Growatt
Products
Batteries
Basic specs19.8 kWhValue needs confirmation: The manual prints two energy figures for this model.Discharge14.3 ACharge14.3 A$ / rated kWhUnavailableWarranty10 yearsSee termsLifetime productionNot publishedSize482.56 L*W: 1,300 × H: 1,160 × D: 320 mm270 kg595.25 lb0.04 kWh/L*CertificatesCEC · UL 1973CEC listed · UL scope in details
History and sources
Certificate & document history
Certificate & document history
CSIP: claimed
Growatt WIT 40K-AU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-AU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-AU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentSA17-SA18: claimed
Growatt WIT 40K-AU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-AU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-AU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentUL1998:2018: claimed
Growatt WIT 40K-AU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-AU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-AU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentCEC (printed by the maker; issuer not named): claimed
Growatt WIT 40K-AU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-AU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-AU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass. The maker prints only the letters "CEC" and names no issuer or program; it is not a California Energy Commission equipment list entry (those rows cite the CEC list itself).
Official datasheet: Growatt datasheet Checked · Earlier documentFCC Part 15: claimed
Growatt WIT 40K-AU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-AU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-AU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentCSA C22.2.107.1: claimed
Growatt WIT 40K-AU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-AU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-AU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentUL1741:2021: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentUL1741 SA/SB:2020: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentIEEE1547:2018: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentIEEE1547.1:2020: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentHECO Rule14: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentE-5000: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentCSIP: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentSA17-SA18: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentUL1998:2018: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentCEC (printed by the maker; issuer not named): claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass. The maker prints only the letters "CEC" and names no issuer or program; it is not a California Energy Commission equipment list entry (those rows cite the CEC list itself).
Official datasheet: Growatt datasheet Checked · Earlier documentFCC Part 15: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentCSA C22.2.107.1: claimed
Growatt WIT 40K-H-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-H-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-H-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentUL1741:2021: claimed
Growatt WIT 40K-HU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-HU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-HU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentUL1741 SA/SB:2020: claimed
Growatt WIT 40K-HU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-HU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-HU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentIEEE1547:2018: claimed
Growatt WIT 40K-HU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-HU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-HU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentIEEE1547.1:2020: claimed
Growatt WIT 40K-HU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-HU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-HU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentHECO Rule14: claimed
Growatt WIT 40K-HU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-HU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-HU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentE-5000: claimed
Growatt WIT 40K-HU-USProduct / system scope unresolved. Growatt prints "UL1741:2021, UL1741 SA/SB:2020, IEEE1547:2018, IEEE1547.1:2020, HECO Rule14, E-5000, CSIP, SA17-SA18, UL1998:2018, CEC, FCC Part 15, CSA C22.2.107.1" in the Growatt WIT 28-55K-HU-US L2 datasheet (EN 202405, marked Preliminary Version), which names WIT 40K-HU-US L2, captured on September 25, 2026. This records the standard as Growatt prints it. It is a manufacturer statement only: no issuer listing, certificate number, edition, scope or validity was checked in this pass.
Official datasheet: Growatt datasheet Checked · Earlier documentManufacturer history
Manufacturer history
No manufacturer history recorded yet.
Manufacturer & sources
Manufacturer & sources
This manufacturer is listed as Growatt. Manufacturing entities, factories, cell origin and model-specific ownership relationships have not been audited.
Product certificates and company management certificates are tracked separately. No company management certificates have been reviewed for this manufacturer yet.
Recalls / legal notices
No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice
Owner reviews
I built this system for my Pool equipment and BBQ plugs. Its a small 4kw system that has a battery. Have an electric hot tub that the battery keeps running over night. It pretty much covers the equipment use year round. Since rate the store is currently not working when the store is not listed. I did purchase the inverter from Portable Sun LLC
andyps Verified owner · Oct 16, 2026
Full review / responsesWe purchased this power station to act as a temporary power situation for our RV travels around-the-world. We chose this one because of the Prime day sale and because it was the cheapest option that included a TT-30 port. It has been extremely handy for us and with all of our devices plugged in it lasts a REALLY long time. We are also able to charge it up extremely quickly with our gas / propane generator (in a matter of 30 minutes or so from 40% to full). I would definitely recommend it (so far) to anyone and everyone looking for a powerful, but cheaper and lighter weight power station.
oberning Verified owner · Oct 14, 2026
Full review / responsesReview policy · Verified reviews carry 19× the weight. Responses and helpful votes do not change stars.
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