Growatt WIT 18K-HU vs Fronius Verto 17.5 Plus
VS
Fronius International
Fronius Verto 17.5 Plus
17.5 kW
97.5 % euro
Hybrid
The verdict
15 differences, and they point both ways
The largest is rated ac power: 0.50 kW apart. 11 of 26 comparable parameters are identical, with 6 more left out because at least one datasheet does not publish them.
See all 15 differencesHow alike are they
11
of 26 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
15 of 26 parameters
What actually differs
Parameter
WIT 18K-HU
Fronius Verto 17.5 Plus
Difference
Rated AC power
18.00 kW
17.50 kW
0.50 kW apart
European efficiency
97.0 %
97.5 %
0.5 pp more efficient
Max input current per tracker
40.0 A
28.0 A
12.0 A more headroom
Max AC power
18.00 kW
17.50 kW
0.50 kW apart
Max PV power
36.00 kW
26.25 kW
9.75 kW apart
DC/AC ratio
2.00
1.50
0.50 more oversizing headroom
Max charge current
420 A
50 A
370 A faster charging
Weight
55.0 kg
43.0 kg
12.0 kg lighter
Max efficiency
97.6 %
98.1 %
0.5 pp more efficient
Weight per kW
3.1 kg/kW
2.5 kg/kW
0.6 kg/kW lighter
MPP trackers
2
3
1 tracker more
Start voltage
180 V
150 V
30 V earlier start
MPPT voltage range
150-850 V
150-870 V
150-850 V vs 150-870 V
Battery voltage
40-60V
150-700
40-60V vs 150-700
Dimensions
695x475x254 mm
865x574x279 mm
695x475x254 mm vs 865x574x279 mm
02
Full specification
Parameter
WIT 18K-HU
Fronius Verto 17.5 Plus
Difference
AC output
Rated AC power
18.00 kW
17.50 kW
0.50 kW apart
Max AC power
18.00 kW
17.50 kW
0.50 kW apart
Grid connection
3-phase
3-phase
Same
Nominal AC voltage
400 V
400 V
Same
Max AC current
-
26.5 A
Not published by Growatt
PV input
Max PV power
36.00 kW
26.25 kW
9.75 kW apart
DC/AC ratio
2.00
1.50
+0.50 for WIT 18K-HU
Max DC voltage
1000 V
1000 V
Same
MPPT voltage range
150-850 V
150-870 V
150-850 V vs 150-870 V
Start voltage
180 V
150 V
-30 V for Fronius Verto 17.5 Plus
MPP trackers
2
3
+1 trackers for Fronius Verto 17.5 Plus
Strings per tracker
2
2
Same
Max input current per tracker
40.0 A
28.0 A
+12.0 A for WIT 18K-HU
Efficiency
European efficiency
97.0 %
97.5 %
+0.5 pp for Fronius Verto 17.5 Plus
Max efficiency
97.6 %
98.1 %
+0.5 pp for Fronius Verto 17.5 Plus
CEC efficiency
-
-
Neither datasheet publishes this
Battery
Battery input
Yes
Yes
Same
Battery voltage
40-60V
150-700
40-60V vs 150-700
Max charge current
420 A
50 A
+370 A for WIT 18K-HU
Backup power
-
-
Neither datasheet publishes this
Physical
Weight
55.0 kg
43.0 kg
-12.0 kg for Fronius Verto 17.5 Plus
Weight per kW
3.1 kg/kW
2.5 kg/kW
-0.6 kg/kW for Fronius Verto 17.5 Plus
Dimensions
695x475x254 mm
865x574x279 mm
695x475x254 mm vs 865x574x279 mm
Ingress protection
IP66
IP66
Same
Cooling
forced-air
forced-air
Same
Noise
55 dB
57 dB
Effectively the same
Max operating temperature
60 °C
60 °C
Same
Connectivity and safety
Wi-Fi
Yes
Yes
Same
Ethernet
-
Yes
Not published by Growatt
Arc fault protection
-
Yes
Not published by Growatt
Integrated DC switch
Yes
Yes
Same
Warranty
Warranty
-
-
Neither datasheet publishes this
03
Open all inverters
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04
Written summary
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Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate.