The assessment
How it scores, by category
Market position
The data
DC-coupled battery
Stores DC energy and relies on system power electronics outside the battery product for household AC.
- Product role
- The published battery record covers the storage stack, controller and stated capacity range.
- Published range
- 9.1–59.8 kWh
- Phase
- Not recorded
- Backup boundary
- Installation-specific
What the documents establish
Published evidence, source-reviewed non-disclosure and unresolved questions remain separate from the product score.
Usable capacity
Stated depth of discharge: 100%. Published usable energy: 9.1 kWh in the scored configuration. These values may have different measurement conditions.9.1 kWh usableScored configuration: T-HS10.2 (2 x TB-HS51 or TB-HS51O modules). Published range 9.1–59.8 kWh.
The stated depth of discharge and published usable energy can have different test conditions or configuration limits. They do not by themselves establish nominal capacity or a reserve that is always inaccessible. Delivered AC energy and runtime also depend on the inverter, settings and loads.
Same T-HS10.2 two-module reference retained:10.2kWh nominal,9.1kWh published usable at90%DoD/0.2C/+25C. AUusable family9.1–59.8kWh;nominal10.2–66.5kWh remains descriptive. Configurable maximum100%DoD is inverter/system dependent;no ACenergy/runtime orothermarket equivalence inferred.
Usable capacity sourceDepth-of-discharge sourceCapacity guarantee: minimum retained at year 10
No year-by-year capacity schedule is published for this product - the manufacturer guarantees only this end-of-term minimum, not a specific decline curve. Capacity figure based on the sourced usable capacity of the base configuration; modular systems scale with additional modules.
Blackout protection
71 / 100#22 of 90 batteriesWhole-home (via hybrid inverter)
The blackout score is a standalone benchmark of outage resilience only - it re-weights sourced specs already scored in this product’s pillars (backup tier, switchover, surge strength, backup power, off-grid recharge) and never affects the overall score. Dots show the full battery fleet; the marker is this product.
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. Same T-HS10.2 two-module reference retained:10.2kWh nominal,9.1kWh published usable at90%DoD/0.2C/+25C. AUusable family9.1–59.8kWh;nominal10.2–66.5kWh remains descriptive. Configurable maximum100%DoD is inverter/system dependent;no ACenergy/runtime orothermarket equivalence inferred. Scored model: T-HS10.2 (2 x TB-HS51 or TB-HS51O modules) · checked 2026-10-05. Evidence.
Sources & references · checked 2026-08-31
Strong evidence coverage
31 of 31 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.
How far the evidence reaches
- OutputManufacturer claim4 rows in the rings4 design facts beside the rings
- EnduranceManufacturer claim2 rows in the rings4 warranty terms and 1 design fact beside the rings
- SafetyCertified or regulator-listed1 of 5 rows in the rings beyond claim1 design fact beside the rings
- BackingManufacturer claim1 row in the rings1 warranty term beside the rings
- FitManufacturer claim1 row in the rings7 design facts beside the rings
- FootprintNot assessed for batteries
Rings, outside in: manufacturer claim, certified or regulator-listed, third-party source. The centre is review.solar's own measurement, empty for every product today. Warranty terms and design facts that rest on the maker's own word are counted beside the rings; a reviewed absence, or one that reaches beyond the maker's claim, stays in them. How the evidence puzzle works
Record revision. SolaX Australia TSYS-HS51 V1.9 datasheet and Australian warranty V1.6 reviewed 2026-08-06. First-market DE overlay review 2026-08-31: official German catalogues recorded for the remaining 17 AU+US identities; Australian and United States overlays and scores unchanged. Australian V1.92 (650.00071.00.EN-AU) energy/test basis reconciled 2026-10-05: 9.1 kWh usable at 90% DoD versus 10.2 kWh nominal for the unchanged two-module reference; maximum 100% DoD is configurable and system-dependent. Warranty and regional approval review dates unchanged. Partial connection-boundary review 2026-10-05: exact HS51 Version5.0 manual documents passive DC connector safeguards; not transferred to AC-terminal or active NTC criterion. Scores and other product/market/full-review evidence unchanged.
- Sourced valuesData card →
- Warranty summary10-year product warranty →
Show 6 more
- Safety certificationManufacturer ↗
- Manufacturing track recordManufacturer ↗
- VPP & grid services readinessManufacturer ↗
- EV charging integrationManufacturer ↗
- Smart home & IoT depthManufacturer ↗
- Firmware & security disclosureManufacturer ↗
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.
- Verified reliabilityNot 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
- AC terminal & connection protectionNot 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
- Cell provenance & traceabilityNot 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
2 earlier entries recorded source rechecks rather than changes to the published figures, and are not listed here. Every entry remains in the evidence record.
1 change to this record · 43 products changed in this update
Safety certification: Evidence sources
- Before
- https://au.solaxpower.com/products/tsys-hs51.html; https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
- After
- https://au.solaxpower.com/products/tsys-hs51.html; https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf; https://cer.gov.au/document/cec-approved-solar-batteries-0
3 changes to this record · 8 products changed in this update
US Support Note
- Current text
- SolaX's United States product catalogue lists T-BAT-SYS-HV-5.0 as its residential battery and has no TSYS-HS51 or T-HS entry. T-BAT-SYS-HV-5.0 is built from the TP-HS50 module with the TBMS-MCS60060 battery management system. The two are not interchangeable: the United States module is 5.0 kWh against 5.1 kWh here, the United States system stops at four modules and 20 kWh in a stack against thirteen modules and 66.5 kWh, and the United States range has no optimiser module answering to this record's TB-HS51O. Certification differs accordingly, UL 1973, UL 9540 and UL 9540A in the United States against the IEC 62619 and IEC 62040 series here, which resolves this record's outstanding UL 9540A question for the United States part only and not for the part scored here. The United States and Canada limited warranty hosted on us.solaxpower.com (printed V1.6, valid from 15 January 2025) is given by SolaX Power Network Technology (Zhejiang) Co., Ltd., lists a Santa Clara, California contact address, allows transfer to subsequent owners of the system (clause 1.5), is governed by the laws of the People's Republic of China, and refers disputes to arbitration at the Shanghai International Arbitration Center. Its battery table names only T-BAT-SYS-HV-5.0 with TP-HS50. The warranty web page on the same site also lists T-BAT-SYS-HV-S51 with TB-HS51 among many battery series; a warranty-table entry does not establish United States sale, and the California Energy Commission battery list shows SolaX T-BAT H 10.0, 15.0 and 20.0 only. A superseded 2023 warranty had named a United States entity, SolaX Power USA LLC of Torrance, California. The United States channel is a static four-name distributor list rather than a searchable locator.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
US market evidenceUS market evidence+4 in JSON recordAU Certifications
- Before
- IEC 62619; IEC 62620; RCM; UN 38.3
- After
- CEC approved battery list: series TSYS-HS51, T-HS10.2 through T-HS66.5, approved 26 August 2025, expiry 31 December 2027 (CER export of 24 September 2026); IEC 62619; IEC 62620; RCM; UN 38.3
US Evidence sources
- Before
- https://d3gmvp5nwny4u2.cloudfront.net/assets/warranty/warranty-terms-and-conditions-us-and-canada-english-20240723.pdf; https://solarequipment.energy.ca.gov/Home/PropertyDetails/BatteryList; https://us.solaxpower.com/uploads/file/320101034410-t-bat-sys-hv-5.0-user-manual-240621-en.pdf; https://www.solaxpower.com/uploads/file/a1-ess-g2-datasheet-en.pdf
- After
- https://d3gmvp5nwny4u2.cloudfront.net/assets/warranty/warranty-terms-and-conditions-us-and-canada-english-20240723.pdf; https://solarequipment.energy.ca.gov/Home/PropertyDetails/BatteryList; https://us.solaxpower.com/uploads/file/2025-warranty-terms-conditions-canada-america-en.pdf; https://us.solaxpower.com/uploads/file/320101034410-t-bat-sys-hv-5.0-user-manual-240621-en.pdf; https://us.solaxpower.com/warranty.html; https://www.solaxpower.com/uploads/file/a1-ess-g2-datasheet-en.pdf
4 changes to this record · 1 product changed in this update
AC terminal & connection protection: Evidence sources
- Before
- https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
- After
- https://www.solaxpower.com/uploads/file/tsys-hs51-user-manual-en.pdf
Evidence sources
- Before
- https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
- After
- https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf; https://www.solaxpower.com/uploads/file/tsys-hs51-user-manual-en.pdf
Summary
- Current text
- T-HS10.2 remains the two-module scored reference: 10.2 kWh nominal, with 9.1 kWh published usable energy at 90% DoD, 0.2C charge/discharge and +25°C. The Australian sheet lists a 9.1–59.8 kWh usable family range, separate from 10.2–66.5 kWh nominal. A maximum of 100% DoD is settable, but available DoD depends on the compatible inverter and system configuration; this does not replace the stated usable-energy test. AC-delivered energy and backup runtime also depend on inverter losses, reserves and loads. The >6000-cycle maker statement uses 90% DoD, 25±2°C, 0.5C and 70% end of life. Cell-maker identity remains unresolved; the CB56 sample evidence applies to standard TB-HS51 and is not transferred to optimiser TB-HS51O. The HS51 is a high-voltage DC battery, with BAT+ and BAT− power connections to an external inverter. Manual Version5.0 section2.2.2 and section6.2 document locking DC connectors, rubber-sealed cable entry and a screwed cable guard cover. These are passive DC connection safeguards, not evidence of AC-terminal protection or active terminal NTC monitoring with automatic power reduction. The separate inverter owns the AC connection; its safety features are not transferred to this battery. The current AC criterion remains unresolved under the unchanged rubric; this does not establish that the battery lacks ordinary DC connector protection.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheetSource revision
- Current text
- SolaX Australia TSYS-HS51 V1.9 datasheet and Australian warranty V1.6 reviewed 2026-08-06. First-market DE overlay review 2026-08-31: official German catalogues recorded for the remaining 17 AU+US identities; Australian and United States overlays and scores unchanged. Australian V1.92 (650.00071.00.EN-AU) energy/test basis reconciled 2026-10-05: 9.1 kWh usable at 90% DoD versus 10.2 kWh nominal for the unchanged two-module reference; maximum 100% DoD is configurable and system-dependent. Warranty and regional approval review dates unchanged. Partial connection-boundary review 2026-10-05: exact HS51 Version5.0 manual documents passive DC connector safeguards; not transferred to AC-terminal or active NTC criterion. Scores and other product/market/full-review evidence unchanged.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
15 changes to this record · 1 product changed in this update
Note
- Before
- Capacity range describes supported configurations; the score remains anchored to the reviewed 10.2 kWh reference stack, not the 66.5 kWh maximum.
- After
- Same T-HS10.2 two-module reference retained:10.2kWh nominal,9.1kWh published usable at90%DoD/0.2C/+25C. AUusable family9.1–59.8kWh;nominal10.2–66.5kWh remains descriptive. Configurable maximum100%DoD is inverter/system dependent;no ACenergy/runtime orothermarket equivalence inferred.
Usable energy / DoD (%): Evidence sources
- Before
- https://au.solaxpower.com/products/tsys-hs51.html; https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
- After
- https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
Cycle life (cycles to 70%): Evidence sources
- Before
- https://au.solaxpower.com/products/tsys-hs51.html; https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
- After
- https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
Title
- Before
- Not previously recorded
- After
- Measured usable energy and configurable discharge limits
Ranges
- Current text
- checked: 2026-10-05; market: AU; max: 59.8; min: 9.1; range label: 9.1–59.8 kWh; source revision: SolaX Australia HS51 V1.92,650.00071.00.EN-AU;PDF2 exact T-HS10.2 usable-energy column; source url: https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf; unit: kWh
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Usable energy / DoD (%)Source revision
- Current text
- SolaX Australia TSYS-HS51 V1.9 datasheet and Australian warranty V1.6 reviewed 2026-08-06. First-market DE overlay review 2026-08-31: official German catalogues recorded for the remaining 17 AU+US identities; Australian and United States overlays and scores unchanged. Australian V1.92 (650.00071.00.EN-AU) energy/test basis reconciled 2026-10-05: 9.1 kWh usable at 90% DoD versus 10.2 kWh nominal for the unchanged two-module reference; maximum 100% DoD is configurable and system-dependent. Warranty and regional approval review dates unchanged.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheetSummary
- Before
- Not previously recorded
- After
- T-HS10.2 remains the two-module scored reference: 10.2 kWh nominal, with 9.1 kWh published usable energy at 90% DoD, 0.2C charge/discharge and +25°C. The Australian sheet lists a 9.1–59.8 kWh usable family range, separate from 10.2–66.5 kWh nominal. A maximum of 100% DoD is settable, but available DoD depends on the compatible inverter and system configuration; this does not replace the stated usable-energy test. AC-delivered energy and backup runtime also depend on inverter losses, reserves and loads. The >6000-cycle maker statement uses 90% DoD, 25±2°C, 0.5C and 70% end of life. Cell-maker identity remains unresolved; the CB56 sample evidence applies to standard TB-HS51 and is not transferred to optimiser TB-HS51O.
Evidence sources
- Before
- Not previously recorded
- After
- https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
8 changes to this record · 61 products changed in this update
DE Support Note
- Before
- Not previously recorded
- After
- de.solaxpower.com lists TSYS-HS51 including scored T-HS10.2. The warranty table uses T-BAT-SYS-HV-S51 / TB-HS51 for the same module family. T-BAT H 5.8 is not transferred. Manufacturer listing is established; distributor inventory is not inferred.
DE Evidence sources
- Before
- Not previously recorded
- After
- https://de.solaxpower.com/products/tsys-hs51.html; https://de.solaxpower.com/uploads/file/solax-eu-garantiebestimmungen-und-bedingungen-de.pdf; https://de.solaxpower.com/warranty.html; https://www.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en.pdf
DE Certifications
- Before
- Not previously recorded
- After
- The SolaX Germany TSYS-HS51 product page names T-HS10.2 through T-HS66.5. The German warranty table names T-BAT-SYS-HV-S51 / TB-HS51. That naming difference is disclosed and is not treated as a second identity.
DE Grid and installation context
- Before
- Not previously recorded
- After
- High-voltage DC battery. German grid conformity belongs to the site inverter and installation. No cross-product suitability is inferred.
DE Status
- Before
- Not previously recorded
- After
- available
DE Warranty conditions
- Before
- Not previously recorded
- After
- labour: No unconditional full-term owner-selected labour entitlement was established.; registration: The German warranty table starts the T-BAT-SYS-HV-S51 / TB-HS51 ten-year term at the earlier of first installation or manufacture plus 9 months. Accessories and tool kits are excluded.; remedy: The applicable SolaX warranty instrument controls repair or replacement.; removal reinstallation: No unconditional removal and reinstallation entitlement was established.; transferability: The reviewed German warranty surface does not establish an unrestricted later-owner transfer right.; transport: No unconditional full-term freight entitlement was established.
Source revision
- Before
- SolaX Australia TSYS-HS51 V1.9 datasheet and Australian warranty V1.6 reviewed 2026-08-06
- After
- SolaX Australia TSYS-HS51 V1.9 datasheet and Australian warranty V1.6 reviewed 2026-08-06. First-market DE overlay review 2026-08-31: official German catalogues recorded for the remaining 17 AU+US identities; Australian and United States overlays and scores unchanged.
DE Warranty scope
- Before
- Not previously recorded
- After
- Germany; the German warranty table names T-BAT-SYS-HV-S51 / TB-HS51 with a ten-year standard term from the earlier of first installation or manufacture plus 9 months. Accessories and tool kits are excluded. The T-BAT H 5.8 and US T-BAT SYS HV 5.0 families are not transferred onto this TSYS-HS51 record.
8 changes to this record · 78 products changed in this update
Evidence sources
- Before
- Not previously recorded
- After
- https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
Value
- Before
- Not previously recorded
- After
- The Australian datasheet states more than 6,000 cycles at 100% depth of discharge, 25C, 0.5C and 70% end of life.
State
- Before
- Not previously recorded
- After
- reviewed_absence
Value
- Before
- Not previously recorded
- After
- No battery-only round-trip efficiency is published in the reviewed Australian TSYS-HS51 datasheet.
Confidence
- Before
- Not previously recorded
- After
- high
Confidence
- Before
- Not previously recorded
- After
- high
State
- Before
- Not previously recorded
- After
- supported
Evidence sources
- Before
- Not previously recorded
- After
- https://au.solaxpower.com/products/tsys-hs51.html; https://au.solaxpower.com/uploads/file/solax-tsys-hs51-datasheet-en-au.pdf
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.
- AU market evidence checked
- Plain-language warranty summary checked
- Series benchmark evidence checked
- Core scorecard evidence checked
- DE market evidence checked
- Australian certification source identity verified
- US market evidence checked
Scored by Solar Analytica Research
Further reading from Findings
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.
Our reading
TSYS-HS51 scores 71, placing 8 of 76 in the Performance & Value class against a class average of 63.6. Its strongest scoring dimension is capacity & usability (93), running 8.9 points above the class average on this dimension. Guarantee & Backbone (56) is the dimension with the most room to move. Key specifications: LFP, 6.1 kW continuous output.
Dietreich Farquharson · review.solar