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Fronius Verto 17.5 vs SUN-18K-G02 8 of 23 identical Swap Change inverters

Fronius Verto 17.5 vs Deye SUN-18K-G02

Fronius Verto 17.5
Fronius International
Fronius Verto 17.5
17.5 kW 98.3 % euro 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

15 differences, and they point both ways

The largest is rated ac power: 0.50 kW apart. 8 of 23 comparable parameters are identical, with 9 more left out because at least one datasheet does not publish them.

See all 15 differences
How alike are they
8 of 23 comparable
parameters are identical
identical differs not published
01

What actually differs

15 of 23 parameters
Parameter Fronius Verto 17.5 SUN-18K-G02 Difference
Rated AC power 17.50 kW 18.00 kW 0.50 kW apart
European efficiency 98.3 % 97.8 % 0.5 pp more efficient
Max AC power 17.50 kW 19.80 kW 2.30 kW apart
Max PV power 26.25 kW 21.60 kW 4.65 kW apart
DC/AC ratio 1.50 1.20 0.30 more oversizing headroom
MPP trackers 4 2 2 trackers more
Weight 35.2 kg 28.0 kg 7.2 kg lighter
Noise 56 dB 45 dB 12 dB quieter
Weight per kW 2.0 kg/kW 1.6 kg/kW 0.5 kg/kW lighter
Max AC current 26.5 A 28.7 A 2.2 A apart
Start voltage 150 V 250 V 100 V earlier start
Max operating temperature 60 °C 65 °C 5 °C more heat tolerant
Ingress protection IP66 IP65 IP66 vs IP65
MPPT voltage range 150-870 V 200-850 V 150-870 V vs 200-850 V
Dimensions 730x540x278 mm 520x400x240 mm 730x540x278 mm vs 520x400x240 mm
02

Full specification

Parameter Fronius Verto 17.5 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 400 V Same
Max AC current 26.5 A 28.7 A 2.2 A apart
PV input
Max PV power 26.25 kW 21.60 kW 4.65 kW apart
DC/AC ratio 1.50 1.20 +0.30 for Fronius Verto 17.5
Max DC voltage 1000 V 1000 V Same
MPPT voltage range 150-870 V 200-850 V 150-870 V vs 200-850 V
Start voltage 150 V 250 V -100 V for Fronius Verto 17.5
MPP trackers 4 2 +2 trackers for Fronius Verto 17.5
Strings per tracker 2 - Not published by Deye
Max input current per tracker 28.0 A - Not published by Deye
Efficiency
European efficiency 98.3 % 97.8 % +0.5 pp for Fronius Verto 17.5
Max efficiency 98.5 % 98.6 % 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 35.2 kg 28.0 kg -7.2 kg for SUN-18K-G02
Weight per kW 2.0 kg/kW 1.6 kg/kW -0.5 kg/kW for SUN-18K-G02
Dimensions 730x540x278 mm 520x400x240 mm 730x540x278 mm vs 520x400x240 mm
Ingress protection IP66 IP65 IP66 vs IP65
Cooling forced-air forced-air Same
Noise 56 dB 45 dB -12 dB for SUN-18K-G02
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 - - Neither datasheet publishes this
03

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7 differences, the largest is max efficiency
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Fronius Verto 17.5 vs SolarEdge SE17.3KUS
11 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.