Skip to main content
SG3.6RS vs Fronius Primo 3.6-1 12 of 24 identical Swap Change inverters

Sungrow SG3.6RS vs Fronius Primo 3.6-1

Sungrow SG3.6RS
Sungrow
SG3.6RS
3.68 kW 97.0 % euro Grid-tie
Open inverter page Datasheet PDF
VS
Fronius Primo 3.6-1
Fronius International
Fronius Primo 3.6-1
3.68 kW 96.8 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

SG3.6RS leads on the differences that matter

The largest is max dc voltage: 400 V apart. 12 of 24 comparable parameters are identical, with 8 more left out because at least one datasheet does not publish them.

See all 12 differences
How alike are they
12 of 24 comparable
parameters are identical
identical differs not published
01

What actually differs

12 of 24 parameters
Parameter SG3.6RS Fronius Primo 3.6-1 Difference
Max DC voltage 600 V 1000 V 400 V apart
Max input current per tracker 16.0 A 18.0 A 2.0 A more headroom
Weight 10.0 kg 21.5 kg 11.5 kg lighter
Weight per kW 2.7 kg/kW 5.8 kg/kW 3.1 kg/kW lighter
European efficiency 97.0 % 96.8 % 0.2 pp more efficient
Max operating temperature 60 °C 55 °C 5 °C more heat tolerant
Start voltage 50 V 80 V 30 V earlier start
MPPT voltage range 40-560 V 80-800 V 40-560 V vs 80-800 V
Max PV power 5.40 kW 5.50 kW 0.10 kW apart
Strings per tracker 1 2 1 string apart
Dimensions 270x410x150 mm 645x431x204 mm 270x410x150 mm vs 645x431x204 mm
Cooling natural forced-air natural vs forced-air
02

Full specification

Parameter SG3.6RS Fronius Primo 3.6-1 Difference
AC output
Rated AC power 3.68 kW 3.68 kW Same
Max AC power 3.68 kW 3.68 kW Same
Grid connection Single-phase Single-phase Same
Nominal AC voltage 230 V 230 V Same
Max AC current 16.0 A 16.0 A Same
PV input
Max PV power 5.40 kW 5.50 kW 0.10 kW apart
DC/AC ratio 1.47 1.50 Effectively the same
Max DC voltage 600 V 1000 V 400 V apart
MPPT voltage range 40-560 V 80-800 V 40-560 V vs 80-800 V
Start voltage 50 V 80 V -30 V for SG3.6RS
MPP trackers 2 2 Same
Strings per tracker 1 2 1 string apart
Max input current per tracker 16.0 A 18.0 A +2.0 A for Fronius Primo 3.6-1
Efficiency
European efficiency 97.0 % 96.8 % +0.2 pp for SG3.6RS
Max efficiency 97.9 % 98.0 % Effectively the same
CEC efficiency - - Neither datasheet publishes this
Battery
Battery input - - Neither datasheet publishes this
Battery voltage - - Neither datasheet publishes this
Max charge current - - Neither datasheet publishes this
Backup power - - Neither datasheet publishes this
Physical
Weight 10.0 kg 21.5 kg -11.5 kg for SG3.6RS
Weight per kW 2.7 kg/kW 5.8 kg/kW -3.1 kg/kW for SG3.6RS
Dimensions 270x410x150 mm 645x431x204 mm 270x410x150 mm vs 645x431x204 mm
Ingress protection IP65 IP65 Same
Cooling natural forced-air natural vs forced-air
Noise - - Neither datasheet publishes this
Max operating temperature 60 °C 55 °C +5 °C for SG3.6RS
Connectivity and safety
Wi-Fi Yes Yes Same
Ethernet Yes Yes Same
Arc fault protection Yes - Not published by Fronius International
Integrated DC switch Yes Yes Same
Warranty
Warranty - - Neither datasheet publishes this
03

More useful comparisons

Open all inverters
Same type, similar size
SolarEdge
Sungrow SG3.6RS vs SolarEdge EV Charging Single Phase Inverter SE3680H (aka H3680SE / SE3680H)
6 differences, the largest is european efficiency
Same type, similar size
SolarEdge
Sungrow SG3.6RS vs SolarEdge SE3680H (HD‑Wave, single phase)
8 differences, the largest is european efficiency
Same type, similar size
SMA Solar
Sungrow SG3.6RS vs SMA Solar SB3.6-1AV-41 (Sunny Boy 3.6)
10 differences, the largest is european efficiency
04

Written summary

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate.