The assessment
How it scores, by category
Market position
The data
Hybrid inverter
Manages PV, battery DC and household AC through the inverter platform.
- Product role
- The battery remains a separate product even when it belongs to the same branded platform.
- Published range
- 4.999–9.999 kW
- Phase
- Single phase
- Backup boundary
- Whole-home capability recorded
Warranty coverage: 15-year term
Coverage includes
Parts only · term longer than 88 of 95 scored inverters
No inverter in the fleet publishes a year-by-year performance or output guarantee the way panels and batteries do - this shows the covered term against the market-typical term and where every scored inverter’s term lands (grey dots, sized by model count), plus what the warranty actually includes.
Verification & sources
Market context
Global evidencechange in the site menu
Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.
Benchmark anchor. The highest rated output is scored; battery-capacity suffixes do not alter the inverter benchmark. Scored model: EK90 HS5-10K-S4-X · checked 2026-08-26. Evidence.
Sources & references · checked 2026-10-03
Strong evidence coverage
21 of 21 scored criteria link directly to a published source.
Values marked estimated, derived, or not found remain visible on the audit sheet and do not carry the same evidential weight as a linked source. Coverage measures direct links, not an independent guarantee that a claim is correct.
Record correction. Corrected 2026-09-30: the record's warranty text was read from an older copy of SAJ's EK90 HS5 Australian limited warranty (sha256 ae292a09, no version line), which states 60% SOH and, in one clause, a ten year term. SAJ's Australian warranty page linked Version 1.0 dated 8 August 2026 (sha256 5c8ec0fd) on 2026-09-30; it states 70% SOH and 15 years, and the record now follows it. The 15-year term is unchanged and no inverter score moves. The older copy is kept on record as superseded. SAJ EK90 HS5 Single-Phase S3 / S4 Australian datasheet, exact manual, EK90 HS5 Australian warranty and CER exports checked 2026-08-26
- Sourced valuesData card →
- Archived copy of the primary sourcePDF ↗
Show 3 more
- Monitoring & smart featuresManufacturer ↗
- Grid & safety certificationManufacturer ↗
- Manufacturing track recordManufacturer ↗
Help strengthen this record
These are published evidence gaps, not private submissions. A source is reviewed under the same methodology whether it comes from a reader, installer or manufacturer.
- Semiconductor technologyNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or independent source is requested.Offer a source
- Open protocol & API maturityNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or independent source is requested.Offer a source
- Firmware & security disclosureNot stated in reviewed documentsThe public documents reviewed for this record do not state this value. A published or independent source is requested.Offer a source
Product record history
4 changes to this record · 2 products changed in this update
Grid & safety certification: Evidence status
- Before
- reviewed_absence
- After
- sourced
Grid & safety certification
- Before
- IEC 62109 only
- After
- IEC 62109 + grid code, 1 market
3 changes to this record · 4 products changed in this update
AU Certifications
- Current text
- The 24 September 2026 CER inverter export lists EK90 HS5-10K-S4 (AS4777-2 2020), approved 11 September 2026 and expiring 12 February 2028; this record's scored system, EK90 HS5-10K-S4-X, is that inverter with a battery-capacity suffix. The same export also lists EK90 HS5-5K-S3 (AS4777-2 2020) and EK90 HS5-8K-S3 (AS4777-2 2020), which are not this record's scored model. S3 and S4 remain distinct identities in this record. The 24 September 2026 CER battery export also lists EK90 BU5-7.0-TV and EK90 BU5-9.0-TV, approved 11 September 2026 and expiring 12 February 2028; the identity recorded for this record is the inverter row only.; The exact Australian datasheet lists IEC 62109-1/-2, IEC 62040, IEC 62477, IEC 62619, AS 4777.2 and SA TS 5398 as standards.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Open protocol & API maturityAU market evidence+5 in JSON recordAU Grid and installation context
- Current text
- SAJ publishes an Australian single-phase technical package and AS 4777.2 among its standards. The 24 September 2026 CER inverter export lists this system's inverter, EK90 HS5-10K-S4 (AS4777-2 2020). Grid connection, rebate eligibility and DNSP acceptance are not reviewed for this record.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Open protocol & API maturityAU market evidence+5 in JSON recordAU Support Note
- Current text
- This is a current manufacturer-documented Australian launch, not an approval claim. It remains outside the AU buyer-ready gate because availability, support and buyer readiness are not reviewed. The S3/S4 split is retained: 5 kW and 8 kW are S3, while the 9.999 kW model is S4. Those suffixes are not treated as aliases.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Open protocol & API maturityAU market evidence+5 in JSON record
6 changes to this record · 4 products changed in this update
AU Warranty scope
- Current text
- Australia; the governing EK90 HS5 warranty, Version 1.0 dated 8 August 2026, states a 15-year BESS term from the earlier of installation or six months after SAJ shipment. It separately guarantees the battery to 70% SOH or 4.4 MWh throughput per kWh usable, whichever occurs first.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Open protocol & API maturityAU market evidence+6 in JSON recordFirmware & security disclosure: Evidence sources
- Before
- https://au.saj-electric.com/hubfs/Australia/AU%20Service%20and%20Support/AU%20Download%20Center/AU%20Warranty/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf; https://www.saj-electric.com/hubfs/Guides%20and%20Manuals/HS5/HS5-S/EK90_HS5-%285K-10K%29-%28S3_S4%29-X_User_Manual_V0_en.pdf
- After
- https://au.saj-electric.com/hubfs/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf; https://www.saj-electric.com/hubfs/Guides%20and%20Manuals/HS5/HS5-S/EK90_HS5-%285K-10K%29-%28S3_S4%29-X_User_Manual_V0_en.pdf
Source revision
- Before
- SAJ EK90 HS5 Single-Phase S3 / S4 Australian datasheet, exact manual, EK90 HS5 Australian warranty and CER exports checked 2026-08-26
- After
- Corrected 2026-09-30: the record's warranty text was read from an older copy of SAJ's EK90 HS5 Australian limited warranty (sha256 ae292a09, no version line), which states 60% SOH and, in one clause, a ten year term. SAJ's Australian warranty page linked Version 1.0 dated 8 August 2026 (sha256 5c8ec0fd) on 2026-09-30; it states 70% SOH and 15 years, and the record now follows it. The 15-year term is unchanged and no inverter score moves. The older copy is kept on record as superseded. SAJ EK90 HS5 Single-Phase S3 / S4 Australian datasheet, exact manual, EK90 HS5 Australian warranty and CER exports checked 2026-08-26
AU Evidence sources
- Before
- https://au.saj-electric.com/en-au/services-support-download; https://au.saj-electric.com/hubfs/Australia/AU%20Service%20and%20Support/AU%20Download%20Center/AU%20Warranty/EK90-HS5%285-10K%29_S3%2C%20S4_Datasheet_en_AU.pdf; https://au.saj-electric.com/hubfs/Australia/AU%20Service%20and%20Support/AU%20Download%20Center/AU%20Warranty/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf; https://cer.gov.au/document/cec-approved-inverters; https://cer.gov.au/document/cec-approved-solar-batteries-0; https://www.saj-electric.com/home-energy-storage-system-hs5-series; https://www.saj-electric.com/hubfs/Guides%20and%20Manuals/HS5/HS5-S/EK90_HS5-%285K-10K%29-%28S3_S4%29-X_User_Manual_V0_en.pdf
- After
- https://au.saj-electric.com/en-au/services-support-download; https://au.saj-electric.com/hubfs/Australia/AU%20Service%20and%20Support/AU%20Download%20Center/AU%20Warranty/EK90-HS5%285-10K%29_S3%2C%20S4_Datasheet_en_AU.pdf; https://au.saj-electric.com/hubfs/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf; https://cer.gov.au/document/cec-approved-inverters; https://cer.gov.au/document/cec-approved-solar-batteries-0; https://www.saj-electric.com/home-energy-storage-system-hs5-series; https://www.saj-electric.com/hubfs/Guides%20and%20Manuals/HS5/HS5-S/EK90_HS5-%285K-10K%29-%28S3_S4%29-X_User_Manual_V0_en.pdf
Warranty assurance: Evidence sources
- Before
- https://au.saj-electric.com/hubfs/Australia/AU%20Service%20and%20Support/AU%20Download%20Center/AU%20Warranty/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf
- After
- https://au.saj-electric.com/hubfs/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf
Warranty period (yrs): Evidence sources
- Before
- https://au.saj-electric.com/hubfs/Australia/AU%20Service%20and%20Support/AU%20Download%20Center/AU%20Warranty/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf
- After
- https://au.saj-electric.com/hubfs/SAJ%20Limited%20Warranty%20for%20residential%20EK90%20HS5%20%20system%20%28AU%29.pdf
2 changes to this record · 2 products changed in this update
Certification: EK90 HS5-10K-S4 (AS4777-2 2020)
- Before
- Not previously recorded
- After
- accepted at: 2026-09-30; category: inverter; certification model: EK90 HS5-10K-S4 (AS4777-2 2020); jurisdiction: au_cec; match method: exact_normalized_single_record; product slug: saj-ek90-hs5-s3-s4-5-9-999-au; source key: data/inverters/saj_ek90_hs5_s3_s4_au.json; source manufacturer name: Guangzhou Sanjing Electric Co Ltd; validation: approved at: 2026-09-11; candidate model: EK90 HS5-10K-S4 (AS4777-2 2020); data confidence: High; evidence url: https://cer.gov.au/document/cec-approved-inverters-0; expires at: 2028-02-12; list data version: au-cer-inverter-2026-09-24-30834dd009e1; list retrieved at: 2026-09-29T01:10:46Z; listing status at validation: listed
Certification model
- Before
- Not previously recorded
- After
- EK90 HS5-10K-S4 (AS4777-2 2020)
1 change to this record · 4 products changed in this update
Product record
kind: inverter; brand: SAJ; name: EK90 HS5 S3 / S4; model: EK90 HS5-5K-S3, EK90 HS5-8K-S3 and EK90 HS5-10K-S4, each with 14-54 kWh suffixes; scored model EK90 HS5-10K-S4-X; score: 75.4
Primary datasheet
This is review.solar's publication history. It does not claim the product changed on the recorded date, and it excludes compatibility, system pairing, installation suitability and relative leaderboard prose. Open the complete JSON record.
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- Australian certification source identity verified
- AU market evidence checked
- Series benchmark evidence checked
Scored by Solar Analytica Research
Further reading from Findings
- What changed in the benchmark in August 2026. · 7 min read
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.
Our reading
EK90 HS5 S3 / S4 scores 76, placing 8 of 63 in the Inverter class against a class average of 70.3. Its strongest scoring dimension is design & flexibility (96), running 15.6 points above the class average on this dimension. Energy Ecosystem (45) is the dimension with the most room to move. Key specifications: 98.0% peak efficiency, 4 MPPT inputs, 15-year warranty.
Dietreich Farquharson · review.solar