Skip to main content
Fronius Symo 17.5-3 480 vs SUN-18K-G02 6 of 16 identical Swap Change inverters

Fronius Symo 17.5-3 480 vs Deye SUN-18K-G02

Fronius Symo 17.5-3 480
Fronius International
Fronius Symo 17.5-3 480
17.495 kW Grid-tie
Open inverter page Datasheet PDF
VS
Deye
SUN-18K-G02
18 kW 97.8 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

SUN-18K-G02 leads on the differences that matter

The largest is rated ac power: 0.50 kW apart. 6 of 16 comparable parameters are identical, with 16 more left out because at least one datasheet does not publish them.

See all 10 differences
How alike are they
6 of 16 comparable
parameters are identical
identical differs not published
01

What actually differs

10 of 16 parameters
Parameter Fronius Symo 17.5-3 480 SUN-18K-G02 Difference
Rated AC power 17.50 kW 18.00 kW 0.50 kW apart
Max efficiency 98.0 % 98.6 % 0.6 pp more efficient
Max AC power 17.50 kW 19.80 kW 2.30 kW apart
Weight 43.4 kg 28.0 kg 15.4 kg lighter
Weight per kW 2.5 kg/kW 1.6 kg/kW 0.9 kg/kW lighter
Max AC current 21.0 A 28.7 A 7.7 A apart
Start voltage 200 V 250 V 50 V earlier start
Max operating temperature 60 °C 65 °C 5 °C more heat tolerant
Ingress protection NEMA 4X IP65 NEMA 4X vs IP65
Dimensions 724x511x226 mm 520x400x240 mm 724x511x226 mm vs 520x400x240 mm
02

Full specification

Parameter Fronius Symo 17.5-3 480 SUN-18K-G02 Difference
AC output
Rated AC power 17.50 kW 18.00 kW 0.50 kW apart
Max AC power 17.50 kW 19.80 kW 2.30 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage - 400 V Not published by Fronius International
Max AC current 21.0 A 28.7 A 7.7 A apart
PV input
Max PV power - 21.60 kW Not published by Fronius International
DC/AC ratio - 1.20 Not published by Fronius International
Max DC voltage 1000 V 1000 V Same
MPPT voltage range - 200-850 V Not published by Fronius International
Start voltage 200 V 250 V -50 V for Fronius Symo 17.5-3 480
MPP trackers - 2 Not published by Fronius International
Strings per tracker - - Neither datasheet publishes this
Max input current per tracker - - Neither datasheet publishes this
Efficiency
European efficiency - 97.8 % Not published by Fronius International
Max efficiency 98.0 % 98.6 % +0.6 pp for SUN-18K-G02
CEC efficiency 97.5 % - Not published by Deye
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 43.4 kg 28.0 kg -15.4 kg for SUN-18K-G02
Weight per kW 2.5 kg/kW 1.6 kg/kW -0.9 kg/kW for SUN-18K-G02
Dimensions 724x511x226 mm 520x400x240 mm 724x511x226 mm vs 520x400x240 mm
Ingress protection NEMA 4X IP65 NEMA 4X vs IP65
Cooling forced-air forced-air Same
Noise - 45 dB Not published by Fronius International
Max operating temperature 60 °C 65 °C +5 °C for SUN-18K-G02
Connectivity and safety
Wi-Fi Yes Yes Same
Ethernet Yes Yes Same
Arc fault protection Yes - Not published by Deye
Integrated DC switch Yes Yes Same
Warranty
Warranty 10 yrs - Not published by Deye
03

More useful comparisons

Open all inverters
Same type, similar size
Fronius International
Fronius Symo 17.5-3 480 vs Fronius Verto 17.5
7 differences, the largest is max efficiency
Same type, similar size
Fronius International
Fronius Symo 17.5-3 480 vs Fronius International Symo Advanced 17.5-3-M
4 differences, the largest is weight
Same type, similar size
SolarEdge
Fronius Symo 17.5-3 480 vs SolarEdge SE17.3KUS
8 differences, the largest is rated ac power
04

Written summary

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