Three brands, one rule: every number on this page comes from the manufacturer datasheets, and where a figure is not published we say so instead of making one up. All three are modular LFP systems with blackout backup available. Which one suits you depends on your budget, your loads and how you live, and that is exactly what we help you work out.
Datasheet figures only. Where a manufacturer does not publish a figure, the table says Not published.
| Specification | Sigenergy SigenStor | Sungrow SBR | Sungrow SBH | Fox ESS CQ6 | Fox ESS CQ7 |
|---|---|---|---|---|---|
| Module size | 5.2, 6.0, 7.8 or 9.0kWh usable per module | 3.2kWh per module | 5.0kWh per module | 5.99kWh per module | 6.96kWh per module |
| Capacity range per stack | 5 to 54.24kWh (1 to 6 modules per tower) | 6.4 to 25.6kWh usable (2 to 8 modules) | 15 to 40kWh usable (3 to 8 modules), up to 4 units in parallel to 160kWh | 11.98 to 83.86kWh nominal (2 to 14 modules) | 13.92 to 97.44kWh usable (2 to 14 modules) |
| Chemistry | LFP (LiFePO4) | LFP (LiFePO4) | LFP (LiFePO4) | LFP (LiFePO4) | LFP (LiFePO4) |
| Continuous power | 2.5 to 4.6kW per module, up to 24kW per tower | Not published (max continuous current 30A) | 10.56 to 28.16kW by model | Not published (recommended 50A, max 100A; output set by the paired inverter) | 9.22 to 64.51kW nominal by model |
| Warranty | 10 years; at least 70% of usable energy retained, or minimum throughput, whichever first | 10 years; at least 70% of initial capacity; unlimited cycles for daily self consumption and backup | 10 years; at least 70% of initial capacity; unlimited cycles for daily self consumption and backup | 12 years; at least 70% retention, or minimum throughput, whichever first | 10 years; at least 70% retention, or minimum throughput, whichever first |
| IP rating | IP66 | IP55 | IP55 | IP65 | IP65 |
| Backup capability | 0ms load side switchover with Sigen Energy Gateway (manufacturer test conditions) | Via Sungrow SH hybrid inverter; switch time under 10ms per SH datasheets | Via Sungrow SH hybrid inverter; under 10ms, built in 63A whole home bypass on SH T series | Via EPS output of Fox ESS hybrid inverter; switch under 20ms (H1-G2) or under 10ms (H3-Pro) | Via EPS output of Fox ESS hybrid inverter; switch under 20ms (H1-G2) or under 10ms (H3-Pro) |
| Coupling and inverter integration | DC coupled five in one stack with built in energy controller (5 to 12kW single phase, 5 to 30kW three phase), or Sigen Hybrid inverter with battery controller | DC coupled to Sungrow SH hybrid inverters (SH T three phase, SH8.0/10RS single phase) | DC coupled to Sungrow SH hybrid inverters (SHT, SHRS and SHRS-20 series) | DC coupled to Fox ESS hybrids: H1-G2, KH/HA series, H3 series | DC coupled to Fox ESS hybrid inverters |
Specifications per manufacturer datasheets, July 2026. Subject to change. Round trip efficiency is not published by Sigenergy or Sungrow for these batteries, so we do not quote one; Fox ESS states above 95 percent for CQ6 and CQ7.
The most integrated system we install: hybrid inverter, battery modules and an optional EV DC charger stack into one IP66 tower, with 0ms switchover backup when paired with the Sigen Energy Gateway. It suits households that want seamless whole home backup, plan to charge an EV from solar, or simply want one tidy unit on the wall instead of three boxes. The trade off is price, and that Sigenergy is the youngest company of the three, founded in 2022.
Sigenergy in detailThe track record pick. Sungrow has been building inverters since 1997 and opened its first Australian office in 2012. The SBR suits smaller single phase homes with fine grained 3.2kWh steps, while the SBH delivers serious power for larger and three phase homes, up to 28.16kW from a full stack. The trade off: backup runs through the SH hybrid inverter with a brief sub 10ms switchover rather than a 0ms gateway, which most households never notice.
Sungrow in detailThe value and scale pick. The CQ6 stacks 5.99kWh modules from 11.98kWh all the way to 83.86kWh, carries the longest warranty of the three at 12 years, and was launched specifically for the Australian market. It suits budget conscious households, big consumers, and rural properties that want room to grow. The trade off: the ecosystem is more conventional, with backup via the inverter EPS circuit rather than a dedicated gateway.
Fox ESS in detailNot sure which way to lean? That is our job. Call 0420 141 078 and tell us how you use power, and we will tell you which system we would put in our own garage in your situation.
Tell us how you use power and we will match the right system, at a fixed price.
Tell us what you are after and we will come back to you within one business day with real numbers for your property. Prefer to talk? Call 0420 141 078.
