--- title: "Growatt MAX 320K-X vs Growatt MAX 333K-X - Inverter Comparison | ComparePV" description: "Compare Growatt MAX 320K-X vs Growatt MAX 333K-X side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification." source: "https://comparepv.com/compare-inverters/growatt-max-320k-x/growatt-max-333k-x" updated: 2026-01-16 --- # Growatt MAX 320K-X vs Growatt MAX 333K-X 4 differences, none of them an advantage The largest is rated ac power: 13.00 kW apart. 21 of 25 comparable parameters are identical, with 7 more left out because at least one datasheet does not publish them. ## The two inverters | Attribute | A | B | | --- | --- | --- | | Inverter | [Growatt MAX 320K-X](https://comparepv.com/inverter/growatt-max-320k-x) | [Growatt MAX 333K-X](https://comparepv.com/inverter/growatt-max-333k-x) | | Manufacturer | Growatt | Growatt | | Rated AC power | 320 kW | 333 kW | | Type | Grid-tie | Grid-tie | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 320K-X | 333K-X | Difference | | --- | --- | --- | --- | | Rated AC power | 320.00 kW | 333.00 kW | 13.00 kW apart | | Max AC power | 352.00 kW | 366.30 kW | 14.30 kW apart | | Max PV power | 480.00 kW | 499.50 kW | 19.50 kW apart | | Max AC current | 230.9 A | 240.3 A | 9.4 A apart | ## Every compared parameter | Parameter | 320K-X | 333K-X | | --- | --- | --- | | Rated AC power | 320.00 kW | 333.00 kW | | Max AC power | 352.00 kW | 366.30 kW | | Grid connection | 3-phase | 3-phase | | Nominal AC voltage | 800 V | 800 V | | Max AC current | 230.9 A | 240.3 A | | Max PV power | 480.00 kW | 499.50 kW | | DC/AC ratio | 1.50 | 1.50 | | Max DC voltage | 1500 V | 1500 V | | MPPT voltage range | 500-1500 V | 500-1500 V | | Start voltage | 500 V | 500 V | | MPP trackers | 6 | 6 | | Strings per tracker | 5 | 5 | | Max input current per tracker | 80.0 A | 80.0 A | | European efficiency | 98.5 % | 98.5 % | | Max efficiency | 99.0 % | 99.0 % | | CEC efficiency | - | - | | Battery input | - | - | | Battery voltage | - | - | | Max charge current | - | - | | Backup power | - | - | | Weight | 126.0 kg | 126.0 kg | | Weight per kW | 0.4 kg/kW | 0.4 kg/kW | | Dimensions | 790x1145x371 mm | 790x1145x371 mm | | Ingress protection | IP66 | IP66 | | Cooling | forced-air | forced-air | | Noise | - | - | | Max operating temperature | 60 °C | 60 °C | | Wi-Fi | Yes | Yes | | Ethernet | - | - | | Arc fault protection | Yes | Yes | | Integrated DC switch | Yes | Yes | | Warranty | 5 yrs | 5 yrs | ## Related comparisons - [Growatt MAX 320K-X vs Sungrow SG320HX](https://comparepv.com/compare-inverters/growatt-max-320k-x/sungrow-sg320hx) - 7 differences, the largest is mpp trackers - [Growatt MAX 320K-X vs Sungrow SG350HX-US](https://comparepv.com/compare-inverters/growatt-max-320k-x/sungrow-sg350hx-us) - 8 differences, the largest is mpp trackers - [Growatt MAX 320K-X vs GoodWe GW320K-UT](https://comparepv.com/compare-inverters/growatt-max-320k-x/goodwe-gw320k-ut) - 7 differences, the largest is mpp trackers - [Growatt MAX 333K-X vs Sungrow SG333HX](https://comparepv.com/compare-inverters/growatt-max-333k-x/sungrow-sg333hx) - 8 differences, the largest is mpp trackers - [Growatt MAX 333K-X vs SolarEdge TerraMax Inverter SE330K](https://comparepv.com/compare-inverters/growatt-max-333k-x/solaredge-solaredge-terramax-inverter-se330k) - 9 differences, the largest is rated ac power - [Growatt MAX 333K-X vs SOFAR 330KTLX0](https://comparepv.com/compare-inverters/growatt-max-333k-x/sofar-solar-sofar-330ktlx0) - 9 differences, the largest is rated ac power --- Source: https://comparepv.com/compare-inverters/growatt-max-320k-x/growatt-max-333k-x Not in this file, on the page: a written summary generated on request.