Battery comparison
Fox ESS CQ7 vs CQ6 vs EQ4800
Direct, like-for-like comparison of the three most-installed Fox ESS home batteries in Australia — so you can size the right system without guesswork.
Quick verdict
CQ7 for large homes, EVs and three-phase acreage. CQ6 is the sweet-spot for most family homes. EQ4800 is the best-value retrofit for small households.
| Spec | CQ7 | CQ6 | EQ4800 |
|---|---|---|---|
| Module size | 6.96 kWh per module (CQ7-S / CQ7-M) | 12 kWh (single tower) | 4.8 kWh per module |
| Chemistry | LFP (LiFePO4), 100% DoD | LFP | LFP |
| Usable capacity range | 13.92 – 97.44 kWh (2–14 modules) | Up to 60 kWh | Up to 28.8 kWh (6 modules) |
| Operating voltage | 104.4 – 919.8 V (high voltage) | High voltage | High voltage |
| Max charge / discharge current | 80 A | 50 A | 25 A |
| Round-trip efficiency | >95% | >95% | >95% |
| Inverter pairing | Fox ESS H3 / AIO hybrid | Fox ESS H3 hybrid | Fox ESS H1/H3 hybrid |
| Blackout backup | Yes — whole-home capable (inverter dependent) | Yes — essential circuits | Yes — essential circuits |
| Phase support | Single & three-phase (via inverter) | Single & three-phase | Single phase |
| Operating temperature | -10 to 55°C (-25 to 55°C with (w) warm-up variant) | -10 to 50°C | -10 to 50°C |
| Ingress protection | IP65 (indoor/outdoor) | IP65 | IP65 |
| Certifications | IEC 62619, IEC 61000-6-1/2/3/4, UN38.3 | IEC 62619, UN38.3 | IEC 62619, UN38.3 |
| Warranty | 10 years / 60% capacity | 10 years / 60% capacity | 10 years / 60% capacity |
| Best use case | Large homes, EVs, acreage, small commercial | Mid-large family homes | Smaller homes, retrofit |
| Installed price (after rebate) | $14k–$27k (13.9–41.8 kWh) | $11k–$14k | $6k–$8k |
CQ7 — best for power users
Pros
- + Scales to 97.44 kWh on one controller
- + 80A max — runs whole home + EV
- + Three-phase & off-grid capable
- + IP65 + (w) -25°C variant
Cons
- – Higher upfront than EQ4800
- – Overkill for <15 kWh/day homes
CQ6 — best all-rounder
Pros
- + Single 12 kWh tower — clean install
- + Strong essential-circuit backup
- + Stackable to 60 kWh
Cons
- – No three-phase whole-home backup
- – Older architecture than CQ7
EQ4800 — best value retrofit
Pros
- + Lowest entry price after rebate
- + Perfect for small homes / units
- + Plug-and-play modular
Cons
- – 25A limit — no heavy simultaneous loads
- – Single-phase only
- – Caps at 28.8 kWh
Which one should I choose?
- Under 15 kWh/day, single-phase, existing solar: EQ4800 (2–3 modules).
- 15–25 kWh/day, family home, want a clean single tower: CQ6 (12–24 kWh).
- 25 kWh+/day, EV, ducted A/C, or plans to expand: CQ7-L4 or L6 — best $/kWh and most future-proof.
- Three-phase, acreage, small commercial, off-grid: CQ7-L6 to L14 with AIO inverter.
Battery FAQs
Fox ESS comparison FAQs
Not sure which Fox ESS is right for you?
Tell us your bills and we'll size CQ7, CQ6 or EQ4800 — with rebate-applied pricing in writing.