Sungrow Inverter Calculator
World's #1 inverter manufacturer — enter system kWp and application type (residential string, hybrid with battery, commercial 3-phase, or utility-scale) to get the right Sungrow SG or SH model, 98.4% peak efficiency, cost ($0.10–0.18/W), and 10/15-year warranty details.
| Metric | Value |
|---|---|
| Recommended model | SG3K-D (3 kW residential single-phase) |
| Units needed | 2 inverter(s) |
| Inverter rated output | 3 kW |
| Phase configuration | 1-phase |
| MPPT inputs | 2 MPPT channels |
| Hybrid/battery capable | No — string inverter only |
| Peak efficiency | 97.5% |
| Cost range | $600 – $840 |
| Cost per watt | $0.12/W (competitive value) |
| Warranty | 10 years |
| Market position | World #1 inverter manufacturer by shipment (2024) |
| Monitoring | iSolarCloud — real-time data, mobile app, web portal |
| Model description | Entry residential string inverter — 2 MPPT, compact, plug-and-play for small rooftops |
How to Use This Calculator
Enter your system size and application
Enter your total solar array capacity in kWp and select the application type. Residential string inverters (SG series) are grid-tied without battery management. Hybrid inverters (SH series) include a built-in battery charge controller for storage. Commercial 3-phase models (SG-CX series) are designed for rooftops above 20 kW. The calculator selects the closest Sungrow model for your size and application.
Understand MPPT count
MPPT (Maximum Power Point Tracking) channels determine how many independent string directions your inverter can handle. 2 MPPT = good for a single roof face. 3–4 MPPT = multiple roof faces or shading zones. 12 MPPT (SG110CX) = commercial arrays with many string orientations. More MPPTs mean better shade tolerance and flexibility in panel placement.
Hybrid vs string models
Sungrow's SH series hybrid inverters include a DC-coupled battery port for Sungrow SBR batteries. They also support third-party batteries via AC-coupled configurations. If you plan to add batteries now or in the future, the SH series eliminates the need for a separate battery inverter — a meaningful cost and space saving.
The Formula
Sungrow recommends sizing the inverter at 90–125% of panel DC capacity (DC/AC ratio 0.8–1.25). A 10 kWp panel array typically uses a 8–10 kW inverter. Under-sizing (higher DC/AC ratio) clips peak production but increases utilization and is often economically optimal. The calculator shows the closest standard Sungrow model without over-engineering the specification.
Example
Ava — 8 kWp hybrid system with battery, single-phase
Ava has an 8 kWp south-facing rooftop array and wants a Sungrow hybrid inverter to connect Sungrow SBR lithium batteries for overnight self-consumption.
Results
The SH8RT is Sungrow's most popular hybrid model for medium residential installs. At $0.16/W, it is meaningfully cheaper than equivalent Fronius or SolarEdge hybrid inverters while offering comparable features. The built-in battery management eliminates the need for a separate battery inverter when adding Sungrow SBR storage.
Sungrow Model Comparison
| Spec | SG3K-D | SH8RT | SG33CX | SG110CX |
|---|---|---|---|---|
| Output (kW) | 3 | 8 | 33 | 110 |
| Phase | 1-phase | 1-phase | 3-phase | 3-phase |
| Hybrid | No | Yes | No | No |
| Peak efficiency | 97.5% | 97.8% | 98.4% | 98.6% |
| $/W approx. | $0.12 | $0.16 | $0.11 | $0.10 |
FAQ
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