10 MPPTs, 50kW — the workhorse of large Irish commercial solar
The Sungrow SG50CX is the standard choice for large Irish commercial solar installations above 30kWp. With 10 independent MPPTs, it can manage complex multi-section commercial rooftops, warehouse flat roofs, and ground-mount systems with multiple string orientations — all from a single inverter. IP66 rated for exposed agricultural and coastal sites. At 98.7% efficiency it is the highest-efficiency inverter in this directory overall. The iSolarCloud commercial platform provides complete generation analytics, export monitoring, and performance ratio reporting.
50kW98.7% efficiency10-yr warrantyIP663-PhaseGrid-tie onlySEAI grant
⚙️ Technical Specifications
Inverter type
3-Phase Commercial String
Rated output
50 kW
Power range
25–110 kWp
Efficiency
98.7%
MPPT inputs
10
Phase
3-Phase
Battery compatible
No — grid-tie only
Backup power
✗ No
Monitoring app
iSolarCloud
WiFi included
✓ Yes
Warranty
10 years
IP rating
IP66
Suitable for
Commercial / 3-Phase
💰 Pricing & grants
⚡ This inverter — Step 2 of system
~€4,500 supply price
You still need: panels · mounting · installation labour
💰 Irish solar grants for commercial installations
SEAI Non-Domestic Microgen grant · SEAI TAMS III for agri buildings (up to 60%) · Accelerated Capital Allowance (full year-1 write-off). Always verify eligibility at seai.ie before contracting.
Ten separate maximum power point trackers allow 10 different roof sections, orientations or tilt angles to operate independently — maximising yield on complex commercial rooftops and ground-mount configurations
📈
98.7% efficiency — highest in directory
The highest conversion efficiency of any inverter in this directory. On a 100kWp system generating 90,000 kWh/year, moving from 97.5% to 98.7% efficiency saves approximately 1,080 kWh/year — roughly €300 additional income annually
🌾
IP66 for agricultural and coastal Ireland
Fully sealed against dust and high-pressure water jets — built for Irish farm environments, coastal industrial sites, and any installation where weather exposure and hosing down are routine considerations
☀️ Installing solar? Pair it with an EV charger and list it on De Energy Hub.
Turn your EV charger into a bookable Charging Hub. Set energy mode to Pure Solar — EV drivers can choose to charge on your renewable energy. Live in under an hour.
No battery storage capability — grid-tie only, no self-consumption optimisation
No backup power
Large commercial installation — requires specialist commissioning by certified installer
Not suitable for small commercial systems (overkill below 30kWp)
📐 System sizes — indicative cost & payback
Estimated generation at 900 kWh/kWp/yr. Commercial system costs include panels, this inverter (~€4,500), mounting and installation. Payback based on a mid-range commercial electricity rate of €0.28/kWh.
System
Panels
Est. generation
Solar only (after grant)
Est. installed
Est. payback
30 kWp
52 panels
~27,000 kWh/yr
~€27,000
~3.6 yrs
50 kWp
87 panels
~45,000 kWh/yr
~€42,000
~3.3 yrs
100 kWp
173 panels
~90,000 kWh/yr
~€69,500
~2.8 yrs
200 kWp
345 panels
~180,000 kWh/yr
~€134,500
~2.7 yrs
Indicative payback by sector
🏢 Retail & Office
Rate ~€0.22–0.26/kWh. High daytime usage aligns well with solar generation.
Payback: 3–5 years
🏭 Warehouse & Manufacturing
Rate ~€0.26–0.32/kWh. Large roof + high daytime load = strongest commercial ROI.
Payback: 2.5–4 years
🌾 Agriculture (TAMS III)
Rate ~€0.18–0.24/kWh. TAMS III grant up to 60% transforms payback. Apply via Teagasc.
Payback: 1.5–3 years(with TAMS)
Estimates are indicative. Actual payback depends on your electricity tariff, usage profile, system size, roof orientation and applicable grants. Always obtain a site survey and financial model from a qualified commercial solar installer.
🔧 Complete your solar system
The SG50CX 50kW Commercial String is Step 2 — you need panels before it and most Irish homeowners now add battery storage after. Here are the most popular pairings in 2026:
💡 Commercial tip: Most Irish commercial solar installations use LONGi Hi-MO 7 (580W) or JinkoSolar Tiger Neo (580W) panels with this inverter. Fewer panels per kWp means lower mounting and labour costs at scale.
The SG50CX 50kW Commercial String is compatible with all major solar panel brands available in Ireland. See the Solar Panel Directory to compare specifications, pricing and SEAI eligibility for all 13 panels.
This is a grid-tie only string inverter — it cannot be retrofitted with battery storage. If battery storage is in your future plans, consider the hybrid inverters in the directory instead.
❓ Questions about the SG50CX 50kW Commercial String
Yes — the SEAI Solar PV Home Grant of up to €1,800 applies to the total installed system cost, which includes the Sungrow SG50CX 50kW Commercial String, panels, mounting hardware, cabling and labour. The grant is not awarded per component. Apply at seai.ie before installation begins and receive a Letter of Offer before work starts. A SEAI-registered contractor is required.
The Sungrow SG50CX 50kW Commercial String carries a 10-year product warranty from Sungrow. In practice, quality inverters from Sungrow frequently operate for 15–20 years before requiring replacement. The key factors for longevity are: installation in a cool, shaded, well-ventilated location (not in direct sunlight); proper cable termination torque during installation; and regular firmware updates through iSolarCloud.
Sungrow's iSolarCloud has improved significantly since 2023 — real-time generation, battery state of charge, consumption analytics and export tracking are all available. The mobile app is well-regarded and improving with each update. It does not yet match FusionSolar in polish, but it covers all the data most Irish homeowners need.
No — the Sungrow SG50CX 50kW Commercial String is a grid-tie only string inverter with no battery port. To add battery storage later, you would need to replace the inverter with a hybrid model (approx. €1,000–1,500 extra). An AC-coupled battery (a separate battery inverter installed in parallel) can be retrofitted without replacing the main inverter, but this is less efficient and more costly than a native DC-coupled hybrid solution. If battery storage is a possibility within the next 5–10 years, choosing a hybrid inverter from the outset is strongly recommended.
Check your electricity meter and the main circuit breaker in your distribution board. A single-phase supply has one live wire (brown), one neutral (blue) and one earth (green-yellow). A 3-phase supply has three live wires (brown, black, grey), one neutral and one earth — and your main breaker will be a 3-pole or 4-pole type. Most Irish commercial properties, farms, industrial units and larger homes above ~200m² are 3-phase. Your ESB Networks connection agreement will also confirm this. If uncertain, ask a RECI-registered electrician to check before ordering your inverter.
Multiple schemes may apply: the SEAI Non-Domestic Microgen grant for smaller commercial systems; TAMS III providing up to 60% grant aid for qualifying agricultural buildings; and Accelerated Capital Allowance (ACA) through Revenue allowing the full capital cost (including the Sungrow SG50CX 50kW Commercial String) to be written off against corporation tax in year one. The SEAI Better Energy Communities scheme may also apply for community projects. Verify current eligibility at seai.ie before contracting — grant values and thresholds are updated annually.
A string inverter converts DC solar energy to AC for immediate use or grid export — but cannot charge a battery. A hybrid inverter does the same, and also includes an integrated battery management system (BMS) that can charge and discharge a connected battery storage unit. The Sungrow SG50CX 50kW Commercial String is a grid-tie string inverter — no battery storage is included or retrofittable. If battery storage is in your plans, start with a hybrid inverter. The cost gap between hybrid and string inverters has narrowed significantly — most Irish installers now default to hybrid for all new residential installations.
Two SG50CX inverters (2 × 50kW = 100kW capacity) for a 100kWp DC solar array. Each inverter connects to approximately 50kWp of panels. With 580W commercial panels (LONGi Hi-MO 7 or JinkoSolar Tiger Neo), 100kWp requires 173 panels — approximately 87 per inverter. Each inverter's 10 MPPTs allow the 87 panels to be divided into 10 strings of 8–9 panels each, optimising layout flexibility on a large commercial roof or ground-mount system.
Not directly — the SG50CX is a DC-coupled string inverter with no battery port. However, AC-coupled battery storage can be added alongside an existing string inverter system using a separate battery inverter (such as a Victron Quattro or Sungrow hybrid inverter installed in parallel). This is less efficient than a native DC-coupled hybrid but allows retrofitting without replacing the main inverter. For new commercial installations where battery storage is planned, specifying a compatible commercial hybrid inverter from the outset is strongly recommended.
Get it installed
Find SEAI-registered installers for the Sungrow SG50CX 50kW Commercial String
Tell us your requirements and we'll connect you with experienced commercial solar installers for a full site survey, system design and financial model.
🏭 Request a commercial site survey
A qualified commercial solar installer will contact you to arrange a site survey and provide a full system design and financial model.
💶 Get quotes
3 local installers · 1 business day
💬 Get advice first
Free assessment · no obligation
Your details are only shared with SEAI-registered Irish solar installers. No spam — ever.
✅
Request sent!
A commercial solar installer will be in touch to arrange your site survey.
De Energy Hub
More power to youTM.
🚗 Built for EV fleet operators & leasing companies
Manage your entire charging fleet — across sites, with energy rate control
Fleet operators can manage charging across multiple sites through a single app. Assign Pure Energy chargers for green-fleet reporting, Smart Energy for cost efficiency, or Boost Energy for fast overnight turnaround.
☀️ Pure Energy🔄 Smart Energy🚀 Boost Energy
🚐
Vehicle category routing
Car, Minibus, Van, Truck — drivers filtered to chargers rated for their vehicle class
⚡
Energy rate per charger
Assign Pure, Smart or Boost Energy per charger — green fleet compliance tracking built in
🔑
Self & guest bookings
Fleet managers book for drivers who don't have the app — drivers notified and guided through check-in
