---
title: "Growatt SPF 3500 ES vs SMA Solar SI4.4M-13 - Inverter Comparison | ComparePV"
description: "Compare Growatt SPF 3500 ES 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/growatt-spf-3500-es/sma-solar-si4-4m-13"
updated: 2026-01-16
---

# Growatt SPF 3500 ES vs SMA Solar SI4.4M-13

11 differences, and they point both ways

The largest is rated ac power: 0.20 kW apart. 3 of 14 comparable parameters are identical, with 18 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [Growatt SPF 3500 ES](https://comparepv.com/inverter/growatt-spf-3500-es) | [SMA Solar SI4.4M-13](https://comparepv.com/inverter/sma-solar-si4-4m-13) |
| Manufacturer | Growatt | SMA Solar |
| Rated AC power | 3.5 kW | 3.3 kW |
| Type | Off-grid | Off-grid |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | SPF 3500 ES | SI4.4M-13 | Difference |
| --- | --- | --- | --- |
| Rated AC power | 3.50 kW | 3.30 kW | 0.20 kW apart |
| Max DC voltage | 450 V | 63 V | 387 V apart |
| Max efficiency | 93.0 % | 95.5 % | +2.5 pp for SI4.4M-13 |
| Max AC power | 3.50 kW | 5.50 kW | 2.00 kW apart |
| Weight | 11.5 kg | 44.0 kg | -32.5 kg for SPF 3500 ES |
| Weight per kW | 3.3 kg/kW | 13.3 kg/kW | -10.0 kg/kW for SPF 3500 ES |
| Max operating temperature | 55 °C | 60 °C | +5 °C for SI4.4M-13 |
| Ingress protection | IP20 | IP54 | IP20 vs IP54 |
| MPPT voltage range | 120-430 V | 41-63 V | 120-430 V vs 41-63 V |
| Battery voltage | 48VDC | 41-63 V (48 V nominal) | 48VDC vs 41-63 V (48 V nominal) |
| Dimensions | 485x330x135 mm | 612x467x242 mm | 485x330x135 mm vs 612x467x242 mm |


## Every compared parameter


| Parameter | SPF 3500 ES | SI4.4M-13 |
| --- | --- | --- |
| Rated AC power | 3.50 kW | 3.30 kW |
| Max AC power | 3.50 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 | 4.50 kW | - |
| DC/AC ratio | 1.29 | - |
| Max DC voltage | 450 V | 63 V |
| MPPT voltage range | 120-430 V | 41-63 V |
| Start voltage | - | - |
| MPP trackers | 1 | - |
| Strings per tracker | 1 | - |
| Max input current per tracker | - | - |
| European efficiency | - | - |
| Max efficiency | 93.0 % | 95.5 % |
| CEC efficiency | - | - |
| Battery input | Yes | Yes |
| Battery voltage | 48VDC | 41-63 V (48 V nominal) |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 11.5 kg | 44.0 kg |
| Weight per kW | 3.3 kg/kW | 13.3 kg/kW |
| Dimensions | 485x330x135 mm | 612x467x242 mm |
| Ingress protection | IP20 | 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

- [Growatt SPF 3500 ES vs Easun Power ISolar SMR II 3.5KW](https://comparepv.com/compare-inverters/growatt-spf-3500-es/easun-power-isolar-smr-ii-3-5kw) - 7 differences, the largest is max dc voltage
- [Growatt SPF 3500 ES vs Easun Power ISolar MLV 3.5KW-U](https://comparepv.com/compare-inverters/growatt-spf-3500-es/easun-power-isolar-mlv-3-5kw-u) - 5 differences, the largest is weight
- [Growatt SPF 3500 ES vs Easun Power LSOLAR SML-II-3.6KW](https://comparepv.com/compare-inverters/growatt-spf-3500-es/easun-power-lsolar-sml-ii-3-6kw) - 11 differences, the largest is max dc voltage
- [SMA Solar SI4.4M-13 vs Easun Power ISolar SPL 4K](https://comparepv.com/compare-inverters/sma-solar-si4-4m-13/easun-power-isolar-spl-4k) - 7 differences, the largest is max efficiency


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Source: https://comparepv.com/compare-inverters/growatt-spf-3500-es/sma-solar-si4-4m-13

Not in this file, on the page: a written summary generated on request.