---
title: "Deye SUN-8K-G vs Sungrow SG8.0RT-20 - Inverter Comparison | ComparePV"
description: "Compare Deye SUN-8K-G vs Sungrow SG8.0RT-20 side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification."
source: "https://comparepv.com/compare-inverters/deye-sun-8k-g/sungrow-sg8-0rt-20"
updated: 2026-01-17
---

# Deye SUN-8K-G vs Sungrow SG8.0RT-20

14 differences, and they point both ways

The largest is european efficiency: 0.5 pp more efficient. 4 of 18 comparable parameters are identical, with 14 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [Deye SUN-8K-G](https://comparepv.com/inverter/deye-sun-8k-g) | [Sungrow SG8.0RT-20](https://comparepv.com/inverter/sungrow-sg8-0rt-20) |
| Manufacturer | Deye | Sungrow |
| Rated AC power | 8 kW | 8 kW |
| Type | Grid-tie | Grid-tie |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | SUN-8K-G | SG8.0RT-20 | Difference |
| --- | --- | --- | --- |
| European efficiency | 97.5 % | 98.0 % | +0.5 pp for SG8.0RT-20 |
| Max DC voltage | 550 V | 1100 V | 550 V apart |
| Max efficiency | 97.7 % | 98.5 % | +0.8 pp for SG8.0RT-20 |
| Max AC power | 8.80 kW | 8.00 kW | 0.80 kW apart |
| Weight | 11.0 kg | 17.0 kg | -6.0 kg for SUN-8K-G |
| Weight per kW | 1.4 kg/kW | 2.1 kg/kW | -0.8 kg/kW for SUN-8K-G |
| Grid connection | Single-phase | 3-phase | Single-phase vs 3-phase |
| Nominal AC voltage | 230 V | 400 V | 170 V apart |
| Max AC current | 38.3 A | 13.3 A | 25.0 A apart |
| Start voltage | 120 V | 180 V | -60 V for SUN-8K-G |
| Max operating temperature | 65 °C | 60 °C | +5 °C for SUN-8K-G |
| MPPT voltage range | 70-550 V | 160-1000 V | 70-550 V vs 160-1000 V |
| Dimensions | 310x330x198 mm | 480x370x195 mm | 310x330x198 mm vs 480x370x195 mm |
| Cooling | natural | forced-air | natural vs forced-air |


## Every compared parameter


| Parameter | SUN-8K-G | SG8.0RT-20 |
| --- | --- | --- |
| Rated AC power | 8.00 kW | 8.00 kW |
| Max AC power | 8.80 kW | 8.00 kW |
| Grid connection | Single-phase | 3-phase |
| Nominal AC voltage | 230 V | 400 V |
| Max AC current | 38.3 A | 13.3 A |
| Max PV power | 10.40 kW | - |
| DC/AC ratio | 1.30 | - |
| Max DC voltage | 550 V | 1100 V |
| MPPT voltage range | 70-550 V | 160-1000 V |
| Start voltage | 120 V | 180 V |
| MPP trackers | 2 | 2 |
| Strings per tracker | - | 1 |
| Max input current per tracker | - | 25.0 A |
| European efficiency | 97.5 % | 98.0 % |
| Max efficiency | 97.7 % | 98.5 % |
| CEC efficiency | - | - |
| Battery input | - | - |
| Battery voltage | - | - |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 11.0 kg | 17.0 kg |
| Weight per kW | 1.4 kg/kW | 2.1 kg/kW |
| Dimensions | 310x330x198 mm | 480x370x195 mm |
| Ingress protection | IP65 | IP65 |
| Cooling | natural | forced-air |
| Noise | 25 dB | - |
| Max operating temperature | 65 °C | 60 °C |
| Wi-Fi | Yes | - |
| Ethernet | Yes | - |
| Arc fault protection | - | - |
| Integrated DC switch | Yes | Yes |
| Warranty | - | - |


## Related comparisons

- [Deye SUN-8K-G vs Growatt MOD 8000TL3-X](https://comparepv.com/compare-inverters/deye-sun-8k-g/growatt-mod-8000tl3-x) - 16 differences, the largest is european efficiency
- [Deye SUN-8K-G vs Growatt MOD 8KTL3-X2(Pro)](https://comparepv.com/compare-inverters/deye-sun-8k-g/growatt-mod-8ktl3-x2-pro) - 16 differences, the largest is european efficiency
- [Deye SUN-8K-G vs GoodWe GW8000-DT](https://comparepv.com/compare-inverters/deye-sun-8k-g/goodwe-gw8000-dt) - 13 differences, the largest is european efficiency
- [Sungrow SG8.0RT-20 vs Ginlong Solis S6-GR3P-8K02-NV-ND](https://comparepv.com/compare-inverters/sungrow-sg8-0rt-20/ginlong-solis-s6-gr3p-8k02-nv-nd) - 8 differences, the largest is max input current per tracker


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Source: https://comparepv.com/compare-inverters/deye-sun-8k-g/sungrow-sg8-0rt-20

Not in this file, on the page: a written summary generated on request.