A 50kW solar system can be a practical scale for an Irish business with a large roof and regular daytime electricity use. Warehouses, factories, farms, offices, hotels, retail premises and businesses running electric vehicle fleets may all benefit from generating some of their electricity on site. The key is to size the array around the site’s demand, roof and electrical connection—not simply choose a capacity because it sounds substantial.
A 50kW system is a power rating, not a promise that the panels will produce 50kW continuously. Solar output rises and falls with daylight, weather and season. This guide covers indicative costs, grant rules, likely output and how a solar array might work alongside a 50kW EV charger. Figures are planning examples only; a site survey and current supplier quotes are needed for a decision.
What is a 50kW solar system, and which businesses can benefit?
A commercial solar PV system converts daylight into direct-current electricity. Inverters convert that electricity to AC for use in the building. A 50kWp array is rated under standard test conditions; its real-time output is usually lower and changes throughout the day. Businesses that use electricity while the sun is shining can directly consume more of the energy they generate, reducing grid imports.
The system may suit a site with a sizeable, structurally sound roof and predictable daytime load. Examples include refrigeration and processing at farms, production lines at factories, pumps and ventilation in warehouses, daytime office equipment, hotel kitchens and laundries, or daytime fleet charging. A business with low daytime consumption can still use solar, but more output may be exported, so the financial case depends on its export arrangements as well as its import tariff.
50kW solar system cost in Ireland
LVP Renewables lists a broad installed benchmark of €850–€2,000 per kWp, and its FAQ estimates that a 50kWp system may cost roughly €40,000–€55,000 before grant support. The upper end of the broad per-kWp range can apply to more complex scopes, so use the 50kWp figure as a starting point rather than a fixed quote. Equipment choice, roof condition and electrical works can move the final figure.
The total project cost may include panels, inverters, mounting hardware, cabling, protection equipment, monitoring, access equipment, electrical work, commissioning and documentation. It may also include roof repairs, structural checks, switchboard changes, export controls or network works. Ask for a written quote that separates these elements and states what is excluded.
What affects the commercial solar installation cost?
The main cost drivers include:
•Roof and mounting: Metal, membrane and other roof types need different fixing approaches. Roof age, access, height, wind loading and structural capacity can add survey or installation work.
•Electrical infrastructure: The existing distribution board, cable routes, inverter location and spare capacity affect the design. A system may require switchboard or protection upgrades.
•Grid connection and export: The connection route, permitted export and any required network work must be checked before installation. ESB Networks assesses relevant generation applications, and its mini-generation process includes a technical review and connection offer.
•Equipment and project scope: Panel and inverter specifications, monitoring, battery readiness, warranties, project access and installation complexity all affect price.
How many panels are needed for 50kW?
The calculation is system capacity divided by each panel’s rated wattage. Examples are:
•400W panels: 50,000 ÷ 400 = 125 panels
•450W panels: 50,000 ÷ 450 = about 112 panels
•500W panels: 50,000 ÷ 500 = 100 panels
These are approximate module counts; the designer will select an arrangement that fits roof dimensions, setbacks, shading and electrical design. As a space guide, SEAI gives an example of a 30kWp system with 75 panels and an array area of about 125m². A 50kWp design may therefore need roughly 200m² or more of usable roof area, depending on module dimensions and layout.
Estimated annual generation in Ireland
For an initial feasibility estimate, assume around 850–950kWh per installed kWp per year. On that basis, a 50kWp system could generate roughly 42,500–47,500kWh (42.5–47.5MWh) in a typical year. This is an illustrative planning range, not a forecast for a particular address. LVP’s published Irish PV guide gives an estimate of up to 8,500kWh per year for a 10kW system, while the European Commission’s PVGIS tool can estimate monthly and yearly production using a site’s location, solar radiation, module type, mounting angle and system losses.
Generation varies with roof orientation and tilt, shading, local weather, seasonal daylight, panel temperature, dirt and equipment performance. A south-facing, unshaded roof may produce a different annual and seasonal profile from an east-west array. Use a site-specific PVGIS assessment and installer design before basing a business case on one annual figure.
Potential business savings and return on investment
Savings depend on how much solar electricity the business uses on site, the electricity it would otherwise buy, and the value it receives for any exported surplus. A simple illustrative scenario: if a 50kWp system generates 45,000kWh and the business uses 70% on site, it avoids buying 31,500kWh from its supplier. At an assumed import value of €0.25/kWh, that portion is worth about €7,875. If the remaining 13,500kWh is exported at an assumed €0.10/kWh, the additional value would be €1,350. The illustrative gross annual energy value is therefore €9,225.
Those tariff assumptions are examples only, not current Irish tariffs or a savings guarantee. The calculation excludes fixed charges, taxes, export limits, finance, maintenance, inverter replacement and other project costs. At a €40,000–€55,000 installation price, dividing capital cost by this sample benefit gives a rough pre-grant simple-payback range of about 4.3–6 years. It is not a full investment appraisal. Recalculate with the business’s actual half-hourly demand, supplier tariff, export terms and confirmed grant amount. Daytime loads and fleet charging can increase self-consumption, but the system’s output and demand do not always coincide.
SEAI grants and support for Irish businesses
The SEAI Non-Domestic Microgen Grant (NDMG) supports eligible solar PV for businesses, farms, public bodies, schools, community centres and non-profit societies. The scheme covers systems up to 1,000kWp. As checked on 14 October 2026, SEAI says an enhanced grant schedule applies to new applications made from 6 October 2026 to 6 July 2027, with effective support of up to 45% and a maximum grant offer of €325,200. The final payment is the lower of the grant value on the application summary and 45% of the invoiced cost. The amount for a particular 50kWp project should be checked in SEAI’s current calculator and confirmed in its offer; do not treat a maximum as an entitlement.
Applicants must select a registered SEAI Non-Domestic Microgen company and agree the work before applying. SEAI says not to start works until the grant offer arrives. The installer also needs to complete the relevant ESB Networks connection steps before installation. Grant windows, rules and application documents can change, so verify current SEAI guidance before signing or scheduling work.
What is a 50kW EV charger—and how is it different?
A 50kW EV charger describes the charger’s maximum output power. It is not the same as a 50kWp solar array: one is a charging load, the other is a solar generation rating. A 50kW DC charger can deliver up to 50kW under suitable conditions, but the vehicle’s charging hardware, battery temperature and state of charge can reduce the actual rate. SEAI notes that the vehicle is limited by its own maximum charging capability, and charging can slow as the battery approaches full.
At a constant 50kW, delivering 25kWh would take at least 30 minutes. In practice, charging curves and vehicle limits mean a session may take longer. The same power rating does not mean every EV will charge at 50kW.
Can a 50kW solar system support EV charging?
Yes, it can contribute energy to EV charging at a business, particularly during bright daytime hours, but it cannot be relied on to continuously supply a 50kW charger. The solar array may be producing far less than its rated capacity at a given moment, while the charger and building loads may be drawing more. The grid supplies the shortfall unless a suitably designed battery or other power source is available. Solar output may also exceed charging demand at other times.
A 50kW charger also adds a substantial electrical load. The site’s import capacity, existing peak demand, charger operating schedule and ESB Networks connection arrangements should be reviewed as part of the design. Smart charging can schedule fleet vehicles for solar-rich hours, share available power between chargers, or reduce charging when the building is at peak demand.
Combining commercial solar panels and EV charging
Solar PV and charging can complement each other when vehicles are parked during daylight. A depot can direct solar electricity to vans between routes, while a hotel, office or retail site can offer workplace or destination charging. Charging from on-site generation can raise solar self-consumption, but the saving depends on the solar profile, vehicle dwell time and the cost of grid electricity.
A useful first step is to compare the site’s half-hourly electricity demand with expected solar generation and vehicle arrival times. If charging mostly happens after sunset, a battery or smart charging may help, but both add cost. A system should be modelled against the actual schedule rather than assuming all daytime solar will be used by vehicles.
EV charger installation cost, consumption and running costs
A 50kW DC charger is a different project from a common 7–22kW AC workplace charger. For early budgeting, a Europe-wide 2026 market guide places a 50kW DC charger at roughly €25,000–€55,000 installed, before exceptional site-specific grid upgrades. This is a broad planning allowance, not a guaranteed Irish price. Cable runs, trenching, foundations, switchgear, network capacity, software, payment equipment and the number of charging ports all affect a quote; major grid works can push the total higher.
A charger delivering 50kW for one hour supplies up to 50kWh, assuming it can run at full output throughout that hour. If a vehicle receives 30kWh in a session, the idealised energy cost at an assumed business import rate of €0.25/kWh is €7.50, before charging losses and any fixed or network charges. Allowing for conversion losses, it would be higher. Actual costs depend on how much energy is delivered, the site’s tariff, charger efficiency, solar share and any back-end or maintenance fees. Check the current business tariff with the electricity supplier.
Batteries, smart charging and grid electricity
A battery can store surplus midday solar electricity for later charging or evening building use. It does not create extra energy; the usable output is limited by battery capacity, charge/discharge power and conversion losses. Battery size should match the charging schedule and business load, and its added cost should be compared with the value of using or exporting surplus solar.
Smart chargers can respond to solar output and building demand. They can prioritise on-site renewable energy, cap the site’s total load or distribute power across multiple vehicles. Grid electricity remains important when solar production is low or vehicles need more power than the array is generating. An export limit or network condition may also affect how surplus generation is managed.
Roof suitability, installation, maintenance and warranties
A commercial assessment should check roof condition and remaining service life, structural capacity, wind loads, shading, access, fire and electrical safety, inverter location and cable routes. Planning exemptions depend on the building and location. Government guidance says non-domestic rooftop solar is generally exempt outside Solar Safeguarding Zones, while a 300m² rooftop limit applies within those zones; protected structures, Architectural Conservation Areas and other conditions can also affect the position. Confirm the rules for the specific property with the local planning authority where needed.
A typical project proceeds through energy-bill review, site and structural surveys, system design, grant application, grid connection assessment, installation, commissioning and handover. Ask the installer for monitoring access, maintenance recommendations, product and workmanship warranty terms, and a clear explanation of who handles SEAI and ESB Networks documentation. Arrange periodic visual and electrical checks and respond to monitoring alerts; soiling, damage or equipment faults can affect output.
Choosing a reliable commercial solar installer in Ireland
Request proposals from SEAI-registered NDMG companies and compare like-for-like system capacity, expected generation assumptions, equipment, mounting design, warranties, grid/export scope and exclusions. Ask how the design accounts for your half-hourly usage and whether any export or import-capacity issue needs a network application. Check that the quote identifies grant assumptions separately and does not present projected savings as guaranteed.
LVP Renewables provides commercial PV services for a range of Irish business premises. Read more about commercial solar PV and photovoltaic PV panels, or visit LVP Renewables to discuss a tailored system. Share recent electricity bills, your Eircode and details of any planned EV fleet or charger so the proposal can reflect the site’s actual needs.
Conclusion: plan a 50kW solar system around your business
A 50kW solar system may suit an Irish business with adequate roof space, a compatible electrical connection and daytime electricity demand. Its likely value depends on site-specific generation, self-consumption, grant eligibility, electricity tariffs and any additional works. Pairing solar with a 50kW EV charger can make sense where vehicles are on site during the day, but the charger’s rated power and the array’s peak capacity are not a guaranteed match at every moment.
For a tailored commercial solar installation quote, contact LVP Renewables with your recent bills and site details. A properly scoped design can show expected generation, grant assumptions, connection requirements and the options for adding EV charging.
FAQs
How much does a 50kW solar system cost in Ireland?
A 50kWp commercial system may cost approximately €40,000–€55,000 before grants, as an indicative range published by LVP Renewables. The final quote depends on the roof, equipment, electrical work, grid connection and installation complexity. Check current SEAI grant eligibility and the specific grant offer before subtracting any support from the budget.
How many solar panels are needed for a 50kW solar system?
It depends on panel wattage. A 50kWp system needs about 125 × 400W panels, 112 × 450W panels, or 100 × 500W panels. Roof layout and equipment selection can change the final count.
Can a 50kW solar system power a 50kW EV charger?
It can contribute to charging, but it will not continuously provide 50kW. Solar output varies with daylight, weather, orientation and shading, and the vehicle may not accept the charger’s full rated power. The grid or a suitably designed storage system supplies any shortfall.
How much can a business save by combining solar panels with EV charging?
There is no guaranteed figure. Savings depend on the annual solar output, the share used on site, the business import tariff and export terms. In the illustrative example above, 45,000kWh of solar generation, 70% self-consumption and assumed rates of €0.25/kWh imported and €0.10/kWh exported produce about €9,225 in gross annual energy value, before costs and subject to those assumptions.
