The SOFAR Powerall 20 kWh battery
CATL LiFePO4 cells, 97.8% round-trip efficiency, AC-couples to your existing solar. Free upgrade to 25 kWh before 30 June.
What's actually in the box
| Spec | Value |
|---|---|
| Capacity | 20 kWh nominal (~18–19 kWh usable at 90% DoD) |
| Cell chemistry | CATL LiFePO4 (LFP) — thermally stable, long cycle life |
| Round-trip efficiency | 97.8% (manufacturer-rated, test conditions) |
| Backup switchover | Under 10 ms (manufacturer-rated) |
| Inverter | 5 kW SOFAR hybrid inverter included |
| IP rating | IP65 — indoor or outdoor installation |
| Expandable | Yes — add 5 kWh modules anytime, mix old and new |
| Cooling | Natural convection — no fans, completely silent |
| Certifications | CEC approved · AS/NZS 4777 · IEC 62619 · UN38.3 |
| Monitoring | SOFAR app + web portal, Wi-Fi built in |
| Warranty | 10 yr equipment + 5 yr install — handled in-house by Service Tech |
| Model | SOFAR Powerall ESI 5K + BTS 5K |
Verified reviews coming soon
We're collecting verified customer feedback for this offer. In the meantime, your written quote sets out product details, warranty terms, install scope, rebate assumptions and an expected-performance estimate before you commit.
A major global manufacturer, not a label brand
SOFAR is a publicly listed global hybrid-inverter manufacturer with 37 GW+ shipped across 100+ countries. The Powerall runs CATL LiFePO4 cells — the same chemistry trusted by leading EV brands — and is on the CEC approved product list for Australia.
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CATL cells, world #1 LFP
The Powerall runs CATL LiFePO4 — the same cell chemistry trusted by leading EV brands. Thermally stable, long cycle life.
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97.8% round-trip efficiency
Manufacturer-rated under test conditions — more of your stored solar comes back as usable power. Real-world efficiency varies with temperature, load and settings.
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Completely silent
Natural convection cooling. No fans, no hum in the garage wall, nothing to clog or fail.
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Expandable, no lock-in
Add 5 kWh modules anytime, mixing old and new freely. Some competitors require voltage-matched modules — the Powerall doesn’t care.
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AC-couple ready
If you've got a 6.6 kW PV system already, we add the Powerall as storage without ripping out your existing inverter.
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Stock on-shore
Two-week install only works when parts are in the warehouse. SOFAR-only focus means they always are.
We'll quote Fox ESS or VoltX if you specifically ask for them. We just don't recommend them — the comparison below shows why.
SOFAR vs Fox ESS vs VoltX
Many battery quotes are for around 10 kWh. We install 20 kWh — double the storage — for a comparable or lower price. At ~$474/kWh installed, the Powerall works out well below the typical installed cost per kWh of comparable Fox ESS or VoltX systems.
| Feature | SOFAR Powerall (ECS) | Fox ESS CQ6 ~20 kWh | VoltX Neovolt 20.4 kWh |
|---|---|---|---|
| Capacity | 20 kWh (expandable 25 kWh+) | ~20 kWh (3–4 x 5.99 kWh modules) | 20.4 kWh (modular) |
| Usable capacity | ~18–19 kWh | ~18 kWh | ~19.4 kWh |
| True all-in price | $8,990 incl. inverter | ~$8,500–$9,000 + inverter ($1,500–$3,000 extra) | Not publicly listed |
| Inverter included | ✓ Yes — 5 kW SOFAR hybrid | ✗ No — Fox inverter extra | ✓ Built-in AC unit |
| Cell chemistry | CATL LFP (world #1) | LFP | LFP (supply unspecified) |
| Round-trip efficiency | 97.8% (manufacturer-rated) | ~95% | ~90–92% |
| Warranty | 10 yr equipment + 5 yr install — in-house, QLD | 12 years (CQ6) | 10 years |
| Australian support | ✓ In-house — QLD | △ Melbourne office only | △ Reseller-dependent |
| CEC listed | ✓ Yes | ✓ Yes | ✓ Yes |
| Brand founded | 2013 — 13 years, 37 GW+ | 2019 — 7 years | Under 5 years |
| Expandable | ✓ 5 kWh modules, mix freely | △ Complex — modules must match 0.5 V | ✓ Yes — modular |
Comparison based on publicly available product specifications and indicative market pricing checked in June 2026. Competitor products, pricing, warranties and support arrangements can change. Compare written quotes, datasheets, warranty documents and install scope before deciding.
Bottom line: the Powerall at $8,990 gives you 20 kWh — double the storage of a typical Fox ESS or VoltX quote at a similar or lower price. ~$474/kWh installed vs $850–$1,040/kWh for competitors. Plus inverter included, CATL cells, a 10-year equipment warranty and a 5-year Service Tech installation warranty, serviced locally.
Quick answers on the SOFAR Powerall
The most common questions we get on the quote call, answered here.
Is $8,990 really all-in?
Yes, for a standard residential install: SOFAR Powerall 20 kWh battery, 5 kW hybrid inverter, fitting and commissioning — with the federal battery rebate already applied at point of sale. The quote confirms the final figure before you commit. A switchboard upgrade or difficult access are the only things that change it.
How much of the 20 kWh can I actually use?
Around 18 to 19 kWh, at 90% depth of discharge. That compares well — most competitors quote nominal capacity and deliver a similar or lower usable share.
Can it AC-couple to my existing solar?
Most of the time, yes. The Powerall AC-couples to existing PV between 3 kW and 13 kW — that covers most residential systems installed since 2018. We confirm compatibility on the quote call.
Does it keep the lights on in a blackout?
It can, when backup is included in your quoted configuration. Switchover is under 10 ms (manufacturer-rated), but backup scope depends on the selected backup circuits, available battery charge, inverter output limit and network isolation requirements. A standard install may not provide whole-house backup — we confirm the backup scope in your written quote.
What's the warranty and who handles it?
10 years on the SOFAR equipment, plus a 5-year Service Tech warranty on the installation. Service Tech handles warranty claims and warranty-related fault diagnosis in-house for the life of the warranty. Non-warranty faults — third-party equipment, internet or app issues, network events, storm damage, misuse or customer-requested changes — may be chargeable. You call us, not an overseas call centre.
Can I add more storage later?
Yes. Add 5 kWh SOFAR modules anytime — old and new modules mix freely, no system replacement, no new inverter. And if you sign before 30 June 2026, the first extra module is free.
20 kWh now. 25 kWh free before 30 June.
The Powerall stacks in 5 kWh modules — and old and new modules mix freely. Sign before 30 June 2026 and we add a fifth module at install, about $3,000 of estimated extra-storage value, at no extra charge, subject to quote terms.
Want more later? Add modules anytime. No new inverter, no new cabling, no system replacement.
$8,990 fitted. Quote in 7 days. Power on in 2 weeks.
Tell us about your house and your power bill. We come back with a fixed quote in 7 days and have you live within 10 business days of deposit — or we credit you $200 for every week we're late.