Device Comparison
GoodWe DNS G3 vs Sungrow SG5.0/6.0RS vs SAJ R5-5K-T2 vs Solis S6-GR1P(2.5-6)K-S
Compare 4 solar inverter options by installation fit, monitoring, local data access, source-checked specs, and buying context.
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Which To Choose
Start with the practical fit, then read the table.
GoodWe DNS G3
Best fit when a 6 kW inverter class and backup requirements like no battery backup output or backup/EPS function documented in the reviewed GoodWe DNS G3 product page or current datasheet; treat as grid-tied PV inverter..
Sungrow SG5.0/6.0RS
Best fit when a 5 kW inverter class, backup requirements like no native backup-output support in the checked SG5.0/6.0RS string-inverter sources; backup use cases should be checked against Sungrow's SH hybrid inverter line instead., and Home Assistant or local monitoring goals.
SAJ R5-5K-T2
Best fit when a 5 kW inverter class, backup requirements like no native battery or backup output verified for this R5-5K-T2 grid-tied inverter; public-grid feed-in only in reviewed manual., and Home Assistant or local monitoring goals.
Solis S6-GR1P(2.5-6)K-S
Best fit when a 6 kW inverter class, backup requirements like not supported; grid-tied string inverter with no backup output., and Home Assistant or local monitoring goals.
Use this comparison when you are choosing between solar inverter options and need to separate practical setup fit from headline specifications.
At A Glance
Key fit signals before the full table
A quick pass over the most decision-shaping details for each device in this featured comparison.
GoodWe DNS G3
- Rated power
- 6 kW
- Max PV input
- 9 kW
- MPPT trackers
- 2
- Battery ready
- No
Sungrow SG5.0/6.0RS
- Rated power
- 5 kW
- Max PV input
- 7.5 kW
- MPPT trackers
- 2
- Battery ready
- No
SAJ R5-5K-T2
- Rated power
- 5 kW
- Max PV input
- 7.5 kW
- MPPT trackers
- 2
- Battery ready
- No
Solis S6-GR1P(2.5-6)K-S
- Rated power
- 6 kW
- Max PV input
- 9 kW
- MPPT trackers
- 2
- Battery ready
- No
Before You Decide
Checks that matter before price.
- Match rated power and MPPT layout to the roof, not just the headline inverter size.
- Check whether battery-ready really means compatible with the battery path you want.
- Look at backup behavior early, because it can change wiring and quote complexity.
- Decide whether the vendor app is enough or whether local data access matters later.
| Install fit | ||||
|---|---|---|---|---|
| Phase support | Single-phase residential grid-tied PV inverter; nominal AC output voltage 220 / 230 / 240 V. | Single-phase grid-tied inverter; datasheet lists feed-in phases / connection phases as 1 / 1. | Three-phase grid-tied output: 220/380 V, 230/400 V, or 240/415 V nominal AC ranges. | Single-phase residential solar systems |
| Installation | Wall-mounted indoor/outdoor residential PV inverter installation; IP66 enclosure with natural-convection cooling and plug-and-play AC connector. | Wall-mounted, transformerless single-phase PV grid-connected string inverter with IP65 enclosure for residential PV installations. | Wall-mounted IP65 residential rooftop PV string inverter installed by a qualified electrician. | Wall-mounted single-phase string inverter |
| Measurement | Single-phase residential grid-tied solar string inverter for PV DC-to-AC conversion with monitoring support. | Single-phase grid-tied solar string inverter converting PV DC input to AC output; monitors inverter and PV operating data through Sungrow communication options. | Three-phase grid-tied PV string inverter for DC PV-to-AC conversion, dual-MPPT PV input, and public-grid feed-in. | Inverter telemetry for PV generation and grid export status |
| Max current | Unknown | 27.3 A | 8.4 A | 27.3 A |
| Rated power | 6 kW | 5 kW | 5 kW | 6 kW |
| Inverter fit | ||||
| Max PV input | 9 kW | 7.5 kW | 7.5 kW | 9 kW |
| MPPT trackers | 2 | 2 | 2 | 2 |
| Battery ready | No | No | No | No |
| Backup support | No battery backup output or backup/EPS function documented in the reviewed GoodWe DNS G3 product page or current datasheet; treat as grid-tied PV inverter. | No native backup-output support in the checked SG5.0/6.0RS string-inverter sources; backup use cases should be checked against Sungrow's SH hybrid inverter line instead. | No native battery or backup output verified for this R5-5K-T2 grid-tied inverter; public-grid feed-in only in reviewed manual. | Not supported; grid-tied string inverter with no backup output. |
| Monitoring | ||||
| Protocol | Wi-Fi / RS485 / Modbus RTU / SunSpec / SEMS Portal | Ethernet / WLAN / RS485 / iSolarCloud | Wi-Fi / eSolar Cloud / Modbus TCP | SolisCloud |
| Local API | No | Yes | Yes | Yes |
| Cloud dependency | Optional GoodWe SEMS/app cloud for monitoring; core grid-tied PV conversion is hardware-based. | Uses Sungrow iSolarCloud for normal remote monitoring; local Ethernet / WLAN / RS485 / DI interfaces are documented, so the inverter is not cloud-only. | SAJ eSolarCloud app is standard; local Modbus TCP support may be used by integrations. | SolisCloud app is standard; local Modbus/integration options depend on installation. |
| Home Assistant | No | Yes | Yes | Yes |
| Solar fit | ||||
| Solar import/export | Yes | Yes | Yes | Yes |
| Buying context | ||||
| Price range | Unknown | Installer supplied; hardware price varies by model and region | Installer supplied; hardware price varies by model and region | Installer supplied; hardware price varies by model and region |
| Availability | Global GoodWe DNS G3 product family with regional model/certification availability; GoodWe provides Global, Europe, AMER, APAC, MEA and localized product/download routes. | Sungrow positions SG5.0/6.0RS for EU, MENA, LATAM, Australia, Southeast Asia, and related 50/60 Hz markets; local certification and distributor availability vary. | EU, AU, Asia, selected global markets | EU, UK, AU, Asia, selected global markets |
| Source check | ||||
| Last verified | Jul 22, 2026 | Jul 25, 2026 | Jun 19, 2026 | Aug 1, 2026 |
| Product page | Official page | Official page | Official page | Official page |
| Documentation | Official docs | Official docs | Official docs | Unknown |
Verdict
Start with GoodWe DNS G3 when a 6 kW inverter class and backup requirements like no battery backup output or backup/EPS function documented in the reviewed GoodWe DNS G3 product page or current datasheet; treat as grid-tied PV inverter.. Put Sungrow SG5.0/6.0RS higher on the list when a 5 kW inverter class, backup requirements like no native backup-output support in the checked SG5.0/6.0RS string-inverter sources; backup use cases should be checked against Sungrow's SH hybrid inverter line instead., and Home Assistant or local monitoring goals. For the final choice, check the full table for installation constraints, local data access, and source-verified unknowns.
FAQ
Common decision questions.
Which solar inverter should I choose?
Choose the option that matches your installation constraints and data path first. For 4 solar inverter options, the full table is most useful after you know whether local data access, cloud convenience, backup behavior, solar visibility, or expansion matters most.
What should I check before comparing prices?
Check installation fit, required accessories, official documentation, monitoring platform support, and any unknown fields in the source-checked table. Price is only useful once those constraints are clear.
Can these devices work with local dashboards or Home Assistant?
Sungrow SG5.0/6.0RS, SAJ R5-5K-T2, Solis S6-GR1P(2.5-6)K-S list Home Assistant support in the catalog. Sungrow SG5.0/6.0RS, SAJ R5-5K-T2, Solis S6-GR1P(2.5-6)K-S are marked with local API support. Confirm firmware, region, and integration maturity before treating this as a final compatibility guarantee.
Are unknown fields a reason to avoid a device?
Not always. Unknown means the field was not confirmed from the reviewed source data. Treat it as a question for the installer, reseller, or manufacturer before making a purchase decision.