Onduleur DEYE Triphasé 3x230V Sans Neutre : Guide Configuration

🔌 DEYE Three-Phase 3x230V Inverter Without Neutral: The Complete ConfigurationThree-phase 3x230V electrical networks without neutral (also known as phase-to-phase IT networks) pose a major technical challenge for the integration of photovoltaic inverters. Unlike conventional 3x400V networks with distributed neutral, these older configurations — still present in 15 to 20% of Belgian installations — require a specific inverter configuration and a thorough understanding of electrical constraints.This comprehensive technical guide provides step-by-step instructions for configuring a DEYE three-phase inverter (SUN-6K to SUN-12K SG04LP3/SG05LP3 series) on a 3x230V IT network, with integration of the CHINT DTSU666 smart meter in Aron mode for optimal management of self-consumption and Zero Export."With the right configuration, a DEYE three-phase inverter on a 3x230V network can achieve up to 90% self-consumption and reduce your energy bill by 60 to 75%." — Wattuneed Technical Team⚡ Understanding the 3x230V network without neutral (Phase-Phase IT network)🔍 What is a 3x230V IT network?A 3x230V IT (Isolation Earth) network without neutral is characterised by:3 phases L1, L2, L3: phase-to-phase (line-to-line) voltages of 220 to 230 V between each pair of phases (L1-L2, L2-L3, L3-L1)No distributed neutral conductor: the neutral point is isolated or connected to earth via high impedancePhase-to-phase voltage ≈ 220–230 V (LL – Line to Line configuration)Theoretical phase-neutral voltage ≈ 127–133 V (√3 times less than the phase-phase voltage), but the neutral is not accessibleHistorical configuration: old Belgian and European networks, buildings constructed before 1980, rural areas⚠️ WARNING: NEVER connect a conventional single-phase inverter (configured for 230V phase-neutral) to this type of network without the appropriate configuration. Risk of destructive overvoltage (up to 380–400 V between certain phases)!📊 Difference with a 3x400V + neutral networkCritèreRéseau IT 3x230V(Sans Neutre)Réseau TN/TT 3x400V(Avec Neutre)Tension phase-phase220–230 V (L1-L2, L2-L3, L3-L1)400 V (L1-L2-L3)Tension phase-neutreNon disponible (neutre isolé)230 V (L1/L2/L3 vers N)Conducteur neutre (N)❌ Absent ou isolé✅ Distribué (4 fils + PE)Configuration onduleurMode IT / LL 230 VAC activéMode standard (défaut usine)Puissance disponible onduleur triphaséRéduite (÷√3)Ex : 10 kVA → 5,8 kWNominaleEx : 10 kVA = 10 kWPrévalence15–20 % installations BE (anciennes)80–85 % installations modernesDiagram 1: DEYE Single-phase on 3x220V Network Without Neutral – Connection L → L1 (Brown), N → L2 (Black), PE → Earth ⏚🆚 Single-phase vs Three-phase: Which DEYE Inverter to Choose?💡 Solution 1: DEYE Single-phase Inverter (SUN-3K/5K/6K/8K SG01LP1)Principle: Use 2 out of 3 phases (e.g. L1 + L2) with a phase-to-phase voltage of 220–230 V.Advantages:Lower cost (€800 to €1,200 including VAT, depending on power)Simplified installation (2 live wires + PE)Quick configuration (IT mode can be activated via HMI)Suitable for small installations (3 to 6 kWp)Disadvantages:Phase imbalance: injection on only 2 phases → risk of asymmetrical voltageLimited power (max. 5 kVA single-phase on the ORES grid)No automatic load balancingMore complex RGIE compliance (validation by an approved body is mandatory)💡 Recommended product: DEYE SUN-6K-SG04LP3-EU Three-phase inverter 6 kVA three-phase solution with automatic balancing and CHINT meter included⚡ Solution 2: DEYE three-phase inverter (SUN-6K to 12K SG04LP3/SG05LP3)Principle: Use the three phases L1, L2, L3 with balanced injection into the phase-phase grid.Advantages:Automatic balancing of the 3 phases → symmetrical injection, easier compliance with electrical regulationsHigh inverter power available: 6 to 12 kVA nominalHigher connection power permitted by the DSO: minimum 10 kVA without requestScalability: stackable battery support: Pylontech or DELONGAdvanced EMS: Time-of-Use (TOU), Smart Load, DEYE Copilot (AI)Balanced grid injection → no disturbance to neighboursCompliance with EN 50549-1, EN 50438, C10/11 (Belgian standards)Disadvantages:Higher cost (€2,450 to €2,810 including VAT depending on model)Reduced available power (÷√3) in 3x230V mode: see table belowMore complex HMI configuration (6 detailed steps)📉 Calculation of available power (division by √3)In 3x230V phase-to-phase mode, the available AC power is reduced by a factor of √3 ≈ 1.732 compared to the nominal power of the inverter:Formula: Available power (W) = Nominal power (VA) ÷ √3 Example: DEYE SUN-10K (10,000 VA) → 10,000 ÷ 1.732 ≈ 5,774 W availableModèle DEYEPuissance NominalePuissance Disponible 3x230VPrix TTC 2026SUN-6K-SG04LP3-EU6 000 W (6 kVA)≈ 3 464 W2 450 €SUN-8K-SG04LP3-EU8 000 W (8 kVA)≈ 4 619 W2 662 €SUN-10K-SG04LP3-EU10 000 W (10 kVA)≈ 5 774 W2 810 €SUN-12K-SG04LP3-EU12 000 W (12 kVA)≈ 6 928 WSur demande💡 Wattuneed tip: For a 6 kWp installation, choose a DEYE SUN-10K (5.8 kW available) rather than a SUN-8K (4.6 kW) to avoid clipping during solar production peaks.Synergrid expressly lists DEYE inverters as 3x230. This means that installing a 15 KVA DEYE inverter on a 3x230V network is possible without prior approval from the DSO. The inverter is listed for an injection power of 8.6 kVA.Diagram 2: DEYE Three-phase SUN-10K – Complete Wiring with Batteries and CHINT DTSU666 MeterDiagram 3: Energy Flow of a DEYE Installation with Self-Consumption and Intelligent EMSDiagram 4: Single-phase vs. three-phase comparison – advantages and disadvantages⚙️ DEYE 3x230V Configuration Procedure (6 Steps)Configuring a DEYE three-phase inverter on a 3x230V IT network requires special attention to the HMI (Human Machine Interface) settings. Here is the complete procedure validated by Wattuneed experts.📋 Mandatory PrerequisitesRequired equipment:DEYE three-phase inverter series SG04LP3 or SG05LP3 (SUN-6K to SUN-12K)CHINT DTSU666 three-phase smart meter with 2 CT clamps (Aron mode)Cables of appropriate cross-sectionDifferential protection: three-phase circuit breakerMinimum HMI version required: 1001-C024 or higherVerification: Advanced Settings menu → Device Info → HMI VersionIf version is obsolete: contact Wattuneed support for firmware updateStable mains voltage: L1-L2, L2-L3, L3-L1 between 200 and 253 V (tolerance ±10%)⚠️ SAFETY WARNING: The following operations involve dangerous voltages (220–380 V). Only qualified electricians with BR/B2V certification should perform these operations. Switch off the main power supply before performing any operations.🔧 Detailed 6-step procedure1 Check the HMI versionHMI navigation:Advanced Settings → Device Info → HMI VersionMandatory check:HMI version displayed: 1001-C024 or higher ✅If lower version (e.g. 1001-C018): firmware update required ❌⚠️ Action if obsolete: Contact support.wattuneed.com or call +32 87 45 00 34 for technical assistance and update.2 Activate IT Mode (Neutral-free network)HMI navigation:Grid Setting → Grid Selection → Grid TypeParameters to configure:Grid Frequency50 Hz (Europe/Belgique)Grid LevelLL: 230 VAC (mesure Line-to-Line phase-phase)IT SystemEnabled (activer impérativement)💡 Technical tip: The LL 230 VAC parameter indicates that the inverter measures the voltage between phases (L1-L2, L2-L3, L3-L1), and not phase-neutral (LN). This is key to the IT configuration.3 Configure Voltage/Frequency Ranges (Initial Connection)HMI navigation:Grid Setting → Grid Protection → Voltage & Frequency LimitsParameters (Phase 1 – Initial Connection):LL Voltage Min180 V (plage élargie pour 1ère connexion)LL Voltage Max280 V (plage élargie pour 1ère connexion)Frequency Min45 Hz (tolérance élargie temporaire)Frequency Max65 Hz (tolérance élargie temporaire)⚠️ Important: These extended ranges allow the inverter to connect to the grid even if the settings are not yet optimal. They will be tightened in step 4 for RGIE compliance.4 Tighten Ranges (Reconnection After Fault)HMI navigation:Grid Setting → Grid Protection → Reconnect LimitsSettings (Phase 2 – Normal Operation):LL Voltage Min200 V (conforme EN 50549-1)LL Voltage Max253 V (conforme EN 50549-1)Frequency Min47 Hz (norme européenne)Frequency Max52 Hz (norme européenne)Reconnect Delay60 s (temporisation sécurité)💡 RGIE compliance: These ranges comply with Belgian standard C10/11 and European standard EN 50549-1 for low-voltage connected micro-generators.5 Configure Island ProtectionHMI navigation:Grid Setting → Protection → Anti-IslandingPrinciple: Automatic disconnection in 2 stages (fast + slow) in the event of a grid fault.🔴 Stage 1 – Fast Disconnection (0.2 s)U Max Stage 1265 V / 0,2 sU Min Stage 1100 V / 0,2 sF Max Stage 152 Hz / 0,2 sF Min Stage 147 Hz / 0,2 s🟠 Stage 2 – Slow Disconnection (1.5 s)U Max Stage 2253 V / 1,5 sU Min Stage 2184 V / 1,5 sF Max Stage 251 Hz / 1,5 sF Min Stage 2Non applicable (déjà couvert par Stage 1)📊 Additional protectionsPn ramp (progressive power reduction): ≤ 20% Pn per minute if voltage > 253 V10-minute average: U(L-L) must remain ≤ 253 V over a 10-minute sliding window⚠️ Mandatory compliance: These parameters comply with EN 50549-1 (anti-islanding protection) and Belgian C10/11 standards. Do NOT modify without validation by an approved body (VINCOTTE, AIB-Vinçotte, RESA).6 Final Approval and VerificationActions to be taken:Save the configuration: Save or Apply menu, then confirmRestart the inverter: Cut off AC + DC for 30 seconds, then turn the power back onWait for stabilisation: 2 to 3 minutes for network connection and handshake✅ Checks on LCD screen:Tension L1-L2220 ± 10 % (198–242 V) ✅Tension L2-L3220 ± 10 % (198–242 V) ✅Tension L3-L1220 ± 10 % (198–242 V) ✅Fréquence Réseau50,00 Hz ± 0,5 Hz ✅Statut OnduleurGrid Connected ou Normal ✅📋 Check Event Log:Event Log or Alarm History menu → No errors of type:❌ Grid Fault ❌ Grid OV (network overvoltage)❌ Grid UV (network undervoltage)❌ Grid Freq High/Low (frequency out of range)✅ Configuration successfully completed! Your DEYE inverter is now operational on a 3x230V IT network. Proceed to the next step: integrating the CHINT DTSU666 meter."Configuring IT mode on DEYE inverters requires precision and rigour. An error in the settings can lead to unexpected disconnections or, worse, damage to the equipment. Seek assistance from a Wattuneed professional." — Wattuneed Technical Service📊 Integration of CHINT DTSU666 meter in Aron mode🔌 What is Aron Mode (2 Clamps)?The CHINT DTSU666 meter operates in Aron Mode (also known as the 2-wattmeter method) to measure three-phase power with only 2 CT (Current Transformers) clamps instead of 3.Principle: Measurement of currents on L1 and L3, with L2 as a common referenceFormula: Total power = P(L1) + P(L3), calculated by the meterAdvantage: Reduction in the number of sensors (cost, complexity)Limit: Maximum measurable power ≈ 3.68 kVA in Aron mode (sufficient for Zero Export on domestic installations)🔧 Physical installation of the CHINT DTSU666DIN rail mounting: near the three-phase main circuit breakerCT connections (clamps):CT1 (clamp 1) → Phase L1 (BROWN wire)CT3 (clamp 3) → Phase L3 (GREY wire)L2 (BLACK wire) → Not clamped, used as electrical referenceRS485 wiring: serial connection to the DEYE inverterTerminal A+ DTSU666 → Terminal A+ inverterTerminal B- DTSU666 → Terminal B- inverterMaximum length: 15 m (shielded cable recommended)Net ID address: set to 33 (DEYE default value)💡 Recommended product: CHINT DTSU666 Three-phase meter RS485 smart meter with 3 CT clamps (Aron mode), compatible with DEYE/Sofar/SAJ⚙️ Software configuration (DEYE HMI)HMI navigation:Grid Setting → Grid Parameter → CT Meter SetupParamètre HMIValeur à ConfigurerDescriptionZero ExportEnabledActive la limitation d'injection réseauExport Limit0 W (ou valeur souhaitée)Puissance max autorisée vers le réseau(0 W = aucune injection)CT TypeExternalIndique l'utilisation d'un compteur externe (CHINT DTSU666)CT Net ID33 (défaut)Adresse RS485 du compteur CHINTCT DirectionForward ou ReverseÀ ajuster selon sens de montage des clamps(test en injection PV : valeur doit être positive)✅ Functional ValidationOnce configured, check the inverter's LCD screen or the DEYE Cloud application:CT measurement active: Grid power displayed (positive = consumption, negative = injection)Active zero export: If there is a PV surplus, the inverter reduces feed-in to maintain ≤ 0 W to the gridResponsiveness: Response time ≈ 2–5 seconds (technological limitation of Aron mode)💡 Wattuneed tip: In Aron mode, Zero Export is limited to approximately 3.68 kVA. For installations > 6 kWp with significant feed-in, consider a 3-clamp meter (e.g. SDM630 Modbus) for complete measurement.Diagram 6: DEYE Terminal Connection Guide – L/N/PE Correspondence and IEC 60446 Colours🧠 EMS Optimisation: TOU, Smart Load and DEYE CopilotDEYE three-phase inverters incorporate advanced energy management systems (EMS) to maximise self-consumption, reduce costs and extend battery life.⏰ Time-of-Use (TOU) – Tariff ArbitrageTOU mode allows you to programme time slots to optimise battery use according to your energy supplier's off-peak (OP) / peak (P) rates.Off-peak hours (HC): 10 p.m.–7 a.m. → Charge battery from the grid (if tariff is advantageous)Peak hours (PH): 7 a.m.–10 p.m. → Battery discharge to power the home (avoids costly grid consumption)HMI configuration: EMS menu → Time-of-Use → Add Time SlotsEstimated savings: £200 to £300 per year with dual hourly rates in the UK🔌 Smart Load – Intelligent Load ManagementThe Smart Load function allows you to control non-critical equipment (water heater, swimming pool, EV charging station) based on available PV surplus.Principle: Programmable relays (or via external contactors) activated when PV production > instantaneous consumptionCompatible equipment:Electric water heater (2–3 kW): heating during solar peaksSwimming pool pump (0.5–1.5 kW): filtration during the day onlyEV charging station (3.7–11 kW): vehicle charging with surplus PVSelf-consumption gain: +15 to 25% depending on consumption profile🤖 DEYE Copilot – Predictive AI (New for 2025)The DEYE Copilot system (available via HMI 1001-C030+ firmware update) uses artificial intelligence to optimise energy management in real time.AI functions:Solar weather forecast (48-hour PV production forecast)Automatic learning of household consumption profileDynamic optimisation of battery charge/discharge cyclesTariff recommendations (best time to charge from the grid)Measured gains (Wattuneed tests):Self-consumption: +12% on average over 6 monthsOptimised battery cycles: +8% estimated lifespanOverall profitability: +8 to 10% over 20 years🔧 RECOMMENDED SOLUTIONDEYE SUN-10K inverter with complete EMS (TOU, Smart Load, Copilot) ⚡ DISCOVER THE DEYE SUN-10K 💰 Case study: 6 kWp + 9.6 kWh installation (Belgium)📐 Technical configurationComposantModèle/CaractéristiquesQuantitéPrix TTC (2026)Panneaux PV335 Wc monocristallin (ex : Longi Hi-MO 5)18≈ 4 200 €OnduleurDEYE SUN-10K-SG04LP3-EU12 810 €BatteriesPylontech US5000 (4,8 kWh chacune)21 999,98 €(999,99 € × 2)CompteurCHINT DTSU666 Triphasé1≈ 150 €AccessoiresStructure fixation, câbles, protections, connecteurs—≈ 450 €TOTAL MATÉRIEL (hors installation)≈ 9 610 € TTCInstallation clé en main Wattuneed≈ 2 000 € TTCINVESTISSEMENT TOTAL≈ 11 610 € TTC📊 Performance and profitabilityAnnual PV production: ≈ 5,400 kWh (south-facing, 35° tilt, central Belgium)Typical household consumption: 4,500 kWh/yearSelf-consumption rate:Without batteries: 40 to 50%With batteries (2× US5000 = 9.6 kWh): 85 to 90%Residual grid injection: ≈ 540 kWh/year (10% of production)Residual grid consumption: ≈ 450 kWh/year (10% of requirements)💶 Profitability calculationÉconomies électricité (autoconsommation)≈ 1 458 € / an(4 050 kWh × 0,36 €/kWh)Gains arbitrage TOU (HC/HP)≈ 250 € / an(charge batteries en HC, décharge en HP)Économies TOTALES annuelles≈ 1 708 € / anROI sans primes ni aides6,8 ans (11 610 € ÷ 1 708 €)ROI avec primes Belgique (Wallonie, Bruxelles)4,5 à 5,5 ans(selon région et profil)"With an optimised three-phase DEYE installation and Pylontech batteries, our Belgian customers achieve self-consumption rates of 90% and an ROI of less than 5 years. Energy independence has never been so accessible." — Wattuneed Sales Team📚 Wattuneed Resources and Support🛠️ Online ToolsAutomatic PV sizing tool: calculate the optimal power for your roof and consumption→ Wattuneed ToolboxProfitability Calculator: estimate your ROI with or without regional subsidiesSelf-consumption simulator: project your self-consumption rate with/without batteries📖 Technical DocumentationDEYE installation guides (PDF): user manuals, datasheets, certificates of conformity→ Wattuneed SupportPylontech battery technical data sheets: BMS protocols, CAN/RS485 settingsRGIE and C10/11 standards: Belgian electrical compliance summaries📞 Dedicated Customer SupportTechnical assistance: +32 87 45 00 34 (Mon-Fri 9am-6pm)Email support: info@wattuneed.comOnline after-sales service platform: support.wattuneed.com (tickets, FAQs, tutorial videos)🏗️ Turnkey installationWattuneed offers complete turnkey installations by qualified and certified electricians:Free technical visit and personalised quoteRGIE-compliant installation + approval by an accredited bodyWarranties: 10 years for inverters, 10 years for batteries, 25 years for panelsUser training: HMI familiarisation, monitoring, maintenance📞 REQUEST A FREE QUOTEOur experts will analyse your installation and offer you the best solution 📋 CONTACT US ❓ Frequently asked questions (FAQ)1️⃣ Can I use a single-phase DEYE inverter on a 3x230V network without a neutral?Answer: Yes, by connecting the L terminal to phase L1 and the N terminal to phase L2 (which serves as a reference). The PE terminal must be connected to earth only. Please note: this configuration creates a phase imbalance and requires RGIE validation by an approved body. For installations > 6 kWp, a three-phase inverter is recommended.2️⃣ What is the actual power available from a DEYE SUN-10K in 3x230V mode?Answer: The nominal power of 10 kVA must be divided by √3 (≈ 1.732) in a 3x230V phase-to-phase configuration. Result: ≈ 5,774 W available. This reduction is due to the line-to-line (LL) measurement instead of the conventional line-to-neutral (LN) measurement.3️⃣ Does the CHINT DTSU666 meter operate in Aron mode with only 2 clamps?Answer: Yes, the DTSU666 supports Aron mode (2 wattmeters) by placing the CT1 clamps on L1 and CT3 on L3, with L2 as the unclamped reference. Limitation: maximum measurable power ≈ 3.68 kVA. For installations > 10 kWp with significant injection, consider a 3-clamp meter (SDM630 Modbus).4️⃣ Can I activate Absolute Zero Export (0 W injection)?Answer: Yes, via the HMI Grid Parameter → Zero Export Enabled menu and Export Limit = 0 W. Please note: in Aron mode, responsiveness is limited (2–5 s latency). You may observe momentary injection peaks of 100–300 W during rapid changes in consumption.5️⃣ What subsidies and grants are available in Belgium for a photovoltaic installation?Answer: Aid varies depending on the region:Wallonia: Qualiwatt subsidy (formerly) replaced by advantageous prosumer tariff + 6% VAT on installations ≤ 10 kWpBrussels: Prosumer subsidy + green certificates (GC) depending on installed capacityFlanders: Net metering system (saldering) partially maintained + low-interest loansContact Wattuneed for personalised assistance with your administrative procedures.6️⃣ How long does it take to install and configure a DEYE three-phase inverter on an IT network?Answer: Allow approximately 1 to 2 days for a turnkey installation by a Wattuneed professional:Day 1: Installation of inverter, batteries, AC/DC cabling, protective devices, CHINT meterDay 2: HMI configuration (6 detailed steps), validation tests, user trainingFor an experienced DIY installer: add an extra day for configuration and troubleshooting.Wattuneed SPRLRue Henripré 12, 4821 Andrimont, BelgiumTel: +32 87 45 00 34 – info@wattuneed.comwww.wattuneed.com | Technical support