--- title: "Easun Power ISolar SPL 4K vs SMA Solar SI4.4M-13 - Inverter Comparison | ComparePV" description: "Compare Easun Power ISolar SPL 4K vs SMA Solar SI4.4M-13 side by side: what actually differs, efficiency, MPP trackers, battery input and the full specification." source: "https://comparepv.com/compare-inverters/easun-power-isolar-spl-4k/sma-solar-si4-4m-13" updated: 2026-01-19 --- # Easun Power ISolar SPL 4K vs SMA Solar SI4.4M-13 7 differences, and they point both ways The largest is max efficiency: 2.5 pp more efficient. 3 of 10 comparable parameters are identical, with 22 more left out because at least one datasheet does not publish them. ## The two inverters | Attribute | A | B | | --- | --- | --- | | Inverter | [Easun Power ISolar SPL 4K](https://comparepv.com/inverter/easun-power-isolar-spl-4k) | [SMA Solar SI4.4M-13](https://comparepv.com/inverter/sma-solar-si4-4m-13) | | Manufacturer | Easun Power | SMA Solar | | Rated AC power | 3.2 kW | 3.3 kW | | Type | Off-grid | Off-grid | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | ISolar SPL 4K | SI4.4M-13 | Difference | | --- | --- | --- | --- | | Max efficiency | 93.0 % | 95.5 % | +2.5 pp for SI4.4M-13 | | Rated AC power | 3.20 kW | 3.30 kW | 0.10 kW apart | | Max AC power | 3.20 kW | 5.50 kW | 2.30 kW apart | | Weight | 9.8 kg | 44.0 kg | -34.2 kg for ISolar SPL 4K | | Weight per kW | 3.1 kg/kW | 13.3 kg/kW | -10.3 kg/kW for ISolar SPL 4K | | Max operating temperature | 55 °C | 60 °C | +5 °C for SI4.4M-13 | | Dimensions | 468x295x120 mm | 612x467x242 mm | 468x295x120 mm vs 612x467x242 mm | ## Every compared parameter | Parameter | ISolar SPL 4K | SI4.4M-13 | | --- | --- | --- | | Rated AC power | 3.20 kW | 3.30 kW | | Max AC power | 3.20 kW | 5.50 kW | | Grid connection | Single-phase | Single-phase | | Nominal AC voltage | 230 V | 230 V | | Max AC current | - | 60.0 A | | Max PV power | - | - | | DC/AC ratio | - | - | | Max DC voltage | - | 63 V | | MPPT voltage range | - | 41-63 V | | Start voltage | - | - | | MPP trackers | - | - | | Strings per tracker | - | - | | Max input current per tracker | - | - | | European efficiency | - | - | | Max efficiency | 93.0 % | 95.5 % | | CEC efficiency | - | - | | Battery input | Yes | Yes | | Battery voltage | - | 41-63 V (48 V nominal) | | Max charge current | - | - | | Backup power | - | - | | Weight | 9.8 kg | 44.0 kg | | Weight per kW | 3.1 kg/kW | 13.3 kg/kW | | Dimensions | 468x295x120 mm | 612x467x242 mm | | Ingress protection | - | IP54 | | Cooling | - | - | | Noise | - | - | | Max operating temperature | 55 °C | 60 °C | | Wi-Fi | - | - | | Ethernet | - | Yes | | Arc fault protection | - | - | | Integrated DC switch | - | - | | Warranty | - | 10 yrs | ## Related comparisons - [Easun Power ISolar SPL 4K vs Growatt SPF 3000 ES](https://comparepv.com/compare-inverters/easun-power-isolar-spl-4k/growatt-spf-3000-es) - 5 differences, the largest is rated ac power - [Easun Power ISolar SPL 4K vs Growatt SPF 3000TL HVM-24](https://comparepv.com/compare-inverters/easun-power-isolar-spl-4k/growatt-spf-3000tl-hvm-24) - 5 differences, the largest is rated ac power - [Easun Power ISolar SPL 4K vs Growatt SPF 3000TL HVM-48](https://comparepv.com/compare-inverters/easun-power-isolar-spl-4k/growatt-spf-3000tl-hvm-48) - 5 differences, the largest is rated ac power - [SMA Solar SI4.4M-13 vs Growatt SPF 3500 ES](https://comparepv.com/compare-inverters/sma-solar-si4-4m-13/growatt-spf-3500-es) - 11 differences, the largest is rated ac power - [SMA Solar SI4.4M-13 vs Easun Power ISolar SMR II 3.5KW](https://comparepv.com/compare-inverters/sma-solar-si4-4m-13/easun-power-isolar-smr-ii-3-5kw) - 9 differences, the largest is rated ac power - [SMA Solar SI4.4M-13 vs Easun Power ISolar MLV 3.5KW-U](https://comparepv.com/compare-inverters/sma-solar-si4-4m-13/easun-power-isolar-mlv-3-5kw-u) - 5 differences, the largest is rated ac power --- Source: https://comparepv.com/compare-inverters/easun-power-isolar-spl-4k/sma-solar-si4-4m-13 Not in this file, on the page: a written summary generated on request.