--- title: "Fronius Primo 8.2-1 vs GoodWe GW8500-MS - Inverter Comparison | ComparePV" description: "Compare Fronius Primo 8.2-1 vs GoodWe GW8500-MS side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification." source: "https://comparepv.com/compare-inverters/fronius-international-fronius-primo-8-2-1/goodwe-gw8500-ms" updated: 2026-01-16 --- # Fronius Primo 8.2-1 vs GoodWe GW8500-MS 13 differences, and they point both ways The largest is rated ac power: 0.30 kW apart. 8 of 21 comparable parameters are identical, with 11 more left out because at least one datasheet does not publish them. ## The two inverters | Attribute | A | B | | --- | --- | --- | | Inverter | [Fronius Primo 8.2-1](https://comparepv.com/inverter/fronius-international-fronius-primo-8-2-1) | [GoodWe GW8500-MS](https://comparepv.com/inverter/goodwe-gw8500-ms) | | Manufacturer | Fronius International | GoodWe | | Rated AC power | 8.2 kW | 8.5 kW | | Type | Grid-tie | Grid-tie | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | Fronius Primo 8.2-1 | GW8500-MS | Difference | | --- | --- | --- | --- | | Rated AC power | 8.20 kW | 8.50 kW | 0.30 kW apart | | Max DC voltage | 1000 V | 600 V | 400 V apart | | Max input current per tracker | 33.0 A | 16.0 A | +17.0 A for Fronius Primo 8.2-1 | | Max efficiency | 97.0 % | 97.7 % | +0.7 pp for GW8500-MS | | Max AC power | 8.20 kW | 9.35 kW | 1.15 kW apart | | Weight | 21.4 kg | 22.5 kg | -1.1 kg for Fronius Primo 8.2-1 | | Max AC current | 34.2 A | 42.5 A | 8.3 A apart | | MPP trackers | 2 | 3 | +1 trackers for GW8500-MS | | Ingress protection | NEMA 4X | IP65 | NEMA 4X vs IP65 | | Nominal AC voltage | 240 V | 230 V | 10 V apart | | MPPT voltage range | 200-800 V | 80-550 V | 200-800 V vs 80-550 V | | Dimensions | 627x429x206 mm | 511x415x175 mm | 627x429x206 mm vs 511x415x175 mm | | Cooling | forced-air | natural | forced-air vs natural | ## Every compared parameter | Parameter | Fronius Primo 8.2-1 | GW8500-MS | | --- | --- | --- | | Rated AC power | 8.20 kW | 8.50 kW | | Max AC power | 8.20 kW | 9.35 kW | | Grid connection | Single-phase | Single-phase | | Nominal AC voltage | 240 V | 230 V | | Max AC current | 34.2 A | 42.5 A | | Max PV power | - | - | | DC/AC ratio | - | - | | Max DC voltage | 1000 V | 600 V | | MPPT voltage range | 200-800 V | 80-550 V | | Start voltage | 80 V | 80 V | | MPP trackers | 2 | 3 | | Strings per tracker | - | 1 | | Max input current per tracker | 33.0 A | 16.0 A | | European efficiency | - | 97.3 % | | Max efficiency | 97.0 % | 97.7 % | | CEC efficiency | 96.5 % | - | | Battery input | - | - | | Battery voltage | - | - | | Max charge current | - | - | | Backup power | - | - | | Weight | 21.4 kg | 22.5 kg | | Weight per kW | 2.6 kg/kW | 2.6 kg/kW | | Dimensions | 627x429x206 mm | 511x415x175 mm | | Ingress protection | NEMA 4X | IP65 | | Cooling | forced-air | natural | | Noise | - | - | | Max operating temperature | 60 °C | 60 °C | | Wi-Fi | Yes | Yes | | Ethernet | Yes | Yes | | Arc fault protection | Yes | Yes | | Integrated DC switch | Yes | Yes | | Warranty | 10 yrs | - | ## Related comparisons - [Fronius Primo 8.2-1 vs Growatt MOD 8000TL3-X](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-8-2-1/growatt-mod-8000tl3-x) - 16 differences, the largest is rated ac power - [Fronius Primo 8.2-1 vs Growatt MOD 8KTL3-X2(Pro)](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-8-2-1/growatt-mod-8ktl3-x2-pro) - 16 differences, the largest is rated ac power - [Fronius Primo 8.2-1 vs Sungrow SG8.0RT-20](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-8-2-1/sungrow-sg8-0rt-20) - 14 differences, the largest is rated ac power - [GoodWe GW8500-MS vs SolarEdge SE15K (Delta grid version; part no. SExxK-xxxxxbxx4)](https://comparepv.com/compare-inverters/goodwe-gw8500-ms/solaredge-se15k-delta-grid-version-part-no-sexxk-xxxxxbxx4) - 11 differences, the largest is rated ac power - [GoodWe GW8500-MS vs Growatt MOD 9000TL3-X](https://comparepv.com/compare-inverters/goodwe-gw8500-ms/growatt-mod-9000tl3-x) - 16 differences, the largest is rated ac power --- Source: https://comparepv.com/compare-inverters/fronius-international-fronius-primo-8-2-1/goodwe-gw8500-ms Not in this file, on the page: a written summary generated on request.