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 battery input or backup/EPS output is documented for the SG5.0/6.0RS grid-tied string-inverter family., 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 input or backup/EPS output is documented for the R5-5K-T2; it is a public-grid-connected PV inverter., 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 at 50 / 60 Hz. | Single-phase, one feed-in phase / one connection phase; 220/230/240 V rated AC, 154-276 V operating range, 50/60 Hz. | Three-phase 3L+N+PE; 220/380 V, 230/400 V or 240/415 V nominal; 180-280 V L-N / 312-485 V L-L; 50/60 Hz. | Single-phase grid-tied family: 2.5, 3, 3.6, 4, 4.6, 5 and 6 kW models. |
| Installation | Wall-mounted indoor/outdoor residential PV inverter installation; IP66 enclosure with natural-convection cooling and plug-and-play AC connector. | Wall-mounted, transformerless residential PV string inverter; IP65 enclosure, natural cooling, 410 x 270 x 150 mm, 10 kg. | Wall-mounted, transformerless IP65 residential rooftop PV string inverter; rear-panel mounting and AC/DC/grid connection require a qualified technician. | Wall-mounted IP66 residential string inverter; fixed AC/DC wiring by a qualified installer. |
| Measurement | Single-phase residential grid-tied solar string inverter for PV DC-to-AC conversion with monitoring support. | Single-phase grid-tied PV DC-to-AC conversion with inverter/PV operating-data monitoring, active/reactive power control, and power-ramp-rate control. | Three-phase grid-tied PV string inverter converting DC PV input to 3L+N+PE AC grid feed-in through two independent MPPT trackers. | PV generation telemetry, export-power control and 24-hour load-consumption monitoring when paired with the required Solis meter/EPM and monitoring accessory. |
| 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 battery input or backup/EPS output is documented for the SG5.0/6.0RS grid-tied string-inverter family. | No native battery input or backup/EPS output is documented for the R5-5K-T2; it is a public-grid-connected PV inverter. | Not supported; grid-tied string inverter with no backup output. |
| Monitoring | ||||
| Protocol | Wi-Fi / RS485 / Modbus RTU / SunSpec / SEMS Portal | Ethernet / WLAN / RS485 / iSolarCloud | RS232 (USB) / RS485 (RJ45) / optional Wi-Fi, GPRS or 4G / supported local web interface | 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. | Optional eSolarCloud; compatible modules can expose local web monitoring. | 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 | GoodWe currently lists DNS G3 through global, EMEA, Australia and selected localized catalogs; exact model availability, certification and grid-code approval vary by market. | EU, MENA, LATAM, Australia, Southeast Asia, and other supported 50/60 Hz markets; certification, model suffix, stock, and distributor coverage vary by country. | Global SAJ markets; installer availability, grid-code approval, certification and exact suffix vary by country. | EU, UK, AU, Asia, selected global markets |
| Source check | ||||
| Last verified | Sep 24, 2026 | Sep 25, 2026 | Sep 20, 2026 | Oct 3, 2026 |
| Product page | Official page | Official page | Official page | Official page |
| Documentation | Official docs | Official docs | Official docs | Official docs |
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 battery input or backup/EPS output is documented for the SG5.0/6.0RS grid-tied string-inverter family., 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.