Sunsynk ECCO 8kW Single Phase Hybrid Inverter SYNK-8K-SG05LP1-EU Solar Battery Storage
The Sunsynk ECCO 8kW Hybrid Inverter (model SYNK-8K-SG05LP1-EU) is a single-phase all-in-one energy management system that integrates solar PV, battery, grid and generator inputs in a single wall-mounted unit. Rated at 8,000 W continuous output (8,800 W max), it accepts up to 10,400 W DC across two independent MPPT trackers (two strings each) and can simultaneously export to the grid while charging the battery. The ECCO variant uses natural convection cooling — completely silent at all loads, with no fan noise at any point in its operating range.
Compatible with 48 V lead-acid and lithium-ion batteries (BMS self-adaption via RS485 or CAN), including Pylontech US2000/US3000/US5000, Force-L2 and Sunsynk CATL. Multiple operating modes — self-consumption, time-of-use, off-grid, grid-tied and UPS/backup — are configurable from the Sunsynk App (iOS/Android, Wi-Fi/GSM). The inverter is fully scalable: start with panels only, batteries only, or a complete hybrid system and expand at any time. Certified G98 and G99 for UK DNO notification/application. 5-year manufacturer warranty.
Two independent MPPT trackers each accept two strings at up to 26 A, with a 125–500 V operating range. Panels on different roof pitches or orientations are tracked separately — no cross-string dragging. 10.4 kWp against 8 kW AC gives effective 30% oversizing for better shoulder-period yield.
The ECCO variant has no fan — it relies entirely on natural convection for thermal management. The result is completely silent operation at all load levels, making it ideal for installations close to living or sleeping spaces, or anywhere fan cycling noise would be intrusive.
The ECCO can export to the grid and charge the battery at the same time from the same PV array. Connect up to 10.4 kWp, export 8 kW continuously and direct surplus energy to the battery — all managed simultaneously by the inverter.
High 190 A maximum charge and discharge current for fast battery cycling from surplus PV and rapid response to household peak loads. BMS self-adaption via RS485 or CAN works with Pylontech, Sunsynk CATL and most 48 V LV battery brands — no manual battery type configuration required.
Configurable for self-consumption, time-of-use (ToU), grid-tied, off-grid and UPS/backup. Charge/discharge timing windows align with Octopus Agile, Flux, Economy 7 or any dynamic tariff. Zero-export mode prevents grid feed-in where required by the DNO or planning conditions.
AC input accepts a generator or wind turbine in addition to grid, with the inverter managing all energy flows automatically. Useful for remote installations or hybrid-fuel systems where grid supply is unreliable or non-existent.
| IDENTIFICATION | |
| Manufacturer / model | Sunsynk Ltd — SYNK-8K-SG05LP1-EU (ECCO) |
| Phase | Single-phase (L/N/PE, 230 V AC) |
| PV / DC INPUT | |
| Max. DC input power | 10,400 W |
| PV input voltage range | 125 V – 500 V |
| MPPT voltage range | 150 – 425 V |
| Start-up voltage | 125 V |
| Full load DC voltage range | 200 – 425 V |
| No. of MPPT trackers | 2 |
| Strings per MPPT | 2 + 2 |
| Max. PV input current (per MPPT) | 26 A + 26 A |
| Max. PV Isc (per MPPT) | 34 A + 34 A |
| AC OUTPUT | |
| Rated AC output power | 8,000 W |
| Max. AC output power | 8,800 W |
| Peak power (off-grid) | 2× rated for 10 seconds |
| Rated AC output current | 34.8 A |
| Max. AC output current | 38.3 A |
| Max. continuous AC passthrough | 50 A |
| Output voltage / frequency | 230 V AC L/N/PE; 50 / 60 Hz |
| THD | < 3% (linear load < 1.5%) |
| BATTERY | |
| Battery type | Lead-acid or Lithium-ion (48 V LV systems) |
| Battery voltage range | 40 – 60 V |
| Max. charging current | 190 A |
| Max. discharging current | 190 A |
| Charging curve | 3-stage / Equalisation |
| Li-ion BMS communication | Self-adaption to BMS — RS485 / CAN |
| External temperature sensor | Yes |
| EFFICIENCY | |
| Max. efficiency | 97.60% |
| MPPT efficiency | 97.00% |
| Euro (weighted) efficiency | 99.90% |
| GENERAL | |
| Cooling | Natural convection — fanless, silent (< 30 dB) |
| Operating temperature | −45 °C to +60 °C (derating above 45 °C) |
| Protection degree | IP65 |
| Dimensions (W × H × D) | 330 × 580 × 237 mm |
| Weight | 20.5 kg |
| Installation | Wall-mounted |
| GRID & CERTIFICATIONS | |
| UK grid compliance | G98, G99 |
| European compliance | CEI 0-21, VDE-AR-N 4105, IEC 62116, IEC 61727, NRS 097 |
| Safety standards | IEC/EN 62109-1, IEC/EN 62109-2, IEC/EN 61000-6-1/2/3/4 |
| Built-in protection | PV lightning, anti-islanding, reverse polarity, insulation monitoring, residual current monitoring, overcurrent, surge |
| Warranty | 5 years manufacturer |
ECCO vs standard Sunsynk 8K — what is the difference?
Both share identical PV input, battery and AC output specifications. The only hardware difference is cooling: the ECCO is fanless (natural convection, completely silent); the standard 8K uses forced-air fan cooling (louder, but tolerates higher ambient temperatures without derating). Choose the ECCO for noise-sensitive locations; choose the standard 8K for hot utility rooms or outdoor enclosures.
Which batteries are compatible?
Any 48 V LV battery in the 40–60 V range — lead-acid or lithium-ion. Tested compatible: Pylontech US2000C, US3000C, US5000, Force-L2; Sunsynk CATL 5.12–25.6 kWh; BYD LVL. BMS communication self-adapts via RS485 or CAN. High-voltage (HV) batteries are not compatible — confirm your battery voltage before ordering.
G98 or G99 — which applies to me?
G98 (notification only, no pre-approval) applies to systems exporting up to 3.68 kW. G99 (formal DNO application, pre-approval required) applies to systems exporting above 3.68 kW — which means most 8 kW installations unless zero-export mode is active. Your MCS-registered installer will confirm and submit the correct notification or application on your behalf.
Can I start without batteries and add them later?
Yes — the ECCO supports grid-tied operation without a battery. Install the inverter and PV panels now; connect a compatible 48 V LV battery bank at any point in the future. The inverter detects and configures the battery automatically on connection.
What smart tariff and app features are included?
The Sunsynk App (iOS and Android) allows configurable charge and discharge timing windows for Octopus Agile, Flux, Economy 7 or any dynamic tariff. Real-time monitoring covers PV generation, battery state of charge, grid import/export and load consumption. Zero-export mode prevents grid feed-in when required.
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Sunsynk ECCO 8kW Single Phase Hybrid Inverter SYNK-8K-SG05LP1-EU Solar Battery Storage
The Sunsynk ECCO 8kW Hybrid Inverter (model SYNK-8K-SG05LP1-EU) is a single-phase all-in-one energy management system that integrates solar PV, battery, grid and generator inputs in a single wall-mounted unit. Rated at 8,000 W continuous output (8,800 W max), it accepts up to 10,400 W DC across two independent MPPT trackers (two strings each) and can simultaneously export to the grid while charging the battery. The ECCO variant uses natural convection cooling — completely silent at all loads, with no fan noise at any point in its operating range.
Compatible with 48 V lead-acid and lithium-ion batteries (BMS self-adaption via RS485 or CAN), including Pylontech US2000/US3000/US5000, Force-L2 and Sunsynk CATL. Multiple operating modes — self-consumption, time-of-use, off-grid, grid-tied and UPS/backup — are configurable from the Sunsynk App (iOS/Android, Wi-Fi/GSM). The inverter is fully scalable: start with panels only, batteries only, or a complete hybrid system and expand at any time. Certified G98 and G99 for UK DNO notification/application. 5-year manufacturer warranty.
Two independent MPPT trackers each accept two strings at up to 26 A, with a 125–500 V operating range. Panels on different roof pitches or orientations are tracked separately — no cross-string dragging. 10.4 kWp against 8 kW AC gives effective 30% oversizing for better shoulder-period yield.
The ECCO variant has no fan — it relies entirely on natural convection for thermal management. The result is completely silent operation at all load levels, making it ideal for installations close to living or sleeping spaces, or anywhere fan cycling noise would be intrusive.
The ECCO can export to the grid and charge the battery at the same time from the same PV array. Connect up to 10.4 kWp, export 8 kW continuously and direct surplus energy to the battery — all managed simultaneously by the inverter.
High 190 A maximum charge and discharge current for fast battery cycling from surplus PV and rapid response to household peak loads. BMS self-adaption via RS485 or CAN works with Pylontech, Sunsynk CATL and most 48 V LV battery brands — no manual battery type configuration required.
Configurable for self-consumption, time-of-use (ToU), grid-tied, off-grid and UPS/backup. Charge/discharge timing windows align with Octopus Agile, Flux, Economy 7 or any dynamic tariff. Zero-export mode prevents grid feed-in where required by the DNO or planning conditions.
AC input accepts a generator or wind turbine in addition to grid, with the inverter managing all energy flows automatically. Useful for remote installations or hybrid-fuel systems where grid supply is unreliable or non-existent.
| IDENTIFICATION | |
| Manufacturer / model | Sunsynk Ltd — SYNK-8K-SG05LP1-EU (ECCO) |
| Phase | Single-phase (L/N/PE, 230 V AC) |
| PV / DC INPUT | |
| Max. DC input power | 10,400 W |
| PV input voltage range | 125 V – 500 V |
| MPPT voltage range | 150 – 425 V |
| Start-up voltage | 125 V |
| Full load DC voltage range | 200 – 425 V |
| No. of MPPT trackers | 2 |
| Strings per MPPT | 2 + 2 |
| Max. PV input current (per MPPT) | 26 A + 26 A |
| Max. PV Isc (per MPPT) | 34 A + 34 A |
| AC OUTPUT | |
| Rated AC output power | 8,000 W |
| Max. AC output power | 8,800 W |
| Peak power (off-grid) | 2× rated for 10 seconds |
| Rated AC output current | 34.8 A |
| Max. AC output current | 38.3 A |
| Max. continuous AC passthrough | 50 A |
| Output voltage / frequency | 230 V AC L/N/PE; 50 / 60 Hz |
| THD | < 3% (linear load < 1.5%) |
| BATTERY | |
| Battery type | Lead-acid or Lithium-ion (48 V LV systems) |
| Battery voltage range | 40 – 60 V |
| Max. charging current | 190 A |
| Max. discharging current | 190 A |
| Charging curve | 3-stage / Equalisation |
| Li-ion BMS communication | Self-adaption to BMS — RS485 / CAN |
| External temperature sensor | Yes |
| EFFICIENCY | |
| Max. efficiency | 97.60% |
| MPPT efficiency | 97.00% |
| Euro (weighted) efficiency | 99.90% |
| GENERAL | |
| Cooling | Natural convection — fanless, silent (< 30 dB) |
| Operating temperature | −45 °C to +60 °C (derating above 45 °C) |
| Protection degree | IP65 |
| Dimensions (W × H × D) | 330 × 580 × 237 mm |
| Weight | 20.5 kg |
| Installation | Wall-mounted |
| GRID & CERTIFICATIONS | |
| UK grid compliance | G98, G99 |
| European compliance | CEI 0-21, VDE-AR-N 4105, IEC 62116, IEC 61727, NRS 097 |
| Safety standards | IEC/EN 62109-1, IEC/EN 62109-2, IEC/EN 61000-6-1/2/3/4 |
| Built-in protection | PV lightning, anti-islanding, reverse polarity, insulation monitoring, residual current monitoring, overcurrent, surge |
| Warranty | 5 years manufacturer |
ECCO vs standard Sunsynk 8K — what is the difference?
Both share identical PV input, battery and AC output specifications. The only hardware difference is cooling: the ECCO is fanless (natural convection, completely silent); the standard 8K uses forced-air fan cooling (louder, but tolerates higher ambient temperatures without derating). Choose the ECCO for noise-sensitive locations; choose the standard 8K for hot utility rooms or outdoor enclosures.
Which batteries are compatible?
Any 48 V LV battery in the 40–60 V range — lead-acid or lithium-ion. Tested compatible: Pylontech US2000C, US3000C, US5000, Force-L2; Sunsynk CATL 5.12–25.6 kWh; BYD LVL. BMS communication self-adapts via RS485 or CAN. High-voltage (HV) batteries are not compatible — confirm your battery voltage before ordering.
G98 or G99 — which applies to me?
G98 (notification only, no pre-approval) applies to systems exporting up to 3.68 kW. G99 (formal DNO application, pre-approval required) applies to systems exporting above 3.68 kW — which means most 8 kW installations unless zero-export mode is active. Your MCS-registered installer will confirm and submit the correct notification or application on your behalf.
Can I start without batteries and add them later?
Yes — the ECCO supports grid-tied operation without a battery. Install the inverter and PV panels now; connect a compatible 48 V LV battery bank at any point in the future. The inverter detects and configures the battery automatically on connection.
What smart tariff and app features are included?
The Sunsynk App (iOS and Android) allows configurable charge and discharge timing windows for Octopus Agile, Flux, Economy 7 or any dynamic tariff. Real-time monitoring covers PV generation, battery state of charge, grid import/export and load consumption. Zero-export mode prevents grid feed-in when required.
Product Information
Product Information
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Description
The Sunsynk ECCO 8kW Hybrid Inverter (model SYNK-8K-SG05LP1-EU) is a single-phase all-in-one energy management system that integrates solar PV, battery, grid and generator inputs in a single wall-mounted unit. Rated at 8,000 W continuous output (8,800 W max), it accepts up to 10,400 W DC across two independent MPPT trackers (two strings each) and can simultaneously export to the grid while charging the battery. The ECCO variant uses natural convection cooling — completely silent at all loads, with no fan noise at any point in its operating range.
Compatible with 48 V lead-acid and lithium-ion batteries (BMS self-adaption via RS485 or CAN), including Pylontech US2000/US3000/US5000, Force-L2 and Sunsynk CATL. Multiple operating modes — self-consumption, time-of-use, off-grid, grid-tied and UPS/backup — are configurable from the Sunsynk App (iOS/Android, Wi-Fi/GSM). The inverter is fully scalable: start with panels only, batteries only, or a complete hybrid system and expand at any time. Certified G98 and G99 for UK DNO notification/application. 5-year manufacturer warranty.
Two independent MPPT trackers each accept two strings at up to 26 A, with a 125–500 V operating range. Panels on different roof pitches or orientations are tracked separately — no cross-string dragging. 10.4 kWp against 8 kW AC gives effective 30% oversizing for better shoulder-period yield.
The ECCO variant has no fan — it relies entirely on natural convection for thermal management. The result is completely silent operation at all load levels, making it ideal for installations close to living or sleeping spaces, or anywhere fan cycling noise would be intrusive.
The ECCO can export to the grid and charge the battery at the same time from the same PV array. Connect up to 10.4 kWp, export 8 kW continuously and direct surplus energy to the battery — all managed simultaneously by the inverter.
High 190 A maximum charge and discharge current for fast battery cycling from surplus PV and rapid response to household peak loads. BMS self-adaption via RS485 or CAN works with Pylontech, Sunsynk CATL and most 48 V LV battery brands — no manual battery type configuration required.
Configurable for self-consumption, time-of-use (ToU), grid-tied, off-grid and UPS/backup. Charge/discharge timing windows align with Octopus Agile, Flux, Economy 7 or any dynamic tariff. Zero-export mode prevents grid feed-in where required by the DNO or planning conditions.
AC input accepts a generator or wind turbine in addition to grid, with the inverter managing all energy flows automatically. Useful for remote installations or hybrid-fuel systems where grid supply is unreliable or non-existent.
| IDENTIFICATION | |
| Manufacturer / model | Sunsynk Ltd — SYNK-8K-SG05LP1-EU (ECCO) |
| Phase | Single-phase (L/N/PE, 230 V AC) |
| PV / DC INPUT | |
| Max. DC input power | 10,400 W |
| PV input voltage range | 125 V – 500 V |
| MPPT voltage range | 150 – 425 V |
| Start-up voltage | 125 V |
| Full load DC voltage range | 200 – 425 V |
| No. of MPPT trackers | 2 |
| Strings per MPPT | 2 + 2 |
| Max. PV input current (per MPPT) | 26 A + 26 A |
| Max. PV Isc (per MPPT) | 34 A + 34 A |
| AC OUTPUT | |
| Rated AC output power | 8,000 W |
| Max. AC output power | 8,800 W |
| Peak power (off-grid) | 2× rated for 10 seconds |
| Rated AC output current | 34.8 A |
| Max. AC output current | 38.3 A |
| Max. continuous AC passthrough | 50 A |
| Output voltage / frequency | 230 V AC L/N/PE; 50 / 60 Hz |
| THD | < 3% (linear load < 1.5%) |
| BATTERY | |
| Battery type | Lead-acid or Lithium-ion (48 V LV systems) |
| Battery voltage range | 40 – 60 V |
| Max. charging current | 190 A |
| Max. discharging current | 190 A |
| Charging curve | 3-stage / Equalisation |
| Li-ion BMS communication | Self-adaption to BMS — RS485 / CAN |
| External temperature sensor | Yes |
| EFFICIENCY | |
| Max. efficiency | 97.60% |
| MPPT efficiency | 97.00% |
| Euro (weighted) efficiency | 99.90% |
| GENERAL | |
| Cooling | Natural convection — fanless, silent (< 30 dB) |
| Operating temperature | −45 °C to +60 °C (derating above 45 °C) |
| Protection degree | IP65 |
| Dimensions (W × H × D) | 330 × 580 × 237 mm |
| Weight | 20.5 kg |
| Installation | Wall-mounted |
| GRID & CERTIFICATIONS | |
| UK grid compliance | G98, G99 |
| European compliance | CEI 0-21, VDE-AR-N 4105, IEC 62116, IEC 61727, NRS 097 |
| Safety standards | IEC/EN 62109-1, IEC/EN 62109-2, IEC/EN 61000-6-1/2/3/4 |
| Built-in protection | PV lightning, anti-islanding, reverse polarity, insulation monitoring, residual current monitoring, overcurrent, surge |
| Warranty | 5 years manufacturer |
ECCO vs standard Sunsynk 8K — what is the difference?
Both share identical PV input, battery and AC output specifications. The only hardware difference is cooling: the ECCO is fanless (natural convection, completely silent); the standard 8K uses forced-air fan cooling (louder, but tolerates higher ambient temperatures without derating). Choose the ECCO for noise-sensitive locations; choose the standard 8K for hot utility rooms or outdoor enclosures.
Which batteries are compatible?
Any 48 V LV battery in the 40–60 V range — lead-acid or lithium-ion. Tested compatible: Pylontech US2000C, US3000C, US5000, Force-L2; Sunsynk CATL 5.12–25.6 kWh; BYD LVL. BMS communication self-adapts via RS485 or CAN. High-voltage (HV) batteries are not compatible — confirm your battery voltage before ordering.
G98 or G99 — which applies to me?
G98 (notification only, no pre-approval) applies to systems exporting up to 3.68 kW. G99 (formal DNO application, pre-approval required) applies to systems exporting above 3.68 kW — which means most 8 kW installations unless zero-export mode is active. Your MCS-registered installer will confirm and submit the correct notification or application on your behalf.
Can I start without batteries and add them later?
Yes — the ECCO supports grid-tied operation without a battery. Install the inverter and PV panels now; connect a compatible 48 V LV battery bank at any point in the future. The inverter detects and configures the battery automatically on connection.
What smart tariff and app features are included?
The Sunsynk App (iOS and Android) allows configurable charge and discharge timing windows for Octopus Agile, Flux, Economy 7 or any dynamic tariff. Real-time monitoring covers PV generation, battery state of charge, grid import/export and load consumption. Zero-export mode prevents grid feed-in when required.
