---
title: "Fronius Primo 3.6-1 vs SMA Solar SB3.6-1AV-41 (Sunny Boy 3.6) - Inverter Comparison | ComparePV"
description: "Compare Fronius Primo 3.6-1 vs SMA Solar SB3.6-1AV-41 (Sunny Boy 3.6) 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-3-6-1/sma-solar-sb3-6-1av-41-sunny-boy-3-6"
updated: 2026-01-16
---

# Fronius Primo 3.6-1 vs SMA Solar SB3.6-1AV-41 (Sunny Boy 3.6)

Fronius Primo 3.6-1 leads on the differences that matter

The largest is max dc voltage: 400 V apart. 13 of 24 comparable parameters are identical, with 8 more left out because at least one datasheet does not publish them.


## The two inverters


| Attribute | A | B |
| --- | --- | --- |
| Inverter | [Fronius Primo 3.6-1](https://comparepv.com/inverter/fronius-international-fronius-primo-3-6-1) | [SMA Solar SB3.6-1AV-41 (Sunny Boy 3.6)](https://comparepv.com/inverter/sma-solar-sb3-6-1av-41-sunny-boy-3-6) |
| Manufacturer | Fronius International | SMA Solar |
| Rated AC power | 3.68 kW | 3.68 kW |
| Type | Grid-tie | Grid-tie |


## Where they differ

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


| Parameter | Fronius Primo 3.6-1 | SB3.6-1AV-41 (Sunny Boy 3.6) | Difference |
| --- | --- | --- | --- |
| Max DC voltage | 1000 V | 600 V | 400 V apart |
| Max input current per tracker | 18.0 A | 15.0 A | +3.0 A for Fronius Primo 3.6-1 |
| Max efficiency | 98.0 % | 97.0 % | +1.0 pp for Fronius Primo 3.6-1 |
| Weight | 21.5 kg | 17.5 kg | -4.0 kg for SB3.6-1AV-41 (Sunny Boy 3.6) |
| Weight per kW | 5.8 kg/kW | 4.8 kg/kW | -1.1 kg/kW for SB3.6-1AV-41 (Sunny Boy 3.6) |
| European efficiency | 96.8 % | 96.5 % | +0.3 pp for Fronius Primo 3.6-1 |
| Start voltage | 80 V | 125 V | -45 V for Fronius Primo 3.6-1 |
| Max operating temperature | 55 °C | 60 °C | +5 °C for SB3.6-1AV-41 (Sunny Boy 3.6) |
| MPPT voltage range | 80-800 V | 110-500 V | 80-800 V vs 110-500 V |
| Dimensions | 645x431x204 mm | 470x435x176 mm | 645x431x204 mm vs 470x435x176 mm |
| Cooling | forced-air | natural | forced-air vs natural |


## Every compared parameter


| Parameter | Fronius Primo 3.6-1 | SB3.6-1AV-41 (Sunny Boy 3.6) |
| --- | --- | --- |
| Rated AC power | 3.68 kW | 3.68 kW |
| Max AC power | 3.68 kW | 3.68 kW |
| Grid connection | Single-phase | Single-phase |
| Nominal AC voltage | 230 V | 230 V |
| Max AC current | 16.0 A | 16.0 A |
| Max PV power | 5.50 kW | 5.50 kW |
| DC/AC ratio | 1.50 | 1.50 |
| Max DC voltage | 1000 V | 600 V |
| MPPT voltage range | 80-800 V | 110-500 V |
| Start voltage | 80 V | 125 V |
| MPP trackers | 2 | 2 |
| Strings per tracker | 2 | 2 |
| Max input current per tracker | 18.0 A | 15.0 A |
| European efficiency | 96.8 % | 96.5 % |
| Max efficiency | 98.0 % | 97.0 % |
| CEC efficiency | - | - |
| Battery input | - | - |
| Battery voltage | - | - |
| Max charge current | - | - |
| Backup power | - | - |
| Weight | 21.5 kg | 17.5 kg |
| Weight per kW | 5.8 kg/kW | 4.8 kg/kW |
| Dimensions | 645x431x204 mm | 470x435x176 mm |
| Ingress protection | IP65 | IP65 |
| Cooling | forced-air | natural |
| Noise | - | 25 dB |
| Max operating temperature | 55 °C | 60 °C |
| Wi-Fi | Yes | Yes |
| Ethernet | Yes | Yes |
| Arc fault protection | - | Yes |
| Integrated DC switch | Yes | Yes |
| Warranty | - | 5 yrs |


## Related comparisons

- [Fronius Primo 3.6-1 vs SolarEdge EV Charging Single Phase Inverter SE3680H (aka H3680SE / SE3680H)](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-3-6-1/solaredge-solaredge-ev-charging-single-phase-inverter-se3680h-aka-h3680se-se3680h) - 10 differences, the largest is european efficiency
- [Fronius Primo 3.6-1 vs SolarEdge SE3680H (HD‑Wave, single phase)](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-3-6-1/solaredge-solaredge-se3680h-hd-wave-single-phase) - 10 differences, the largest is european efficiency
- [Fronius Primo 3.6-1 vs Sungrow SG3.6RS](https://comparepv.com/compare-inverters/fronius-international-fronius-primo-3-6-1/sungrow-sg3-6rs) - 12 differences, the largest is max dc voltage


---

Source: https://comparepv.com/compare-inverters/fronius-international-fronius-primo-3-6-1/sma-solar-sb3-6-1av-41-sunny-boy-3-6

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