SRNE HESP48180UH3 18kW Hybrid Inverter/Charger

The SRNE HESP48180UH3 is an 18,000W three-phase hybrid solar storage inverter designed for 48V battery systems requiring full grid-interactive operation, three independent MPPT inputs, and the output capacity to serve commercial and industrial loads. Certified to UL1741SB (2021), IEEE 1547-2018, SGIP, and CSIP, it delivers 120/208VAC three-phase output at 97.5% maximum efficiency from an IP65-rated enclosure rated for outdoor installation.

Key specifications

• Rated AC output power: 18,000W; 19,800VA max apparent power
• Off-grid peak power: 36,000VA
• AC output voltage / frequency: 120/208VAC three-phase (3L N PE); 60Hz (40–70Hz range); THD <3%
• DC system voltage: 48V nominal (40–60VDC)
• Triple MPPT solar input (2 2 2 strings): 600Vdc max PV input voltage; MPPT range 120–500Vdc; 40A max per MPPT; 28,800W max usable PV input power; 36,000W max array access power
• Max charge/discharge current: 350A
• Max grid/generator charging current: 350A
• Max bypass overload current (grid): 200A
• MPPT tracking efficiency: 99.9%
• Max efficiency: 97.5%; CEC efficiency 97%
• Power factor adjustment range: 0.8 leading to 0.8 lagging
• Battery types: Lead-acid, lithium-ion, user-defined; 2 battery inputs; self-adaption to BMS
• Communication: RS485, CAN, USB, dry contact; optional Wi-Fi/4G module
• Parallel capacity: 1–9 units (up to 162kW)
• Enclosure: IP65; heat sink intelligent air cooling; <55dB
• Operating temperature: −13°F to 140°F (−25°C to 60°C); derating above 113°F ( 45°C)
• Certifications: UL1741SB (2021), CSA C22.2 No.107.1-16, IEEE 1547-2018 & 1547a-2020 & 1547.1-2020 (SRD V2.0), UL1741 CRD-PCS, UL1699B, CEC, SGIP, CSIP
• Dimensions: 33.9 W × 18.9 H × 12.3 D in. (860 × 480 × 313 mm); 130 lbs. (59 kg)
• Warranty: 5 years

Three-phase output for commercial and industrial loads

Single-phase inverters cannot serve the three-phase loads found in commercial buildings, light manufacturing, agricultural operations, and multi-unit properties—motor drives, HVAC systems, elevators, and three-phase sub-panels all require balanced three-phase power. The HESP48180UH3 delivers native 120/208VAC three-phase output without requiring three separate single-phase units to be synchronized, simplifying installation and permitting. It also supports three-phase input and output without a neutral wire, accommodating a wider range of existing electrical infrastructure configurations.

Triple independent MPPT for large or complex arrays

Three independent MPPT trackers—each supporting two strings and accepting up to 600Vdc—allow the HESP48180UH3 to harvest from three separately oriented, shaded, or independently sized PV sub-arrays without one string's conditions degrading another's output. At 99.9% MPPT tracking efficiency and 28,800W of usable PV input capacity, the unit supports up to 1.6× array oversizing relative to rated inverter output, letting installers maximize annual energy yield by sizing the PV array for real-world production averages rather than peak inverter output.

Grid-interactive with full certification suite

The HESP48180UH3 carries one of the most comprehensive certification packages available for a 48V hybrid inverter: UL1741SB (2021) for advanced grid support functions, IEEE 1547-2018 and its 2020 amendments for utility interconnection, UL1699B for arc fault protection, and both SGIP and CSIP compliance for California incentive program eligibility. AC coupling support allows existing grid-tied PV systems to be retrofitted with battery storage without replacing the original inverter. The dual activation feature allows the unit to start up from either grid or PV power, maintaining operation even when one source is unavailable.

Application scenarios

• Commercial and light industrial: 18kW three-phase output with 36,000VA off-grid peak capacity handles motor-driven loads, HVAC, and multi-circuit commercial panels in a single unit.
• Agricultural operations: Three-phase power for irrigation pumps, grain handling equipment, and climate systems in off-grid or unreliable-grid farm settings.
• Multi-unit residential or mixed-use buildings: Three-phase distribution with battery backup and time-slot peak-valley scheduling to reduce demand charges.
• C&I solar-plus-storage: Up to nine units in parallel reach 162kW, covering small commercial facilities without the cost of medium-voltage infrastructure.
• Retrofit battery addition: AC coupling function integrates with existing grid-tied systems, adding storage without replacing installed solar equipment.

Advanced features

• Time-slot peak-valley scheduling: Programmable charge and discharge time windows allow the system to charge during off-peak utility rate periods and discharge during peak pricing hours, directly reducing demand charges and electricity costs.
• Smart load function: Intelligently manages connected loads based on available solar, battery state, and grid conditions to optimize energy use without manual intervention.
• Separate generator port: Dedicated generator input keeps generator and grid connections isolated, simplifying wiring and avoiding potential conflicts between input sources.
• Dual battery inputs: Two independent battery connection points with self-adapting BMS communication support larger or redundant battery bank configurations.

System compatibility

The HESP48180UH3 operates on a 48V battery bank across 40–60VDC and supports lead-acid, lithium-ion, and user-defined battery chemistries with BMS self-adaption for lithium packs. Grid input accepts phase voltages of 90–140VAC (line voltage 156–243VAC) at 40–70Hz. Communication interfaces include RS485, CAN, USB, and dry contact for BMS and monitoring integration; an optional Wi-Fi/4G module enables cloud connectivity for remote sites. The IP65 enclosure supports outdoor wall mounting, eliminating the need for a weatherproof equipment enclosure in most installations.

Why choose the SRNE HESP48180UH3?

The SRNE HESP48180UH3 addresses the specific requirements of commercial and industrial solar-plus-storage installations that need three-phase output, a full UL1741SB and IEEE 1547 certification suite, and the ability to scale to 162kW through parallel stacking—all from a 48V platform with a 5-year warranty. Its combination of triple independent MPPT, 350A charging current, AC coupling, smart load management, and IP65 outdoor rating makes it one of the most fully equipped three-phase hybrid inverters available at this power level through A1 SolarStore.