The Sunsynk Acure C1 3.6 kW Single-Phase Hybrid Inverter (SunC1-3.6LV01B) is the entry-level model in Sunsynk's ground-up redesigned Acure platform. Offering a 3.6 kW rated AC output with dual MPPT solar input accepting up to 7,200 W, built-in LoRa, Wi-Fi, Bluetooth and LAN, and integrated Arc Fault Detection (AFCI), the SunC1-3.6 packs a full professional feature set into a compact, fanless, IP65-rated enclosure. It is G98/G99 approved for UK grid connection and ships with a 40 A wireless Smartlynk switch in the box. Extend the inverter warranty to 10 years by pairing with a compatible Sunsynk battery.
90 A
Max Charge/Discharge
⚠ Installer Notice: The Sunsynk Acure must be installed by a qualified electrical installer. Warranty registration must be completed within 7 days of commissioning — failure to register may void the warranty.
⚡ Compatibility Note: Designed for low-voltage (LV) 48 V battery systems (40–60 V bus). Compatible with lithium-ion and lead-acid batteries via self-adapting BMS. UK grid approval: G98/G99. Wireless CT (SUNCT-RS03) and Smartlynk switch (SUNRX-RS01) sold separately — up to 2 CTs and 10 smart switches per inverter.
ℹ About the Sunsynk Acure C1: The SunC1 is the compact Acure chassis (376×530×276 mm, naturally cooled), covering 3.6–6 kW. Every Acure includes built-in Arc Fault Detection (AFCI), LoRa wireless, a colour touchscreen, a multi-colour LED status strip, Wi-Fi, Bluetooth and LAN, plus a 40 A Smartlynk wireless switch in the box.
Key Features
Dual MPPT, 500 V
Two independent MPPT trackers accept strings up to 500 V open-circuit, each handling 18+18 A operating current — ideal for separate roof aspects with no cross-shading losses.
LoRa + Wi-Fi + LAN Built In
LoRa, Wi-Fi, Bluetooth and Ethernet are all standard — no external data logger dongle needed. LoRa communicates with wireless CTs and Smartlynk switches at up to 200 m.
Built-In AFCI & Theft Alarm
Arc Fault Circuit Interrupter and solar panel tamper detection are factory-integrated. The multi-colour LED strip on the front face provides instant at-a-glance system status.
IP65 Outdoor Rated
The IP65-rated cabinet is dust-tight and water-jet resistant, supporting outdoor wall mounting without additional weatherproofing.
Natural Convection Cooling
The C1 chassis uses fanless natural convection cooling — no moving parts, no noise, and no maintenance. Operating range is –40 to +60°C with derating above 45°C.
40A Smart Switch Included
Every Acure ships with one 40 A Smartlynk wireless relay in the box, ready to control immersion heaters, EV chargers, or other loads from day one.
2× Rated Peak Power
Off-grid surge capability of 2× rated output for 10 seconds handles motor start-up loads — fridges, pumps, compressors — without nuisance trips.
5-Year Warranty (10 with Battery)
Standard 5-year inverter warranty. Pair with any compatible Sunsynk battery and the warranty extends to 10 years.
| Technical Specifications |
| Model |
SunC1-3.6LV01(W/B) |
| BATTERY INPUT |
| Battery Type |
Lead-acid or Lithium-ion |
| Battery Voltage Range |
40–60 V |
| Max. Charging Current |
90 A |
| Max. Discharging Current |
90 A |
| Charging Strategy (Li-ion) |
Self-adaption to BMS |
| Number of Battery Inputs |
1 |
| PV STRING INPUT |
| Max. PV Access Power |
7,200 W |
| Max. PV Input Power |
5,760 W |
| Max. PV Input Voltage |
500 V |
| Start-up Voltage |
125 V |
| MPPT Voltage Range |
150–425 V |
| Rated PV Input Voltage |
370 V |
| Max. Operating PV Input Current |
18+18 A |
| Max. Input Short-Circuit Current |
27+27 A |
| No. of MPPT Trackers / Strings per Tracker |
2 trackers / 1+1 strings |
| AC INPUT / OUTPUT |
| Rated AC Active Power |
3,600 W |
| Max. AC Apparent Power |
3,960 VA |
| Rated AC Current (Input / Output) |
16.4 A / 15.7 A |
| Max. AC Current (Input / Output) |
18 A / 17.3 A |
| Max. Continuous AC Passthrough (Grid→Load) |
35 A |
| Peak Power (Off-Grid) |
2× rated output, 10 s |
| Power Factor Adjustment Range |
0.8 leading – 0.8 lagging |
| Rated Voltage / Range |
220/230 V (0.85–1.1 Un) |
| Grid Frequency / Range |
50 Hz (45–55 Hz) / 60 Hz (55–65 Hz) |
| Grid Connection Form |
L + N + PE |
| THDi |
<3% of nominal power |
| DC Injection Current |
<0.5% In |
| EFFICIENCY |
| Max. Efficiency |
97.6% |
| Euro Efficiency |
96.5% |
| MPPT Efficiency |
>99% |
| GENERAL DATA |
| Operating Temperature Range |
–40 to +60°C (derating above 45°C) |
| Permissible Ambient Humidity |
0–100% |
| Max. Altitude |
2 000 m |
| Noise |
<30 dB |
| Inverter Topology |
Non-Isolated |
| Over Voltage Category |
OVC II (DC), OVC III (AC) |
| IP Rating |
IP65 |
| Cabinet Size (W×H×D) |
376×530×276 mm (excl. connectors & brackets) |
| Weight |
19.35 kg |
| Type of Cooling |
Natural Convection |
| Display |
LCD + LED |
| Communication Interface |
RS485 / RS232 / CAN |
| Monitoring |
GPRS / Wi-Fi / Bluetooth / 4G / LAN (optional) |
| Surge Protection |
Type II (DC), Type II (AC) |
| Grid Regulation |
G98/G99, NRS 097-2-1, EN 50549-1 |
| Safety / EMC Standard |
IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1/-2 |
| Warranty |
5 years (10 years when installed with a Sunsynk battery) |
Frequently Asked Questions
Does the SunC1-3.6LV01B need an external data logger?
No. Wi-Fi, Bluetooth, LAN and LoRa are all built in. The inverter connects directly to Sunsynk Connect Pro for remote monitoring — no dongle purchase required.
What batteries are compatible?
Any 48 V low-voltage lithium-ion or lead-acid battery communicating over CAN or RS485, including Sunsynk W-Series, Pylontech US3000C/US5000, Fogstar, and similar 48 V packs.
Can I install the Acure outdoors?
Yes. The IP65-rated cabinet is dust-tight and water-jet protected, making outdoor wall mounting fully supported without additional enclosures.
Is the SunC1-3.6LV01B approved for UK grid connection?
Yes. All Acure models are certified to G98/G99, EN 50549-1 and NRS 097-2-1 with integrated anti-islanding protection. G98 applies for single-phase systems up to 3.68 kW export.
What is the Smartlynk wireless switch?
The Sunsynk Smartlynk (SUNRX-RS01) is a 40 A programmable wireless relay that pairs with the Acure over LoRa to control immersion heaters, EV charger contactors, pool pumps, and similar loads. Up to 10 switches per inverter.
Does the warranty extend if I pair it with a Sunsynk battery?
Yes. The standard 5-year inverter warranty extends to 10 years when the inverter is installed with a compatible Sunsynk battery. Registration must be completed within 7 days of commissioning.
