Growatt utility-scale PV string-inverter review
Growatt MAX 320K-X, 333K-X and 350K-X Utility Inverters
MAX 320K-X, MAX 333K-X and MAX 350K-X The verified source tables show 1500 V maximum, 500-1500 V MPPT, six trackers, five strings per tracker, 80 A operating and 100 A short-circuit current per tracker On the AC side, 800 V nominal with 320/333/352 kW rated output and member-specific apparent-power derating at 25/30/45/50 degrees Celsius 99.03% maximum Select one complete model, voltage route and destination document set before quotation; family maxima, optional protection and certificate lists do not apply automatically to every member.
Current source identity: official Growatt January 2026 MAX 320-350K-X datasheet set. The 320, 333 and 350 labels have different rated/apparent-power and temperature-derating rows. Array current, AC block and transformer sizing must use the selected column.
Downloads
Current document status
Before quotation, obtain the exact full model and suffix, current datasheet and manual, destination certificate/model schedule, approved grid profile, PV string schedule, AC collection and protection design, AFCI/PID/SPD option status, connector and monitoring hardware, firmware, warranty, packing and written substitution rules.
Current family evidence
Preserve the member, DC-input and AC-voltage boundaries
The official tables define a family, not one interchangeable column.
Released model columns
MAX 320K-X, MAX 333K-X and MAX 350K-X
PV and MPPT architecture
1500 V maximum, 500-1500 V MPPT, six trackers, five strings per tracker, 80 A operating and 100 A short-circuit current per tracker
AC interconnection route
800 V nominal with 320/333/352 kW rated output and member-specific apparent-power derating at 25/30/45/50 degrees Celsius
Protection and physical record
Type II DC/AC surge and string-fault monitoring are listed; anti-PID is optional and the external plant-protection package remains project scope. IP66; 139 kg; altitude rating to 5000 m with derating above 4000 m
utility-scale PV inverter RFQ inputs
Six checks before fixing the inverter member and BOM
Array, AC collection, options and destination evidence must map to the same released model.
Full model and destination
State the complete model/suffix, quantity, country, utility, service voltage/frequency, export or PPC rule and required grid-code, safety and EMC evidence.
PV string and MPPT schedule
Provide module Voc/Vmp/Isc/Imp, temperature coefficients, strings per tracker and orientation; verify cold Voc, operating voltage, tracker current, short-circuit allowance and connector/cable ratings.
AC collection and grid
Define inverter AC voltage, conductor/busbar, breaker or switchgear, transformer where applicable, grounding, fault level, voltage drop, reactive-power duty and point-of-connection limit.
Protection and ordering options
Freeze DC switch, SPD, AFCI, anti-PID, night SVG or other options by exact ordering code. A source row marked optional or variant-specific is not standard equipment for every member.
Monitoring and plant control
Confirm RS485/USB, Wi-Fi/LAN/4G/RF/PLC hardware, logger or ShineMaster/SEM route, meter/PPC/export control, communications-loss behavior, firmware and account ownership.
Documents and commercial control
Request current datasheet/manual, certificate model list, SLD and settings, warranty, packing, serial traceability, accessories, lead time and written approval for any substitution.
Family, option and performance boundaries
Do not move family maxima or certificate coverage between columns
The exact member, voltage route, firmware, array and destination documents remain controlling.
Variant tables remain separate
The 320, 333 and 350 labels have different rated/apparent-power and temperature-derating rows. Array current, AC block and transformer sizing must use the selected column.
Maximum efficiency is not yield
99.03% maximum This is a datasheet maximum, not an annual-energy or every-operating-point guarantee; model, loading, temperature, clipping, wiring and availability affect yield.
Optional protection needs an order code
Type II DC/AC surge and string-fault monitoring are listed; anti-PID is optional and the external plant-protection package remains project scope. Confirm factory option, external devices, settings, applicable manual and destination design instead of relying on a family headline.
Certificates do not transfer automatically
A downloads list may span members, suffixes and countries. Require the ordered full model on the current certificate schedule and use the destination grid settings and commissioning record.
Continue the utility-scale PV review
Connect the exact inverter to the project design and controlled BOM
Use the solution and BOM guides to coordinate electrical interfaces, documents and responsibility boundaries.
Utility solar procurement solution
Coordinate array, inverter, AC collection, protection, controls, interconnection, site and acceptance responsibilities.
Review project scope →Solar BOM review guide
Freeze model, strings, voltage route, options, accessories, certificates, quantities and exclusions before comparing prices.
Build the inverter BOM →Growatt MAX 320K-X, 333K-X and 350K-X Utility Inverters FAQ
Questions to close before releasing the inverter order
One exact member and one matching evidence set should support the quotation.
Which model columns are covered by the verified source?
MAX 320K-X, MAX 333K-X and MAX 350K-X
Can one PV string design be used across the whole family?
No. 1500 V maximum, 500-1500 V MPPT, six trackers, five strings per tracker, 80 A operating and 100 A short-circuit current per tracker Check the exact member's tracker/string allocation, voltage and current against the selected module and site temperature.
Are AFCI, PID and other protection functions standard on every member?
Do not assume that. Type II DC/AC surge and string-fault monitoring are listed; anti-PID is optional and the external plant-protection package remains project scope. Confirm the complete ordering code, external protection design, manual and destination requirements.
What should the RFQ freeze?
Freeze full model/suffix, PV strings, AC voltage and collection, transformer/grid interface, protection/options, monitoring/PPC, certificate set, firmware, warranty, accessories and quantity.
Prepare an exact Growatt MAX 320K-X, 333K-X and 350K-X Utility Inverters RFQ
Send the full member and suffix, module/string schedule, AC and grid design, protection/options, monitoring/control, destination documents, accessories and quantity.
Start with the product, application or project information you have. We can help identify the remaining configuration, document or delivery questions before a final quotation.
Verify the Inverter Configuration
