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WIT 28K-A-US L2 / WIT 28K-AU-US L2 vs WT 28K-H-US L2 / WT 28K-HU-US L2 6 of 12 identical Swap Change inverters

Growatt WIT 28K-A-US L2 / WIT 28K-AU-US L2 vs Growatt WT 28K-H-US L2 / WT 28K-HU-US L2

Growatt WIT 28K-A-US L2 / WIT 28K-AU-US L2
Growatt
WIT 28K-A-US L2 / WIT 28K-AU-US L2
28 kW Hybrid
Open inverter page Datasheet PDF
VS
Growatt WT 28K-H-US L2 / WT 28K-HU-US L2
Growatt
WT 28K-H-US L2 / WT 28K-HU-US L2
28 kW Hybrid
Open inverter page Datasheet PDF
The verdict

WIT 28K-A-US L2 / WIT 28K-AU-US L2 leads on the differences that matter

The largest is max ac power: 2.80 kW apart. 6 of 12 comparable parameters are identical, with 20 more left out because at least one datasheet does not publish them.

See all 6 differences
How alike are they
6 of 12 comparable
parameters are identical
identical differs not published
01

What actually differs

6 of 12 parameters
Parameter WIT 28K-A-US L2 / WIT 28K-AU-US L2 WT 28K-H-US L2 / WT 28K-HU-US L2 Difference
Max AC power 30.80 kW 28.00 kW 2.80 kW apart
Weight 120.0 kg 133.0 kg 13.0 kg lighter
Weight per kW 4.3 kg/kW 4.8 kg/kW 0.5 kg/kW lighter
Ingress protection IP66/NEMA 4X IP66 IP66/NEMA 4X vs IP66
Battery voltage 380~450V 380-650V 380~450V vs 380-650V
Dimensions 820x1350x501 mm 1350x820x501 mm 820x1350x501 mm vs 1350x820x501 mm
02

Full specification

Parameter WIT 28K-A-US L2 / WIT 28K-AU-US L2 WT 28K-H-US L2 / WT 28K-HU-US L2 Difference
AC output
Rated AC power 28.00 kW 28.00 kW Same
Max AC power 30.80 kW 28.00 kW 2.80 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage - 208 V Not published by Growatt
Max AC current 85.6 A 85.6 A Same
PV input
Max PV power - 54.00 kW Not published by Growatt
DC/AC ratio - 1.93 Not published by Growatt
Max DC voltage - 800 V Not published by Growatt
MPPT voltage range - 180-600 V Not published by Growatt
Start voltage - 195 V Not published by Growatt
MPP trackers - 2 Not published by Growatt
Strings per tracker - - Neither datasheet publishes this
Max input current per tracker - 32.0 A Not published by Growatt
Efficiency
European efficiency - - Neither datasheet publishes this
Max efficiency 98.0 % 98.0 % Same
CEC efficiency - - Neither datasheet publishes this
Battery
Battery input Yes Yes Same
Battery voltage 380~450V 380-650V 380~450V vs 380-650V
Max charge current - - Neither datasheet publishes this
Backup power - - Neither datasheet publishes this
Physical
Weight 120.0 kg 133.0 kg -13.0 kg for WIT 28K-A-US L2 / WIT 28K-AU-US L2
Weight per kW 4.3 kg/kW 4.8 kg/kW -0.5 kg/kW for WIT 28K-A-US L2 / WIT 28K-AU-US L2
Dimensions 820x1350x501 mm 1350x820x501 mm 820x1350x501 mm vs 1350x820x501 mm
Ingress protection IP66/NEMA 4X IP66 IP66/NEMA 4X vs IP66
Cooling - forced-air Not published by Growatt
Noise - - Neither datasheet publishes this
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi - - Neither datasheet publishes this
Ethernet - - Neither datasheet publishes this
Arc fault protection - - Neither datasheet publishes this
Integrated DC switch - - Neither datasheet publishes this
Warranty
Warranty - - Neither datasheet publishes this
03

More useful comparisons

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Same type, similar size
Growatt
Growatt WIT 28K-A-US L2 / WIT 28K-AU-US L2 vs Growatt MID 29.9K-HU
9 differences, the largest is rated ac power
Same type, similar size
Deye
Growatt WIT 28K-A-US L2 / WIT 28K-AU-US L2 vs Deye SUN-29.9K-SG01HP3-EU-BM3
9 differences, the largest is rated ac power
Same type, similar size
Growatt
Growatt WIT 28K-A-US L2 / WIT 28K-AU-US L2 vs Growatt WIT 29.9K-XHU
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.