A bridge between European expertise and Ukraine's energy
Solet Ukraine is a subsidiary of Lithuania's SOLET LT, which has been building solar plants in Europe for more than 11 years. We bring proven solutions to Ukraine and adapt them to our grid, our outages and our prices.
Trust, quality and transparency come first: you know what you get, what it costs and when it pays for itself.
SOLET LT
Parent company: in solar since 2011, official partner of the Energy Community
Solet Ukraine
Local team, projects across Ukraine, service close to you
A home solar plant is an investment that pays back through your electricity bills. But the payback period is different for everyone. Here is what it depends on.
How much energy a plant produces
In Ukraine, each kilowatt of solar panels produces roughly 1,100–1,300 kWh a year. The south and east produce more, the north and west a little less. A 10 kW plant will produce about 11,000–13,000 kWh a year.
Output also depends on roof orientation (south is best), tilt and shade from trees or neighbouring buildings. Even partial shade on a few panels noticeably lowers the result, so we always assess the roof before designing.
What determines payback
Your consumption. The more of the plant's energy you use yourself, the faster it pays back.
The tariff. The more expensive grid power is, the more you save on every kilowatt-hour.
Configuration. A grid-tied plant without a battery pays back fastest. Storage lengthens payback but gives you what a grid-tied plant cannot: power during outages.
Equipment quality. Grade A panels lose little capacity over the years, so the plant keeps working at full strength longer.
How to estimate it yourself
Take your electricity bills for the past year and see how many kilowatt-hours you use. Then, roughly: the plant's annual output multiplied by your tariff is your annual saving. Divide the cost of the plant by that figure to get an approximate payback in years.
An exact calculation depends on the roof, your usage profile and the chosen equipment. We do it free of charge at the consultation stage.
The bottom line
A plant lasts 25 years or more and pays back much sooner. Every year after payback, the energy for your home is effectively free, and a house with a plant is worth more on the market.
The inverter is the heart of a solar plant. It converts the panels' direct current into the alternating current your home runs on. The type of inverter decides whether you have power when the grid goes down.
Grid-tied inverter
Works only together with the grid: the panels power the house and the surplus goes to the grid. It is the cheapest option with the fastest payback.
The catch: when the grid switches off, a grid-tied inverter switches off too. This is a safety requirement so the plant does not feed voltage into a line where electricians may be working. During a blackout such a plant will not help, even in bright sunshine.
Off-grid inverter
Works with batteries and no grid connection. It suits cottages, remote sites and places with no grid at all. For a city house it is usually not the most convenient choice.
Hybrid inverter
Combines both worlds. It works with the grid, the panels and a battery at the same time. When the grid is on, the plant saves you money. When the grid drops, the inverter switches to the battery and panels in a fraction of a second, and the house keeps running.
What we recommend in Ukraine
For most private homes and small businesses we recommend a hybrid system. It costs more than a grid-tied one but solves two problems at once: lower bills and protection from outages. You can add a battery later if you install a hybrid inverter from the start.
For a business, an outage is more than an inconvenience. It means a stopped line, spoiled goods and missed deadlines. An energy storage system lets you keep working while the grid is down.
Start with critical loads
Not all equipment needs to run on batteries. First identify what stops the business: cold rooms, servers, tills, lighting, pumps, specific machines. These loads go on a separate backup line, which makes the system much cheaper.
Power and capacity are different things
Power (kW) shows how much equipment the system can run at once. Capacity (kWh) shows for how long.
Example: if the critical load is 20 kW and you need to last 4 hours, you need about 80 kWh of usable capacity, plus a margin for losses and battery ageing.
Sun + battery + generator
The most resilient setup for a business combines three sources. Solar panels charge the batteries during the day and lower bills. The battery picks up the load instantly when the grid drops. The generator starts only during long blackouts, so it burns far less fuel.
Savings even without outages
Storage is not only a backup. It can shave peak loads and store energy when it is cheaper, releasing it when it is more expensive. That way the system pays back in calm months too.
Where to start
We audit the loads on your site, calculate the power and capacity you need and offer several options for different budgets. Our partner banks' programmes can help with financing.
Short days and snow make many people think a solar plant sits idle in winter. In fact it works, just less. Here is what to know.
Cold does not hurt panels
Solar modules work more efficiently at low temperatures than in the heat, so a clear frosty day can be quite productive. Winter output is lower because of short days and a low sun, not because of the cold.
What to do about snow
On tilted panels snow usually slides off on its own once the sun warms them a little. If you want to clean them, use a soft brush on a long handle.
Do not scrape ice with metal tools: you can scratch the glass.
Do not pour hot water on panels: a sudden temperature change can damage the glass.
Do not climb onto the roof in frost or ice. Safety matters more than a few kilowatt-hours.
Batteries like warmth
The lithium iron phosphate batteries we install should not be charged below zero. That is why they go in a warm room: a boiler room, garage or utility room. Modern management systems protect the battery from charging in the cold automatically.
Check the plant before winter
In autumn it is worth inspecting mounts, cables and connections and reviewing monitoring data. Our clients get this check as part of their service plan.
Since 2022, Ukraine's power system has been living in a mode no other European country has known. Strikes on power plants and substations changed the very idea of where electricity should come from.
A big system is a big target
Soviet-era energy was built around large facilities: huge thermal, hydro and nuclear plants, with power spreading across the country through transmission lines. In peacetime this is efficient. In war, every such plant and every key substation becomes a target, and damage to one site can switch off whole regions.
Ukrainians learned to live by outage schedules, work by candlelight and charge phones at resilience points. But the real answer to this threat is not to endure it but to change the architecture of the energy system itself.
Thousands of small plants instead of a few big ones
Distributed generation means energy is produced where it is used: on the roofs of homes, hospitals, schools and businesses. Destroying thousands of small solar plants spread across the country is practically impossible. Even when the grid fails, a house with its own plant and storage keeps its lights on.
That is why community energy independence today is not a trend or green fashion. It decides whether a hospital operating theatre keeps working, whether there is water in the taps and whether a school can continue its lessons.
What has already changed
In recent years, thousands of Ukrainian families and companies have installed their own solar plants and storage. International partners fund plants for hospitals and critical infrastructure. Our group works in this direction too: under the Ray of Hope initiative, hospitals in Odesa, Khmelnytskyi, Bila Tserkva and Slavutych received power.
What each of us can do
Every rooftop plant means a little less load on the grid at peak hours and a little more resilience for the whole system. When your home runs on the sun, grid power goes to those who need it more. A country's energy independence is made of the energy independence of each of us.
"Energy independence" sounds like something distant and governmental. For most people it actually means something very simple: when the power goes out, your home still has it.
What the blackouts taught us
Every Ukrainian family remembers winters when the day was planned around the outage schedule: when to charge phones, when to cook, when to get some work done. Generators hummed in courtyards, power banks became essentials, and "do you have power?" became an everyday greeting.
This experience changed how we think about energy. It no longer feels like something to take for granted. More and more people want their own source that depends neither on schedules nor on fuel.
Why sun, not a generator
A generator saves the moment, but it needs fuel, makes noise and saves no money. A solar plant with storage works quietly, charges from the sun by day and gives back energy from the battery at night. And unlike a generator, it lowers your bills every month instead of raising them.
Where to start
Decide what must run during an outage: boiler, pump, fridge, internet, lighting.
Look at your annual consumption on your electricity bills.
Assess your roof: orientation, area, shade.
Ask specialists for a calculation. We do it free of charge.
Light means peace of mind
Perhaps the most important thing your own plant gives you is a sense of control. When it is dark outside but your home has light, heat and connection, you do not depend on circumstances. These days, that is worth a lot.
Commercial offers are full of acronyms: N-type, TOPCon, half-cut, bifacial. Here is a plain explanation of which ones actually affect your plant and which just sound impressive.
N-type and P-type
This is the type of silicon the cells are made from. N-type panels lose power more slowly over the years and work better in the heat. Most quality modules on the market today are N-type, and we recommend them for any new plant.
TOPCon, HJT and PERC
PERC is a proven but older technology. Cheaper, but less efficient than newer ones.
TOPCon is today's standard: high efficiency, good behaviour in the heat, a reasonable price. The best choice for most roofs in Ukraine.
HJT heterojunction modules have the best temperature coefficient. They cost more and make sense where every square metre of roof counts.
Half-cut and glass-glass
Half-cut means the cells are cut in two. This reduces losses and makes the panel more tolerant of partial shade. A glass-glass build protects the cells on both sides and lasts longer than a classic back sheet.
Bifacial panels
Bifacial modules also collect light on their back. Over a bright surface such as gravel, concrete or snow this adds noticeable output. On a pitched metal roof the effect is small; on ground-mounted plants and flat roofs they pay off better.
What to check on the datasheet
Module efficiency: 21–23% for modern panels.
Product warranty (12–15 years or more) and power warranty (usually 25–30 years).
Temperature coefficient: the closer to zero, the less the panel loses in the heat.
A Tier 1 manufacturer and IEC certificates.
We work with Grade A modules and explain in every offer why we chose those panels for your roof.
Storage is the most expensive part of a backup system. Here are the specs that really matter so your battery lasts for years and keeps the house running exactly as long as you need.
Why LFP
Lithium iron phosphate batteries (LiFePO4, LFP) have become the standard for homes and businesses. They are safer than other lithium chemistries, do not tend to overheat and withstand thousands of charge cycles. Lead-acid batteries are cheaper upfront but last several times less.
Capacity: how many kWh you need
Work out what must run during an outage and for how many hours. A boiler with a pump, a fridge, a router and lighting in an average house use about 0.5–1 kW. To last 8 hours you need roughly 5–10 kWh of usable capacity.
Depth of discharge and cycles
Depth of discharge (DoD) shows how much of the capacity you can use without harming the battery. For good LFP batteries it is 90–95%. Cycle count is the lifespan: 6,000 cycles means more than 15 years of daily use.
Low voltage and high voltage
Low-voltage batteries (48 V) are simpler and cheaper and suit smaller systems. High-voltage modular systems are more efficient at high power and are easy to expand block by block. The key rule: the battery must be compatible with your inverter.
Where to install it
In a dry room that stays above freezing: a boiler room, garage or utility room.
Out of the sun and away from heat sources.
With access for service and ventilation.
You can start with one or two modules and add more later: modern systems allow it.
A winter of outage schedules is easier if you prepare in advance. Here is a step-by-step plan for a private house, from the list of critical appliances to what to do when the power goes.
Step 1. List your critical loads
Walk through the house and write down what you cannot do without: boiler and circulation pump, well pump, fridge, router, lighting, phone charging. Next to each, note the power from its label.
Step 2. Put them on a separate line
Critical appliances should be wired to a separate group of breakers fed by the inverter. Then during an outage the battery is not drained by the water heater, oven or air conditioner.
Step 3. Check the boiler
Gas boilers with electronics are sensitive to voltage quality. An inverter with a pure sine wave solves this. If your boiler struggled to restart after outages, check it before the frosts.
Step 4. Keep connected
Power the router and fibre terminal from the backup line.
Keep a charged power bank for phones in case of a long blackout.
Save emergency and neighbours' numbers offline.
Step 5. Plan energy for the night
By day the plant charges the battery; at night the house runs on it. A simple plan: do laundry and cooking in sunny hours and keep only essentials on in the evening. Smartphone monitoring shows how much energy is left.
Step 6. A generator as insurance
For multi-day outages, a generator connected to the hybrid inverter helps. It starts only when the battery is low and charges it, so it uses far less fuel.
Want us to size a system for your house? We calculate power and capacity free of charge.
Ukraine's solar market is growing fast, and so is the number of casual contractors. These questions will help you decide whether a company can be trusted with your roof and your money.
1. Which projects have you delivered?
Ask to see real projects, ideally similar to yours, and client contacts. Photos from the internet are not a portfolio.
2. What equipment do you propose and why?
A good installer explains the choice of panels, inverter and battery for your task rather than selling whatever is left in the warehouse.
3. Who will do the installation?
Their own crew or subcontractors? Quality and accountability depend on it.
4. Is there an output and payback calculation?
The offer should include an output forecast for your roof, not average figures from an advert.
5. What is included in the price?
Cables, protection, mounting, delivery, commissioning, paperwork. Ask what could change the final amount.
6. What warranties are there and who honours them?
The manufacturer's warranty on equipment and the installer's warranty on workmanship are separate. Ask who to call if something breaks in three years.
7. What happens after launch?
Monitoring, service, seasonal checks. A plant works for decades, and the installer should be there all that time.
We answer all seven questions before you sign anything. Ask us too.
Many Ukrainian families already own a generator and wonder whether they still need it once they install solar. They do, but it will work very differently.
The role of each source
The sun is the main source by day and the cheapest energy.
The battery is the instant backup and the energy for evening and night.
The generator is insurance for long outages in cloudy weather.
How they work together
A hybrid inverter manages all sources on its own. When the grid is down, the house runs on sun and battery. If the battery is low and there is little sun, the inverter signals the generator to start, and it charges the battery. As soon as the battery is full, the generator stops.
Why this saves money
A generator is most efficient under a steady load. When it charges the battery at full power for an hour instead of running all night for one fridge, it burns several times less fuel, with less noise and wear.
What you need to connect it
An inverter with a generator input.
A generator with stable voltage: an inverter generator or one with a good regulator.
For automatic start, a generator with an electric starter and an auto-start module.
If you already own a generator, we will include it in the plant design.
During outages, apartment buildings lose their lifts, the pumps that push water to upper floors and the lights in stairwells. A building's own plant with storage solves exactly these problems.
What it can power
A lift, or at least one lift per entrance.
Water pressure booster pumps.
Lighting in entrances, stairs and doorways.
Intercoms, CCTV and routers in the shelter.
Where to place the plant
The flat roofs of apartment blocks suit panels well: they are large and unshaded. Batteries go in a technical room with a normal temperature.
How we size it
We survey the building, measure the real consumption of shared systems and work out what is needed to get through a typical outage. By day the plant also lowers the association's electricity bills for common areas.
Financing
Homeowners' associations can use energy-efficiency loan programmes, and some projects can get support from international partners and local authorities. We help prepare the calculations and documents for these programmes.
Where to start
The decision is made by the general meeting of co-owners. We can prepare a clear presentation for the meeting: what the building gets, what it costs and when it pays back.
The feed-in tariff used to be the main argument for solar in Ukraine. The rules for selling surplus power are changing, and today a plant's value comes first of all from your own consumption.
Why self-consumption matters more
Every kilowatt-hour you produce and use straight away is a kilowatt-hour you do not pay for. It is worth your full tariff, while surplus sold to the grid usually earns less than buying costs.
How to raise your self-consumption
Move laundry, the dishwasher and water heating to sunny hours.
Add a battery so daytime surplus works in the evening.
Consider a heat pump or a smart-controlled water heater.
Size the plant to your consumption, not "with extra to sell".
What about selling surplus?
The terms for households selling energy depend on current law and your distribution system operator's rules at the time of connection. Before every project we check the current terms and include in the calculation only what applies now.
The bottom line
A plant designed around your consumption pays back regardless of changes to selling tariffs. And during outages, its main value cannot be measured in money at all.
The SOLET group has delivered more than 95 projects with a total capacity of 6+ MW in four countries. Most of them power hospitals, schools, shelters and settlements for internally displaced people.
95+projects
6+ MWcapacity
4countries
6,123 tCO₂ per year
Photos from our sites
Ground-mounted plant for a communityTbilisi, Rugby UnionRooftop plant on a public buildingGround-mounted plant in farmlandProject launch at Spiru Haret Lyceum, MoldovaUrban rooftop plantInstalling a ground-mounted plantRooftop plant on the Dostluk buildingGround plant on concrete footingsRooftop plant in a settlementPlant among orchardsPlant opening with partnersRooftop plant on a community buildingInstallation at sunset
Ukraine
The group's key market. Even in wartime we keep building plants that keep critical infrastructure powered.
Odesa
City Clinical Infectious Diseases Hospital
324 kW
Odesa
Odesa European Lyceum
224 kW
Bila Tserkva
Bila Tserkva City Hospital
204 kW
Slavutych
Slavutych City Hospital
123 kW
Khmelnytskyi
Khmelnytskyi Regional Hospital
122.4 kW
Odesa
City Children's Hospital No. 3
92 kW
Odesa
Inclusive Resource Centre No. 1
39 kW
Odesa region
Five hospitals, installation in progress
—
Ray of Hope
A social initiative under which hospitals, schools and centres for displaced people gained energy independence. At Khmelnytskyi Regional Hospital, which suffered outages from attacks on the power system, a solar plant with storage now guarantees power to critical departments and avoids more than 62 tonnes of CO₂ a year.
SolaX LFP batteries, 5.1 kWh each (30.6 kWh total)
6 pcs
Battery management system, IP66
1 pc
Solet#Smart energy management and off-peak charging
1 pc
DTSU666 three-phase meter for in-app monitoring
1 pc
CE-certified mounting system for metal roofing
47 sets
Cables, connectors, protection, delivery
set
Manufacturer warranties: 15 years on modules, 10 years on the inverter, batteries and mounting. Battery life: up to 6,000 cycles.
How much energy the plant produces
In Ukrainian and Lithuanian conditions a 10 kW plant produces 9,000 to 13,000 kWh a year. We give an exact forecast for your roof at the design stage.
How the purchase works
You receive an offer and discuss the solution with a manager.
We sign a contract and fix the price and timeline.
Designers visit the site and we reserve the equipment.
Within 1–2 days we install the plant, show you how to use it and complete the paperwork.
Can the price go up?
No, unless you ask for extra work or a different capacity. The contract price is fixed, with no hidden fees. The offer is valid for 14 days.
What is not included
Grid reconstruction on the distribution system operator's side is agreed separately.
A solar plant with storage for a private house. It lowers your bills on sunny days and keeps the house powered during outages.
What the system includes
Grade A solar modules with high efficiency and slow degradation.
A hybrid inverter that works with the grid, panels and battery at the same time.
A lithium iron phosphate battery with long life and high safety.
Smartphone monitoring: output, battery charge and home consumption in real time.
Who it is for
Homeowners who want to pay less for electricity and stop depending on outage schedules. Especially relevant if you run a pump, boiler, fridge or router, or someone works from home.
How we size the system
We look at your annual consumption, the roof area and orientation, and what must run during a blackout. That decides the number of panels, inverter power and battery capacity. You can start with a smaller battery and add modules later.
Financing
You can finance the plant through our partner banks' loan programmes so you do not pay the full amount at once.
Solar plants and energy storage for factories, warehouses, shops and agribusiness. Lower electricity bills and no downtime during outages.
What we do for business
Load audit: we identify which equipment is critical and how much energy it needs.
Rooftop and ground-mounted plants of tens and hundreds of kilowatts.
Industrial storage for backup, peak shaving and off-peak operation.
Generator integration, so it only starts during long outages.
How we calculate the benefit
We show not just the equipment cost but also bill savings, the cost of downtime you avoid and the payback period. You make the investment decision on numbers.
Investment and loans
Partner banks offer special loan programmes for business. For large sites we help attract investment and prepare the project's financial model.
Energy storage and solar plants for hospitals, schools, water utilities, shelters and municipal buildings.
Why a community needs its own power
During outages, critical infrastructure cannot stop. A hospital must operate, a water utility must supply water, a shelter must have light and connection. A plant with storage provides this without depending on fuel.
What we offer
Site survey and calculation of critical loads.
Design of the plant and storage for the specific building.
Installation and commissioning to European standards.
Service and monitoring, so the system is ready at any moment.
SOLET's experience in Europe
Our parent company SOLET LT has delivered green energy projects for more than 11 years. We bring this experience to Ukrainian communities and are ready to support projects funded by international programmes and donors.