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Performance & Value

ECS CQ7

6.96–28.8 kWh · LFP · DC-coupled

FoxESSReleased 2024

72/ 100

Very good

Global

LFP

The verdict. In our Performance & Value class, FoxESS ECS CQ7 leads on capacity & usability. Home-battery reliability is rarely independently verified, so judge on chemistry, safety certification and the backing company.

8thof 20 in Performance & ValueTop halfclass average 69.2
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The assessment

How it scores, by category

Capacity & Usability80
Power & Efficiency75
Longevity (verified)72
Safety & Chemistry80
Guarantee & Backbone64
Energy Ecosystem58

Market position

8thof 20 in Performance & ValueTop half
577281

Our reading

ECS CQ7 scores 72, placing 8 of 20 in the Performance & Value class against a class average of 69.2. Its strongest scoring dimension is capacity & usability (80). Energy Ecosystem (58) is the dimension with the most room to move. Key specifications: LFP, 94% round-trip efficiency, 5.0 kW continuous output.

The data

Chemistry
LFP
Power
5.0kW
Round-trip
94%
Cycle life
6,000cycles

Capacity guarantee: minimum retained at year 10

7.0 kWhfull5.6at yr 10
708090100Rated capacity 100%Guaranteed floor 80.0%80.0%0yr2yr4yr6yr8yr10yr
Rated capacity (reference)Guaranteed floor: 80.0% at yr 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

67 / 100#16 of 28 batteries
fleet low 46median 68fleet high 92
No backupGrid-forming

Whole-home (via hybrid inverter)

Continuous power
5kW
Switchover
<20ms (seamless)
Off-grid solar recharge
Yes, documented
AC terminal protection
Standard protection

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.

Before you buy

Two things to check

Local positionUse a market view to check local availability, approvals and warranty scope.

Ask the installer: What usable capacity, backup power and warranted operating conditions will the installed ECS CQ7 configuration deliver?

Verification & sources

Market context

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 reviewed reference configuration, not the largest stack. Scored model: ECS CQ7 (7.2 kWh per unit, stackable to ~4 units / ~28.8 kWh) · checked 2026-06-20. Evidence.

Sources & references · checked 2026-06-20

Limited evidence coverage

3 of 30 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.

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.

View the open evidence register

Evidence timeline

Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.

  1. AU market evidence checked
  2. Core scorecard evidence checked
  3. Series benchmark source checked
  4. Plain-language warranty summary checked

Scored by Solar Analytica Research

Further reading from Signals

Stay across the benchmark.

New scorecards, score changes and market signals, published as they happen.