Sofar vs DynESS vs Felicity. What the cheapest price actually buys.
Three of the cheapest home battery brands on the Australian market, compared honestly by a company that doesn't sell any of them. Manufacturer-sourced specs, warranty fine print, who actually honours the paperwork in Australia — and when the cheapest battery isn't worth it.
Reviewed by the Mission Green Energy Team · Updated July 2026
The comparison a seller
can't write.
Sofar, Dyness and Felicity regularly show up at the very bottom of Australian battery quotes. All three are real LFP products from real factories — the honest question is what the gap between their price and a premium quote actually pays for.
A high-voltage 5.12 kWh LFP module (4.60 kWh usable per Sofar's warranty document) from Shenzhen SOFARSOLAR, designed to stack with Sofar's own HYD hybrid inverters. IP65-rated, wall or floor mounted, 2.5 kW rated power per module — per Sofar's published datasheet (V2.0.0, June 2025).
A high-voltage stacked LFP tower in five sizes, 6.74 to 20.24 kWh usable (T7–T21), paired with a compatible hybrid inverter. Notably, Dyness publishes a dedicated Australian warranty with a named local entity, a 70% retention guarantee and per-model throughput figures.
Low-voltage 51.2 V LFP floor units of 14.3 or 15 kWh nominal that parallel up to 15 units, from Guangdong Felicity New Energy. Often the cheapest sticker in the market. Big capacity per dollar; the trade-offs live in the warranty fine print and the indoor-only IP21 rating.
How do the specs
compare, head to head?
All figures below are drawn from each manufacturer's own published datasheet, user manual or warranty document, as at July 2026. "Not published" means exactly that — confirm with the supplier before you rely on it.
| Feature | Sofar BTS 5K | Dyness Tower (T7–T21) | FelicityESS LUX-Y (48280/48300) |
|---|---|---|---|
| Usable Capacity | 4.60 kWh per 5.12 kWh module (warranty doc) | 6.74 – 20.24 kWh (AU warranty doc) | 14.3 / 15 kWh nominal at ≥95% DoD; usable figure not published as such |
| Chemistry | LFP (Lithium Iron Phosphate) | LFP (Lithium Iron Phosphate) | LFP (Lithium Iron Phosphate) |
| Continuous Power | 2.5 kW rated per module; scales with stack + inverter | Not published as kW on the documents we reviewed; AU warranty caps continuous charge/discharge at 0.5C, and output depends on the paired hybrid inverter | 150 A max continuous at 51.2 V per unit (manual); output depends on the paired inverter |
| Warranty | 10 years product + performance — but the published document we located is expressed for Europe; confirm the Australian version in writing | 10 years, Australia-specific document (20240726-AU) | 10 years from installation, Australian policy — coverage is tiered (see below) |
| Capacity Retention Guarantee | 70% of usable energy, or minimum throughput of 13.1 MWh per module, whichever first | 70% of usable energy for 10 years, plus a minimum throughput per model (e.g. 38.90 MWh for the T10) | Not published in the AU warranty policy we reviewed — which is itself information |
| Cycle Life | Not published on the current datasheet | ≥6,000 cycles at 70% SOH (AU warranty appendix) | ≥6,000 cycles (0.2C, 80% DoD test conditions, manual) |
| Coupling (AC/DC) | High-voltage DC (400 V nominal) via Sofar hybrid inverter | High-voltage DC stack via compatible hybrid inverter | Low-voltage 51.2 V via compatible hybrid inverter |
| Modular / Stackable | Yes — extendable, incl. mixing new and existing modules (datasheet) | Yes — five tower sizes, T7 to T21 | Yes — up to 15 units in parallel (to 225 kWh) |
| Backup Capable | All three depend on the paired hybrid inverter for backup — the battery alone doesn't provide it. Confirm backup behaviour with your installer. | ||
| Inverter Lock-in | Warranty requires a SOFARSOLAR inverter unless compatibility is confirmed with Sofar in advance (warranty doc) | Warranty excludes use of an incompatible inverter; check the Dyness compatibility list | Manual lists compatibility with Felicity and third-party inverters via CAN/RS485; confirm your model in writing |
| Enclosure Rating | IP65 (datasheet) — outdoor-capable | Not confirmed from the documents we reviewed — confirm with the supplier | IP21 (manual) — indoor installation |
| App / Monitoring | Via Sofar's monitoring platform | Via the Dyness app / paired inverter | Built-in WiFi + FelicityESS app (manual) |
| Local AU Entity in the Warranty | Global service email; Australia-specific warranty document not located by us | Dyness Aus Pty Ltd, Epping NSW — ABN, phone and AU service email named in the warranty | Importer: Felicity Solar Australia Pty Ltd, Surry Hills NSW — mobile-number contact |
| VPP Ready | Not published — confirm with the supplier | The AU warranty explicitly contemplates VPP participation | Not published — confirm with the supplier |
Sofar BTS 5K
in detail.
Sofar (Shenzhen SOFARSOLAR) is a large inverter maker whose BTS 5K battery module rides on its own HYD hybrid inverter range. Specs below are per Sofar's published datasheet (V2.0.0, June 2025) and battery warranty document, as at July 2026.
Modular High-Voltage Design
Each BTS 5K module is 5.12 kWh total (4.60 kWh usable per the warranty document) at 400 V nominal, with 2.5 kW rated power per module. Modules stack, and Sofar's datasheet allows extending capacity by mixing new and existing batteries — useful if you want to start small.
Outdoor-Capable Build
The IP65 enclosure rating is the strongest of the three brands here, and the datasheet quotes wall or floor mounting, a 50 kg module weight and up to 24 months of storage without charging. Cycle life, however, is not published on the current datasheet — ask for it in writing.
The Warranty Catch
Sofar's published warranty is 10 years with 70% usable-energy retention or 13.1 MWh throughput per module, whichever comes first — solid terms on paper. But the copy we could locate is expressed for the European territory, and it requires a SOFARSOLAR inverter unless compatibility is confirmed in advance. Get the Australian document before you sign.
Best suited for: Buyers already committed to a Sofar hybrid inverter who want cheap, weather-rated modular storage and are willing to obtain the Australia-specific warranty terms in writing first. The effective inverter lock-in is the main structural trade-off.
Dyness Tower
in detail.
Dyness (Dyness Digital Energy Technology) sells the Tower series — stacked high-voltage LFP batteries in five sizes. Specs below are per Dyness's product pages and its Australian warranty terms (document 20240726-AU), as at July 2026.
Five Sizes, Real Numbers
Tower T7 through T21 covers 6.74 to 20.24 kWh usable — and unusually for a budget brand, those usable figures come from the Australian warranty document itself, alongside a minimum energy throughput per model (25.91 MWh for the T7 up to 77.78 MWh for the T21).
The Strongest Paper Trail Here
Dyness warrants 70% of usable energy for 10 years, covers ≥6,000 cycles at 70% SOH in the warranty appendix, and names a local entity: Dyness Aus Pty Ltd in Epping NSW, with an ABN, an Australian phone number and a dedicated AU service email. Of the three brands on this page, that is the most concrete published answer to "who fixes it".
Read the Conditions
The same document has teeth: claims must be reported within 30 days, installation must be by an accredited installer, continuous charge/discharge is capped at 0.5C, and using an incompatible inverter voids cover. Continuous power in kW isn't published on the pages we reviewed — it depends on the stack and the paired hybrid inverter, so get it quoted for your configuration.
Best suited for: Budget buyers who want the paperwork to actually say something — a published Australian warranty with a retention guarantee, throughput numbers and a named local entity — and who are pairing with a hybrid inverter from the Dyness compatibility list.
FelicityESS LUX-Y
in detail.
FelicityESS (Guangdong Felicity New Energy) is often the cheapest sticker in the Australian market. Specs below are per FelicityESS's published user manual for the LUX-Y-48280LG01 / LUX-Y-48300LG01 and its Australian warranty policy, as at July 2026.
Big Capacity Per Dollar
One floor-standing unit is 14.3 or 15 kWh nominal at 51.2 V, with ≥95% depth of discharge, ≥6,000 rated cycles (0.2C, 80% DoD test conditions) and parallel expansion to 15 units. On raw kWh per dollar, this is usually the cheapest path to a big battery in Australia.
What the Manual Actually Says
IP21 protection means indoor installation, the unit weighs 135 kg on castor wheels, and communication is CAN/RS485 with a published compatibility approach for third-party inverters. Recommended charge/discharge is 120 A with a 150 A continuous maximum. These are honest, published numbers — the manual is more forthcoming than the warranty.
The Warranty Is the Story
The Australian policy we reviewed runs 10 years from installation but is tiered: year one, faulty cells are replaced; years two to seven, repair first, replacement if repair fails; years eight to ten, free inspections only — excluding labour and parts. It publishes no capacity-retention percentage and no throughput guarantee. The importer named is Felicity Solar Australia Pty Ltd, Surry Hills NSW, with a mobile-number contact.
Best suited for: Eyes-open buyers on a hard budget who want maximum kilowatt-hours indoors, have a confirmed-compatible inverter, and have read the tiered warranty closely enough to know what years eight to ten actually cover. Not the pick if you're buying the warranty as much as the battery.
What does the price gap
actually pay for?
A home battery is a 10-to-15-year appliance bolted to your house. The cheapest sticker is only a bargain if the things the gap strips out are things you genuinely don't need. Here's the gap measured on dimensions you can verify, not vibes.
- The warranty promise itself. Premium brands typically warrant a specific end-of-warranty capacity (and publish the throughput cap that goes with it). Among these three: Dyness publishes 70% retention plus per-model throughput in an Australian document; Sofar publishes 70% retention or 13.1 MWh per module in a document expressed for Europe; the Felicity AU policy we reviewed publishes no retention percentage, and its years eight to ten provide free inspections only, excluding labour and parts. Read that sentence twice before comparing "10 years" with "10 years".
- Who honours it in Australia. A warranty is only as strong as the entity answering the phone. Dyness names Dyness Aus Pty Ltd (Epping NSW, ABN 89 666 753 313 — active on the ABR, AU phone and service email). Felicity names its importer, Felicity Solar Australia Pty Ltd (Surry Hills NSW), contactable on a mobile number. For Sofar we could locate a global service email but no Australia-specific warranty document. None of this proves anything about how a claim goes — but it's the paper trail you'd rely on, and you can weigh it before you buy.
- Installer familiarity and service labour. Warranty documents from all three route claims through your installer or supplier first. If your installer has never handled the brand — or is no longer trading — a valid claim can still cost you the labour. Our guide to what happens when your installer goes bust explains why this orphan risk applies doubly to thin-presence brands.
- Spec completeness. Where a premium datasheet publishes usable energy, continuous power in kW, cycle life and VPP compatibility, budget datasheets often leave gaps: Sofar's current BTS 5K datasheet omits cycle life, Dyness doesn't publish Tower continuous power in kW on the pages we reviewed, and Felicity doesn't publish a usable-kWh figure or VPP position. We could not find these published — which is itself information about how much verification the brand invites.
- Firmware and spare parts over 15 years. This is the genuine unknown for all three: none publishes a firmware-support or spare-parts commitment we could verify, and we won't invent a history either way. Treat it as an open question — and price the risk accordingly.
For a plain-English walkthrough of retention percentages, throughput caps and the traps in battery fine print, see our guide to decoding home battery warranties.
Which budget battery
suits you — if any?
There is no winner here, and "none of them" is a legitimate answer. This is how the three tend to sort out on their own published terms.
Choose Dyness
You want the budget option whose Australian warranty actually commits to something: 70% retention, published throughput per model, ≥6,000 cycles and a named local entity with an ABN. Pair it with an inverter from their compatibility list and report faults promptly.
Choose Sofar
You're already buying a Sofar hybrid inverter and want matching, outdoor-rated (IP65) modular storage. Just obtain the Australia-specific warranty terms in writing first, because the published copy we found is expressed for Europe and effectively ties you to Sofar's inverter ecosystem.
Choose Felicity
Your budget is hard, you want maximum indoor capacity, and you've read the tiered warranty with clear eyes — including that years eight to ten are inspections only and no retention percentage is guaranteed. It's a rational eyes-open buy, not a like-for-like substitute for a premium battery.
So is the cheapest battery worth it?
We don't sell any of these three brands, so here's the answer with nothing riding on it.
All three are genuine LFP batteries with published 10-year warranty periods, and any of them can be a defensible purchase in the right circumstances. The cheapest battery is not automatically a trap — but it is automatically a different product from a premium battery, even when the kWh number matches. What you're giving up isn't usually chemistry or cells; it's the strength of the promise wrapped around them.
- Buying on a hard budget with a compatible inverter? A budget battery can be rational. Size it conservatively, get inverter compatibility confirmed in writing by the battery manufacturer (Sofar's warranty in particular expects its own inverter unless cleared in advance), use an accredited installer, and keep every document. Of the three, Dyness currently publishes the most substantial Australian warranty commitments.
- Buying for whole-home backup or a 10-year payback plan? Be careful. Backup behaviour for all three depends on the paired inverter, and a payback plan that needs a decade of trouble-free operation is leaning hard on the years of the warranty where budget cover is weakest — Felicity's AU policy, for instance, provides inspections only in years eight to ten. If the maths only works with heroic assumptions, the maths is telling you something.
- Tempted specifically by the cheapest sticker? Do one exercise before signing: write down what the gap between that quote and a premium quote buys — retention guarantee, local entity, installer network, published specs — and decide which of those you're comfortable living without for 15 years. If the answer is "all of them", buy the cheap battery with a clear conscience. If any one of them made you pause, that pause is the real price tag.
- Not sure a battery stacks up at all? Then the honest answer might be no battery yet. Rebates, tariffs and your usage pattern decide this, not the brand. We'll run the numbers for your actual home and tell you if waiting or a smaller system beats every option on this page — that outcome is on the table in every assessment we do.
Every figure above traces to the manufacturers' own published documents as at July 2026, with the gaps flagged as gaps. If a supplier quotes you a spec that isn't in those documents, ask them to show you where it's published — a good one will.
Budget battery
FAQ.
They are functional LFP batteries from established factories, not scams, but the more useful question is what stands behind them in Australia. All three use lithium iron phosphate chemistry, publish 10-year warranty periods and quote cycle lives of 6,000 or more in their own documents, so on paper they do the same job as batteries costing thousands more. The honest differences sit around the battery: how much of the spec sheet is actually published, how strong the warranty fine print is, and who honours it locally. Dyness publishes an Australia-specific warranty with a 70 percent capacity-retention guarantee, the Felicity policy we reviewed promises tiered repair or replacement but publishes no retention percentage, and the Sofar warranty copy we could locate is written for Europe. Bought eyes-open, correctly sized and installed by an accredited installer, they can be rational budget choices; bought on sticker price alone, they are a bet on year eight.
Mostly because of what surrounds the cells, not the cells themselves. Lithium iron phosphate cells are now close to a commodity, and budget brands often use respectable cell suppliers. What the lower price typically strips out is everything a premium brand spends money on: a large local office and service team, a deep accredited-installer network, long firmware and spare-parts commitments, marketing, and stronger warranty promises such as guaranteed capacity retention. Distribution also tends to run through importers rather than a large manufacturer subsidiary, which keeps overheads low. None of that means the battery will fail — it means the price gap is buying you less of the things that matter when something goes wrong in year eight of a 10-year warranty.
Sometimes, and it is worth being honest about when. Cheapest can be rational when your budget is genuinely fixed, your hybrid inverter is confirmed compatible in writing, you size the battery conservatively, and you go in expecting a working appliance rather than a premium ecosystem. It stops being rational when your household depends on whole-home backup, or when your payback maths needs more trouble-free years than the brand's realistic support life in Australia can promise. A battery is a 10-to-15-year appliance bolted to your house, and the warranty is only as good as the entity honouring it here. If the saving up front is smaller than the cost of one out-of-warranty failure, the cheap battery was the expensive one.
Five things, all verifiable before you sign. First, read the actual Australian warranty document, not the brochure: the length, any capacity-retention percentage, throughput caps, and what the later years really cover — one policy we reviewed drops to free inspections only in years eight to ten. Second, confirm who honours the warranty locally: a named Australian entity with an ABN, address and phone number beats an overseas email address. Third, get inverter compatibility in writing from the battery manufacturer, because incompatible pairings can void the warranty. Fourth, ask your installer whether they have actually installed and serviced the brand, and who pays the labour on a warranty claim. Fifth, treat unpublished specs as information: if a manufacturer does not publish a figure, do not assume it.
Under Australian Consumer Law your first line of recourse is the retailer or installer who sold you the system, which is why the installer's own survival matters as much as the brand's. Behind them sits the manufacturer or its importer. Dyness's Australian warranty names Dyness Aus Pty Ltd in Epping NSW, with an ABN, phone number and service email. The FelicityESS policy we reviewed names its importer, Felicity Solar Australia Pty Ltd in Surry Hills NSW, reachable on a mobile number. For Sofar we could locate a global service email but not an Australia-specific warranty document, which is worth resolving in writing before you buy. If your installer disappears, that local entity is all that stands between you and an orphaned system, and thin-presence brands make that risk sharper.
No. Mission Green does not currently sell or install Sofar, Dyness or Felicity batteries, and we wrote this comparison anyway because people tempted by the price deserve a straight answer rather than a sales pitch. We have no commercial stake in whether you buy one, and everything above comes from each manufacturer's own published documents, with unknowns flagged as unknowns. The brands we do carry sit at different price points, and in a free assessment we will compare a budget battery honestly against them — including telling you when a smaller system, a different brand, or no battery at all is the right call. That is the standard we publish and measure ourselves against.