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☀️ Sungrow SG-HX · 1500V DC · 175-352 kW

Utility-Scale 1500V Inverters

High-voltage 1500V DC string inverters for utility-scale PV plants and ground-mount projects. Motorized DC switch, 24h DC insulation monitoring, IP66 outdoor rating, designed for solar farms 1 MW and above.

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Utility-Scale Lineup

Utility-Scale Sungrow inverter models

Utility 1500V DC string inverters — 175 kW to 352 kW for solar farms

1 Utility Models
Sungrow SG320HX-20 inverter
Utility-scale 1500V

Sungrow SG320HX-20

320 kW · 12 MPPT · IP66
320
kW AC
99.0%
efficiency
IP66
enclosure
View specifications
Sungrow SG320HX utility-scale inverter

Why Sungrow 1500V for utility-scale?

Sungrow leads the global utility-scale 1500V inverter market — powering 200+ GW of installed solar farms in 170+ countries. The SG-HX platform is the engineering-grade choice for utility-scale string-inverter architecture.

1500V DC architecture cuts BOS (balance-of-system) costs by ~15% vs. 1000V — fewer combiner boxes, smaller cable cross-sections, longer string lengths. The SG-HX platform adds motorized DC switch for safe maintenance, 24h DC insulation monitoring for fault detection, and IP66 rating for desert and coastal environments.

Selection Guide

Utility-Scale inverters — engineering FAQ

Questions our customers ask before placing an order. Sized for engineers, not marketing copy.

What is the difference between 1000V and 1500V solar inverters?
1500V DC allows longer PV strings (typically 27-30 panels per string vs. 18-20 at 1000V), which reduces combiner boxes, DC cable runs, and labor. For utility-scale PV (>1 MW), 1500V architecture cuts BOS cost by ~15% and is now the standard.
Which SG-HX model for a 5 MW solar farm?
A 5 MW project typically uses 14-16 units of SG350HX (352 kW each). Each unit covers ~325 kWp of DC capacity at 1.3 DC/AC ratio. Combined with central MV transformer pads for utility interconnect.
Does the SG-HX support utility grid code compliance?
Yes — supports IEEE 1547-2018, IEEE 2800-2022, EN 50549, GB/T 19964 (China), and most utility-specific grid codes. LVRT/HVRT, reactive power Q(V), volt-var and frequency-watt all supported. Custom grid profiles configurable via SunAccess.
What is 24h DC insulation monitoring?
A continuous fault-detection system that measures PV array insulation resistance to ground every cycle. Detects degraded cables, water ingress in connectors, or panel-to-frame faults early — before they cause arc faults or fires. Required by EN 61557-8 for installations >1500V DC.
What's the SG-HX warranty and serviceability?
5 years standard, extendable to 25 years. Modular hot-swap design — main power module, control board, and AC contactor can all be field-replaced. We supply with valid Sungrow OEM warranty registration; serviceable through Sungrow global service network in 60+ countries.

Ready to spec your utility-scale system?

Send the system size, climate zone, and grid spec — we will reply with a model recommendation, datasheet, and CIF/FOB quote within 24 hours.

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