FoxESS vs Sungrow: which battery suits your home?
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Short answer: both are modular stacks with a 10-year warranty that ends at 70% or a throughput cap [SB-S055, SB-S050, C]. FoxESS goes bigger per stack (up to 41.93 kWh) and has a dated price list from Solar National, a Sydney installer (as at July 2026); Sungrow comes in smaller steps (from 6.4 kWh) but we found no dated price for its common SBR sizes [SB-S054, SB-S137, SB-S099, SB-S098]. Both need their own brand's hybrid inverter [SB-S099, SB-S054, E].
Side by side (as at 3 November 2026)
| Usable storage | Power | Round-trip | Warranty | Installed price, seller's own date | Backup | CEC listing | |
|---|---|---|---|---|---|---|---|
| FoxESS EQ4800 | 4.66 kWh modules, 9.32–41.93 kWh usable (2–9 modules) [SB-S054, SB-S072, C] | 4.48–20.16 kW nominal, by stack [SB-S054, C] | pack over 95% [SB-S054, C] | 10 yrs; 70% or throughput (L2 39.32 … L9 176.94 MWh), first [SB-S055, C] | from $2,660 after federal rebate, 14.4 kWh (nominal, as listed; module count not confirmed), incl. Fox hybrid inverter; Solar National, Sydney (NSW), as at July 2026 [SB-S099, C] | MISSING | EQ4800-L2–L9 listed to 14 Nov 2027 [SB-S072, C] |
| Sungrow SBR | 3.2 kWh modules, 6.4–25.6 kWh usable, 100% depth of discharge [SB-S137, SB-S071, C] | 5.76–15.36 kW rated DC per older V1.2 datasheet (2021) [SB-S139, C]; not in current V5 [SB-S137] | MISSING | 10 yrs; 70%; unlimited cycles for self-use/backup, else a cap (SBR096 26.88 … SBR256 71.68 MWh) [SB-S050, C] | No dated price yet for SBR sizes; one 30 kWh package from $13,268.78 after discount, as at 3 Nov 2026, model not stated [SB-S098, C] | MISSING until the SH inverter datasheet is read | SBR064–256 listed to 30 Dec 2026 [SB-S071, C] |
Two things to check on a FoxESS quote
- Which stack is it? The Sydney list says 14.4 kWh. That looks like a nominal figure for 3 modules (about 13.98 kWh usable), but the page doesn't say, so ask [SB-S099, SB-S054, E].
- Is the price still current? It's dated July 2026. The discount is set by the install date, so the after-discount figure may have moved [SB-S004, C].
Every EQ4800 size and the dated list: FoxESS sizes and prices.
Two things to check on a Sungrow quote
- The listing date. The SBR listing we read ends 30 December 2026 [SB-S071, C]. For an install in 2027, ask to see the current listing.
- No published price for SBR sizes. Installer quotes vary, so get at least two in writing.
Discount at typical sizes (our arithmetic, not a quote)
6.8 STCs per usable kWh to 14 kWh, 60% to 28 kWh, May–Dec 2026 installs [SB-S036, SB-S001, C]; last trade $39.65 [SB-S095, C]. The factor drops to 5.7 for installs from January 2027 [SB-S036, C]. The discount is set by the installation date [SB-S004, C]. It needs a CEC-listed, VPP-capable battery installed with solar by an SAA battery-endorsed installer [SB-S003, C]. The STC price moves, so your installer's figure will differ. Official rules: cer.gov.au and dcceew.gov.au.
- FoxESS EQ4800-L3 (13.98 kWh): 95 STCs, about $3,767 [SB-S036, SB-S001, SB-S095, E].
- Sungrow SBR128 (12.8 kWh): 87 STCs, about $3,450 [SB-S036, SB-S001, SB-S095, E].
Who each one suits
FoxESS suits you if you want a big stack (20 kWh+) for less per kWh, on a new Fox hybrid inverter [SB-S054, SB-S099, C/E].
FoxESS is not for you if you want a brand with a long Australian track record; ask your installer about local support (support details MISSING).
Sungrow suits you if you already have a Sungrow hybrid inverter, or want to start small [SB-S137, C].
Sungrow is not for you if you want a published, dated price before you call anyone [SB-S098].
Other comparisons
Sigenergy is the other brand here with a full dated price list [SB-S092, C]: how Sigenergy compares with Sungrow and the Tesla and modular-stack comparison. If you'd rather have one 13.5 kWh unit with backup in the price, see how Sungrow compares with the Powerwall [SB-S052, SB-S061, C]. In Queensland there's no state rebate open [SB-S044, C]; before you book, use the Brisbane installer checklist.
Ask your installer, in writing
- The exact model on the CEC approved list, its usable kWh and listing end date [SB-S026, SB-S071, C].
- How many STCs the quote assumes, and for which install date [SB-S004, C].
- What stays on in a blackout, and the line-item cost of backup.
- Warranty years, the 70% figure and the throughput cap.
Rules checked 3 November 2026. Next scheduled check: before 1 January 2027 (STC step-down), and monthly for WA and NSW.