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
- 6.31–15.79 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
100% of this battery’s nominal capacity is usable, 6.31 kWh in the scored configuration.6.31 kWh usableScored configuration: Reserva 6.3 (6.31 kWh usable). Published range 6.31–15.79 kWh.
No reserve is withheld at the stated depth of discharge.
At a sourced 100% depth of discharge the usable and nominal figures are the same number, so no separate nominal capacity is stated.
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
68 / 100#26 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. Capacity range describes supported configurations; the score remains anchored to the named reviewed reference configuration, not the largest stack. Scored model: Reserva 6.3 (6.31 kWh usable) · checked 2026-07-31. Evidence.
Sources & references · checked 2026-08-31
Strong evidence coverage
14 of 14 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 revision. Fronius Reserva datasheet and battery warranty terms reviewed 2026-07-31. First-market US overlay review 2026-08-31: official United States catalogues recorded; Australian and German overlays and scores unchanged.
- Sourced valuesData card →
- Warranty summary10-year product warranty →
Show 2 more
- Archived copy of the primary sourcePDF ↗
- Cycle life (cycles to 70%)Manufacturer ↗
Product record history
5 changes to this record · 61 products changed in this update
Source revision
- Before
- Fronius Reserva datasheet and battery warranty terms reviewed 2026-07-31
- After
- Fronius Reserva datasheet and battery warranty terms reviewed 2026-07-31. First-market US overlay review 2026-08-31: official United States catalogues recorded; Australian and German overlays and scores unchanged.
US Certifications
- Before
- Not previously recorded
- After
US Support Note
- Before
- Not previously recorded
- After
- Fronius USA's current hybrid path is GEN24 Plus with BYD Battery-Box Premium HVM US. Reserva 6.3 through 15.8 does not appear on the United States technical-data catalogue. The Australian Reserva page and an en-US manuals locale are not a United States sale path. Reserva Pro is a separate AU not_reviewed record and is not merged here. HVM US is not transferred onto this Reserva record.
US Evidence sources
- Before
- Not previously recorded
- After
- https://www.fronius.com/en-au/australia/solar-energy/home-owners/products-and-solutions/store-solar-power/reserva; https://www.fronius.com/en-us/usa/solar-energy/about-us/press/fronius-gen24plusandbattery-re-usa-090624; https://www.fronius.com/en-us/usa/solar-energy/installers-partners/technical-data-overview; https://www.fronius.com/en-us/usa/solar-energy/installers-partners/technical-data/all-products
US Status
- Before
- Not previously recorded
- After
- unavailable
1 change to this record · 147 products changed in this update
2326D810167F
- Current text
- accepted at: 2026-08-09; category: battery; certification model: Reserva 6.3; jurisdiction: au_cec; match method: exact_normalized_single_record; product slug: fronius-reserva-au; source key: data/batteries/fronius_reserva.json; source manufacturer name: Fronius International GmbH; validation: approved at: 2025-08-01; candidate model: Reserva 6.3; data confidence: High; evidence url: https://cer.gov.au/document/cec-approved-solar-batteries-0; expires at: 2027-12-31; list data version: au-cer-battery-2026-08-20-b3f077cbe945; list retrieved at: 2026-08-27T04:30:11Z; listing status at validation: listed
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Australian approved-product source identity
1 change to this record · 9 products changed in this update
DE Grid and installation context
- Before
- Not previously recorded
- After
- Reserva's IEC 62619, VDE 2510-50 and IEC 62477-1 evidence is battery-safety evidence, not standalone German grid approval. Final grid conformity is installation-specific; no product pairing is asserted.
12 changes to this record · 78 products changed in this update
Value
- Before
- Not previously recorded
- After
- Reviewed 2026-08-25: The current product manual publishes 6,000 cycles to at least 60% state of health, not the rubric's 70% endpoint. No cycles-to-70% value is substituted into the score.
Evidence sources
- Before
- Not previously recorded
- After
- https://manuals.fronius.com/html/4204260564/en-US.html; https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Reserva_EN_web.pdf
Value
- Before
- Not previously recorded
- After
- The current product manual publishes 6,000 cycles to at least 60% state of health, not the rubric's 70% endpoint.
Value
- Before
- Not previously recorded
- After
- The exact datasheet publishes battery round-trip efficiency of at least 95%.
Evidence sources
- Before
- Not previously recorded
- After
- https://manuals.fronius.com/html/4204260564/en-US.html; https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Reserva_EN_web.pdf
Evidence sources
- Before
- Not previously recorded
- After
- https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Reserva_EN.pdf
7 changes to this record · 13 products changed in this update
DE Support Note
- Before
- Not previously recorded
- After
- Current German exact-family support is established. Battery safety credentials do not create a standalone grid-interconnection claim.
DE Evidence sources
- Before
- Not previously recorded
- After
- https://www.fronius.com/de-de/germany/solarenergie/eigenheim/produkte-und-loesungen/strom-speichern/reserva; https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DB_Fronius_Reserva_DE.pdf; https://www.fronius.com/~/downloads/Solar%20Energy/Terms%20of%20Warranties/SE_ToW_Battery_DE.pdf
Ranges
- Current text
- checked: 2026-07-31; market: AU; max: 15.79; min: 6.31; range label: 6.31–15.79 kWh; source revision: Fronius Reserva datasheet reviewed 2026-07-31; source url: https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Reserva_EN.pdf; unit: kWh; checked: 2026-08-16; market: DE; max: 15.79; min: 6.31; range label: 6.31–15.79 kWh; source revision: German Reserva datasheet; source url: https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DB_Fronius_Reserva_DE.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.
Range sourcePrimary datasheetDE Warranty scope
- Before
- Not previously recorded
- After
- Germany; ten years, 80% retained capacity and model-specific throughput ceilings, with Warranty Plus labour and national standard freight.
DE Certifications
- Before
- Not previously recorded
- After
- IEC 62619:2022, CE, VDE 2510-50, IEC 62477-1 and UN 38.3 are listed for Reserva.
DE Warranty conditions
- Before
- Not previously recorded
- After
- labour: Directly related removal and replacement labour is covered when performed by Fronius or its commissioned installer.; registration: No registration or persistent-connectivity prerequisite appears; authorised sale and qualified commissioning are required.; remedy: Fronius may repair, replace with an equivalent or newer equivalent, or provide prorated credit.; removal reinstallation: Approved direct removal and replacement labour is covered; unrelated system work is excluded.; transferability: Remaining coverage transfers with ownership without restarting the term.; transport: National standard freight is covered; express freight, duties and travel are excluded.
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
- US market evidence checked
- DE market evidence checked
- Australian certification source identity verified
- AU market evidence checked
- Plain-language warranty summary 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
Reserva scores 67, placing 17 of 74 in the Performance & Value class against a class average of 63.0. Its strongest scoring dimension is capacity & usability (91), running 7.9 points above the class average on this dimension. Energy Ecosystem (44) is the dimension with the most room to move. Key specifications: LFP, 95% round-trip efficiency, 6.55 kW continuous output.