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Fronius Primo 3.6-1 vs SB3.6-1AV-41 (Sunny Boy 3.6) 13 of 24 identical Swap Change inverters

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

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
VS
SMA Solar SB3.6-1AV-41 (Sunny Boy 3.6)
SMA Solar
SB3.6-1AV-41 (Sunny Boy 3.6)
3.68 kW 96.5 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

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.

See all 11 differences
How alike are they
13 of 24 comparable
parameters are identical
identical differs not published
01

What actually differs

11 of 24 parameters
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 more headroom
Max efficiency 98.0 % 97.0 % 1.0 pp more efficient
Weight 21.5 kg 17.5 kg 4.0 kg lighter
Weight per kW 5.8 kg/kW 4.8 kg/kW 1.1 kg/kW lighter
European efficiency 96.8 % 96.5 % 0.3 pp more efficient
Start voltage 80 V 125 V 45 V earlier start
Max operating temperature 55 °C 60 °C 5 °C more heat tolerant
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
02

Full specification

Parameter Fronius Primo 3.6-1 SB3.6-1AV-41 (Sunny Boy 3.6) 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 5.50 kW 5.50 kW Same
DC/AC ratio 1.50 1.50 Same
Max DC voltage 1000 V 600 V 400 V apart
MPPT voltage range 80-800 V 110-500 V 80-800 V vs 110-500 V
Start voltage 80 V 125 V -45 V for Fronius Primo 3.6-1
MPP trackers 2 2 Same
Strings per tracker 2 2 Same
Max input current per tracker 18.0 A 15.0 A +3.0 A for Fronius Primo 3.6-1
Efficiency
European efficiency 96.8 % 96.5 % +0.3 pp for Fronius Primo 3.6-1
Max efficiency 98.0 % 97.0 % +1.0 pp for Fronius Primo 3.6-1
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 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)
Dimensions 645x431x204 mm 470x435x176 mm 645x431x204 mm vs 470x435x176 mm
Ingress protection IP65 IP65 Same
Cooling forced-air natural forced-air vs natural
Noise - 25 dB Not published by Fronius International
Max operating temperature 55 °C 60 °C +5 °C for SB3.6-1AV-41 (Sunny Boy 3.6)
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 - 5 yrs Not published by Fronius International
03

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04

Written summary

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