the inverter display or app for errors and output; look at panels for dirt and damage; check that the battery area is dry, ventilated and clear
Every 1 to 3 months	Clean panels, more often near generators, roads, construction or the sea
Spring	Full inspection before summer: connections, DC protection, battery health, inverter ventilation, frame fixings
Autumn	Check roof penetrations and drainage before the rains; clear leaves and debris; check surge protection
After storms, snow or damage	Inspect frames, panels and cables before relying on the system again

After war damage, fires or long shutdowns

The Ministry of Environment and UNDP spatial assessment also assessed solar installations damaged in the South and Beirut's southern suburbs during the 2023 to 2024 war. Any system that has been hit by debris, blast pressure, fire or water, or that has been left disconnected for months, should be inspected before it is switched back on: cracked panels, damaged cables, loosened frames and batteries that have been deeply discharged or overheated can all be dangerous. Reconnect step by step, battery bank and strings checked first, and watch for heat, smell or faults in the first days.

What a solar system costs

Prices in Lebanon depend on panel, inverter and battery brands, battery chemistry and capacity, roof conditions, frames, cabling distance and installation quality. For historical context, the Lebanese Center for Energy Conservation's 2019 solar PV status report recorded the average turnkey price falling from $7,186 per kWp in 2011 to $935 in 2019; prices since then have moved with the crisis and global markets. Rather than comparing a single price per system, ask for itemised quotations that list each component's brand and model, battery usable capacity, inverter rating, protection devices, frame type, cabling and warranty, so quotations can be compared like for like.

Common solar mistakes in Lebanon

Sizing on summer output

Winter days can produce well under half of summer output; size for the season that matters to you.

Choosing batteries on price alone

Batteries not built for daily cycling fail early, and poor batteries are linked to fires.

Undersized inverters

Motor start-up surges and combined loads trip or damage inverters that are too small.

Drilling through the roof membrane

Unsealed fixings leak into the apartment below, often months later.

No DC protection or labelling

Without isolators and labels, nobody can safely switch the system off in an emergency.

Never cleaning or checking

Soot, dust and loose connections steadily reduce output and raise risk.

How to choose a solar installer in Lebanon

The Badil noted that there is no required certification process for solar PV companies operating in Lebanon, so the choice of installer matters even more. Look for:

A load assessment and roof survey before any quotation.
Itemised quotations with brands, models and ratings for every component.
A design that includes protection: DC fuses or breakers, isolators, surge protection, earthing and labelling.
Proper roof work: engineered frames, sealed or ballasted fixings, and respect for the waterproofing.
Warranties in writing for panels, inverter, batteries and workmanship, and who handles claims.
After-sales service: monitoring, cleaning and maintenance, not only installation.
Electrical knowledge beyond solar: changeover with the generator and state power is part of the job.

Solar systems in Lebanon with Power Zone

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 services brand many clients already know; read more on our About page.

We provide solar system installation and maintenance, solar panel cleaning, generator maintenance, panel and safety device maintenance, electrical inspections and energy assessments and waterproofing for the roof. Every job follows the same path: your request, a load assessment and roof survey, a clear itemised quotation you approve before work starts, the installation, and handover with a written report. Request a solar assessment.

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Frequently asked questions

How much solar does Lebanon have?

Estimates differ: the Lebanese Center for Energy Conservation estimated about 1,000 MW of decentralised solar by June 2023, the World Energy Council's Lebanon committee about 1,500 MWp by end of 2023, and a Ministry of Energy and Water presentation around 1,200 MW.

How much electricity does one kilowatt of panels produce in Beirut?

Profile Solar estimates about 8.62 kWh per day per kW in summer, 7.00 in spring, 5.23 in autumn and 3.31 in winter, before the effects of shading, dust and losses on a specific roof.

What tilt should solar panels have in Lebanon?

Profile Solar recommends a fixed tilt of about 29° facing south in Beirut for the best yearly output; roof constraints and shading may change the best choice for a specific building.

Do I need batteries in Lebanon?

For most homes, yes. State power is available only part of the day, so a system that must supply the home during cuts and evenings needs batteries, usually in a hybrid configuration.

Which batteries are best for solar in Lebanon?

Choose batteries designed for daily cycling and matched to your inverter. Lebanese reporting quotes experts saying low-cost lead-acid batteries are not built for heavy solar cycling and that acid and gel batteries last much less than lithium.

How do I size a solar system?

List your loads and daily energy use, decide what solar must cover, size panels for the season you care about, size batteries for evening and night use from their usable capacity, and size the inverter for combined loads and motor surges.

Can I run my air conditioner on solar?

Yes, mainly during the day, with an inverter AC and an inverter sized for the load. Running AC into the evening drains batteries quickly; pre-cooling in the afternoon works better.

What does Law 318/2023 do?

It gives net metering in individual, multiple-tenant and collective forms a legal basis, allows peer-to-peer renewable trading between private parties up to ten megawatts, and assigns monitoring to the regulator and implementation to a new EDL directorate.

Can I sell my solar surplus to EDL?

Net metering has a legal basis under Law 318/2023 and EDL introduced net metering in 2011, but how it works for a specific connection depends on EDL procedures. Check current requirements with EDL before designing around exports.

Can I install solar on a shared building roof?

Yes, with the building's agreement. Agree in writing which area you may use, where cables run, and who is responsible for the waterproofing, and avoid shading neighbours' panels.

Will panels damage my roof?

Only if installed badly. Unsealed fixings through the membrane cause leaks. Use engineered ballasted or sealed fixings with proper flashing, and inspect them after the first rains.

Is solar dangerous?

A properly designed system is safe. Lebanese reporting links fires to faulty installations, poor batteries and overloads, so DC protection, correct cables, earthing, labelling and quality components matter.

How often should solar panels be cleaned?

Typically every one to three months in Lebanese cities, more often near generators, busy roads, construction or the sea. Use soft brushes and clean water, avoid high-pressure jets, and never walk on panels.

How much does a solar system cost in Lebanon?

It depends on components, battery capacity, roof and installation. For context, LCEC recorded turnkey prices falling from $7,186 per kWp in 2011 to $935 in 2019. Compare itemised quotations, not single prices.

Does Power Zone install solar systems in Lebanon?

Yes. Power Zone designs, installs and maintains solar systems in Lebanon, including panel cleaning, electrical protection, generator integration and roof waterproofing.

How do I request a solar assessment?

Send a request through the contact page or WhatsApp with your location, roof type, current generator subscription and main loads. We arrange a load assessment and roof survey and send an itemised quotation for approval.

Solar systems in Lebanon: the complete guide