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333K-X vs 320K-X 21 of 25 identical Swap Change inverters

Growatt MAX 333K-X vs Growatt MAX 320K-X

Growatt MAX 333K-X
Growatt
MAX 333K-X
333 kW 98.5 % euro Grid-tie
Open inverter page Datasheet PDF
VS
Growatt MAX 320K-X
Growatt
MAX 320K-X
320 kW 98.5 % euro Grid-tie
Open inverter page Datasheet PDF
The verdict

4 differences, none of them an advantage

The largest is rated ac power: 13.00 kW apart. 21 of 25 comparable parameters are identical, with 7 more left out because at least one datasheet does not publish them.

See all 4 differences
How alike are they
21 of 25 comparable
parameters are identical
identical differs not published
01

What actually differs

4 of 25 parameters
Parameter 333K-X 320K-X Difference
Rated AC power 333.00 kW 320.00 kW 13.00 kW apart
Max AC power 366.30 kW 352.00 kW 14.30 kW apart
Max PV power 499.50 kW 480.00 kW 19.50 kW apart
Max AC current 240.3 A 230.9 A 9.4 A apart
02

Full specification

Parameter 333K-X 320K-X Difference
AC output
Rated AC power 333.00 kW 320.00 kW 13.00 kW apart
Max AC power 366.30 kW 352.00 kW 14.30 kW apart
Grid connection 3-phase 3-phase Same
Nominal AC voltage 800 V 800 V Same
Max AC current 240.3 A 230.9 A 9.4 A apart
PV input
Max PV power 499.50 kW 480.00 kW 19.50 kW apart
DC/AC ratio 1.50 1.50 Same
Max DC voltage 1500 V 1500 V Same
MPPT voltage range 500-1500 V 500-1500 V Same
Start voltage 500 V 500 V Same
MPP trackers 6 6 Same
Strings per tracker 5 5 Same
Max input current per tracker 80.0 A 80.0 A Same
Efficiency
European efficiency 98.5 % 98.5 % Same
Max efficiency 99.0 % 99.0 % 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 126.0 kg 126.0 kg Same
Weight per kW 0.4 kg/kW 0.4 kg/kW Same
Dimensions 790x1145x371 mm 790x1145x371 mm Same
Ingress protection IP66 IP66 Same
Cooling forced-air forced-air Same
Noise - - Neither datasheet publishes this
Max operating temperature 60 °C 60 °C Same
Connectivity and safety
Wi-Fi Yes Yes Same
Ethernet - - Neither datasheet publishes this
Arc fault protection Yes Yes Same
Integrated DC switch Yes Yes Same
Warranty
Warranty 5 yrs 5 yrs Same
03

More useful comparisons

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Sofar Solar
Growatt MAX 333K-X vs SOFAR 330KTLX0
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Sungrow
Growatt MAX 320K-X vs Sungrow SG320HX
7 differences, the largest is mpp trackers
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Growatt MAX 320K-X vs Sungrow SG350HX-US
8 differences, the largest is mpp trackers
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GoodWe
Growatt MAX 320K-X vs GoodWe GW320K-UT
7 differences, the largest is mpp trackers
04

Written summary

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