The assessment
How it scores, by category
Market position
The data
All-in-one energy system
Presents storage and power conversion as one integrated product or product platform.
- Product role
- Battery modules, inverter functions and controls are packaged as one purchasing architecture.
- Published range
- 5–48 kWh
- Phase
- Single phase
- 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: 8 kWh in the scored configuration. These values may have different measurement conditions.8 kWh usableScored configuration: GW8K-EHA-G20 with GW8.3-BAT-D-G20 (8.0 kWh usable). Published range 5–48 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.
Capacity range describes supported configurations; the score remains anchored to the named reviewed reference configuration, not the largest stack.
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
84 / 100#3 of 90 batteriesWhole-home, seamless (<20ms)
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. Capacity range describes supported configurations; the score remains anchored to the named reviewed reference configuration, not the largest stack. Scored model: GW8K-EHA-G20 with GW8.3-BAT-D-G20 (8.0 kWh usable) · checked 2026-07-31. Evidence.
Sources & references · checked 2026-08-16
Strong evidence coverage
17 of 17 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 claim7 rows
- EnduranceManufacturer claim4 rows
- SafetyCertified or regulator-listed1 of 4 rows beyond claim
- Warranty & backingManufacturer claim1 row
- FitManufacturer claim1 row
- 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. How the evidence puzzle works
Record revision. ESA G20 datasheet 20260616 EN V2.1, AU/NZ warranty Rev 1.0 dated 2025-07-03, and CER battery and inverter exports reviewed 2026-08-07
- Sourced valuesData card →
- Warranty summary10-year product warranty →
Show 2 more
- Archived copy of the primary sourcePDF ↗
- Safety certificationManufacturer ↗
Product record history
One earlier entry recorded a source recheck rather than a change to the published figure, and is 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://www.goodwe.com.au/Ftp/EN/Downloads/Datasheet/GW_ESA-3-10kW_Datasheet-EN.pdf
- After
- https://cer.gov.au/document/cec-approved-solar-batteries-0; https://www.goodwe.com.au/Ftp/EN/Downloads/Datasheet/GW_ESA-3-10kW_Datasheet-EN.pdf
2 changes to this record · 4 products changed in this update
AU Warranty conditions
- Current text
- labour: Service rebates are conditional and do not establish full labour cover.; registration: Authorised supply and installation conditions apply. The terms apply to units bought from channels authorised by GoodWe and installed in Australia or New Zealand (Geographical Scope). Installation must be by a skilled person or third-party installer (Preconditions 3) and is to be performed by qualified installers (Warranty Exceptions 3). A claim needs proof of the original purchase (Preconditions 5) and the correct product serial number (Warranty Exceptions 13).; remedy: Repair, replacement or equivalent hardware at GoodWe's option.; removal reinstallation: Removal and reinstallation are not an unconditional entitlement.; transferability: No subsequent-owner transfer right was found in the governing terms.; transport: Transport support is conditional and capped.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
AU market evidenceWarranty throughput+4 in JSON recordUS Support Note
- Current text
- The ESA G20 platform is not offered in the United States. The ESA, EHA and G20 codes appear in no series page or index entry of GoodWe's United States download centre (the per-series datasheet lists load by script and were not read), the platform is absent from the United States product navigation entirely, and no ESA or EHA code appears on any California Energy Commission list. GoodWe publishes this platform on its global, Europe, Middle East and Africa, and Australia and New Zealand sites. GoodWe publishes no separate United States legal entity: the US site imprint names GoodWe Technologies Co., Ltd. of Suzhou, China, with a US contact office at 201 E Pine St #910, Orlando, FL 32801, sales +1 925-304-3430 and service +1 888-418-0775, and a named US distributor list rather than an installer locator. The California Energy Commission lists GoodWe under the Chinese parent company name.
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+2 in JSON record
2 changes to this record · 109 products changed in this update
12 changes to this record · 78 products changed in this update
State
- Before
- Not previously recorded
- After
- reviewed_absence
Confidence
- Before
- Not previously recorded
- After
- high
Evidence sources
- Before
- Not previously recorded
- After
- https://www.goodwe.com.au/Ftp/EN/Downloads/Datasheet/GW_ESA-3-10kW_Datasheet-EN.pdf
Value
- Before
- Not previously recorded
- After
- The exact battery table publishes at least 8,000 laboratory cycles without a retained-capacity endpoint.
Value
- Before
- Not previously recorded
- After
- The exact datasheet publishes battery-to-AC and inverter efficiencies but no complete system round-trip efficiency.
Evidence sources
- Before
- Not previously recorded
- After
- https://www.goodwe.com.au/Ftp/EN/Downloads/Datasheet/GW_ESA-3-10kW_Datasheet-EN.pdf
Value
- Before
- Not previously recorded
- After
- Reviewed 2026-08-25: The exact battery table publishes at least 8,000 laboratory cycles without a retained-capacity endpoint. No cycles-to-70% value is substituted into the score.
Confidence
- Before
- Not previously recorded
- After
- high
State
- Before
- Not previously recorded
- After
- reviewed_absence
Evidence sources
- Before
- Not previously recorded
- After
- https://www.goodwe.com.au/Ftp/EN/Downloads/Datasheet/GW_ESA-3-10kW_Datasheet-EN.pdf
Confidence
- Before
- Not previously recorded
- After
- high
State
- Before
- Not previously recorded
- After
- supported
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
- DE market evidence checked
- Australian certification source identity verified
- AU market evidence checked
- Plain-language warranty summary checked
- US market evidence checked
- Series benchmark 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
ESA G20 scores 65, placing 31 of 76 in the Performance & Value class against a class average of 63.6. Its strongest scoring dimension is capacity & usability (100), running 16.0 points above the class average on this dimension. Guarantee & Backbone scores 43, the lowest pillar for this product. The class average on guarantee & backbone is 55. Key specifications: LFP, 8.0 kW continuous output.
Dietreich Farquharson · review.solar