Which Portable Power Stations Have Replaceable Battery Modules

01

Start With the Answer

Only two portable power stations have user-replaceable battery modules that you can actually buy today: the Sorein G Series and the Worksport COR. Add EcoFlow Power Kits, which is a fixed-install system rather than a portable station, and the list is three.

Every other model, including almost every station marketed as expandable, seals its internal battery inside the case. When that battery degrades past usefulness, the whole unit goes with it.

Three things worth knowing before you pick. On the G Series, capacity and output expand independently: adding a battery raises capacity, adding an inverter channel raises output, so a future module change can never reduce your output. The COR's single pack is 960Wh, which means several packs to reach backup capacity. Power Kits is a cabinet system built for cabins and RVs, not something you carry.

The models below support replacement on paper, but their modules have gone:

If your station is one of the popular expandable units, BLUETTI Apex 300, Anker SOLIX F3800, Jackery Explorer 5000 Plus, EcoFlow DELTA Pro 3 or Zendure SuperBase V, the internal battery cannot be replaced. External packs add capacity, not service life.

• BLUETTI AC300 and AC500: this generation is discontinued, modules are out of stock, and the replacement module reduces output
• BLUETTI AC180T: discontinued in both the US and Europe
• Point Zero Energy Titan: the company closed on June 3, 2025
• RUNHOOD Rallye 600: the host is for sale, the battery modules are not
• Inergy Flex 1500: the host is for sale, both battery models are out of stock

02

Why "Modular" Rarely Saves the Battery

The word modular covers three different abilities that get used interchangeably.

Replaceable means the battery and the host are physically separate, so a pack that degrades or fails can be bought fresh and swapped in while the rest of the system keeps working. Expandable means you can attach an external battery to add capacity, but the host's internal battery is sealed: the external pack is easy to replace, the internal one means a repair ticket or a dead unit. Hot-swappable goes further still, letting you change packs while the load keeps running, which makes swapping both a repair method and a runtime method.

The relationship between them matters. Only a design with the battery fully outside the host is replaceable by construction, because anything you can add, you can also take off. Most expandable products are hybrids: the external pack adds and swaps, while the internal battery that degrades first does not move.

That is why the popular models above cannot save their own batteries. Their modularity is a way to add capacity, not a way to extend life. Five years in, you face the same question: send it in, or scrap it. And when you scrap it, the inverter, the charging circuit and every port are still fine. Only the cell welded inside the shell is dead.

03

Five Popular "Expandable" Models Cannot Replace the Battery

Every model below appears on best expandable power station lists. All of them accept external batteries. In all of them, the internal battery that degrades first is sealed.

EcoFlow has put the limit in writing. The DELTA Pro 3 product page FAQ answers the compatibility question directly: "Is the EcoFlow DELTA Pro 3 Extra Battery compatible with the EcoFlow DELTA Pro? No, not supported." The same applies between hosts and with DELTA Pro Ultra. Third-party summaries reach the same conclusion: each expansion battery pairs with exactly one host, and buying the wrong one is a return, not a repair.

So what does a replacement actually cost? Third-party repair guidance for 2026 puts the working rule at 60 percent: once an official battery replacement costs more than 60 percent of a new unit of the same capacity, replace the unit instead.

BLUETTI is the cleanest illustration of that arithmetic. The B230 expansion battery lists at $999, while the AC200MAX it serves lists at $1,199. One battery is 83 percent of a whole new station. Measured against the AC200MAX's original $1,699, the ratio is 76 percent. Both readings land past the threshold where replacement stops making financial sense. Prices read from BLUETTI's US store on October 24, 2026, and will move with promotions.

04

Worksport COR: The Lightest Option Still on Sale

Worksport is a US brand aimed at truck beds and jobsites, and the COR is its first power station. It runs a 48V architecture with a 960Wh LFP pack weighing 19.7 pounds, handle included, that lifts out of the body for a swap or a standalone charge. The company states the point plainly: "Power doesn't stop. Just swap the battery." The site adds: "When running low, lift out the entire battery pack by the built-in handle and drop in a charged one."

It also describes the industry's problem more sharply than most: "Every other power station in this class makes you choose: either live with a fixed battery that hits end-of-life with the whole unit, or daisy-chain external expansion packs through cables that snag, expose pins, and clutter your setup."

On paper it holds up: 2,000W pure sine output, four 120V outlets, and UL2054, UL2743 and UN38.3 certification. Those safety marks matter more on a swappable design than on a sealed one, because a removable pack means exposed contacts and a connector that has to survive repeated cycles. Pricing is the most honest in this group: $799 for the system with one battery, $499 for a spare pack, $220 for a standalone charger. One pack is about 62 percent of the full system, which tells you the real cost structure of modularity better than any spec sheet.

The limits are capacity and track record. A single pack is 960Wh, so home-backup capacity takes several, and the product line has not been on the market long enough to prove itself over years of use.

05

BLUETTI: Both Modular Attempts Are Discontinued

BLUETTI approached battery separation from two directions, and both have been withdrawn.

The first was a host with no internal battery. AC300 and AC500 are pure inverter units, with all capacity coming from external B300, B300S or B300K modules. BLUETTI called it the first 100 percent modular power station, and the modules can be replaced in whole or in part. Architecturally this is the textbook answer: the battery is outside, so the swap logic holds.

That generation has closed. The AC300 page title on the US store carries a discontinued marker and still lists $1,399. B230, B300 and B300S have all been discontinued, with B300K named as the replacement and accessories noted as "subject to stock availability." B300K does work backwards with older hosts through an adapter cable, which deserves credit. But the supply gap is not theoretical. An AC500 owner wrote in the official community forum in March 2026: "B300K is out of stock. B300 discontinued. B500 out of stock ... Are there any options at all to expand the batteries for the AC500?" There is also a measured regression: testing found that pairing an AC500 with B300K instead of B300S drops single-battery output from 4,500W to 3,000W. The new module is not just unavailable, it is weaker.

The second attempt was hot-swapping. AC180T, now listed as Pioneer MD in the US, was the only serious hot-swap product from a major brand: two 716.8Wh LFP packs for 1,433.6Wh total, 1,800W with both packs and 1,200W with one, live swapping without dropping the load, battery compatibility with BLUETTI's own car fridge, and a five-year warranty.

Its outcome is in the page title too: discontinued, in both the US and Europe, with $799 against an original $1,299 still shown. A major brand tried this path and pulled back, which means the form has never been commercially validated. Anyone shopping for hot-swap today has to weigh how long the ecosystem will outlive the purchase.

06

Point Zero Energy Titan: The Most Radical Design, and the Company Is Gone

Point Zero Energy built modular solar generators in Idaho from 2019 and claimed credit for pioneering the category. The design was an inverter module with 3,000W output and dual MPPT charging at roughly 14 kilograms, plus stackable battery packs in NMC 2,000Wh or LFP 2,500Wh. Packs stacked directly, with no cabling between them, and could be removed, replaced and carried individually. The company said there was no hard limit on stack count and warranted the packs for five years. As a pure expression of battery-as-module, nothing beat it.

The company has closed. A notice on the homepage announced it would be "closing June 3, 2025" alongside a "Going Out of Business Sale," and the founders explained why: "with growing market saturation, the rise of overseas brands, and increasing costs, continuing in this environment is no longer sustainable for our small, family-run business." The notice is signed Dave and Shari, Founders.

This was not a quiet disappearance. It was an announcement, a liquidation, then a closed site. The last normal capture of the domain was June 14, 2025, with no snapshots in the sixteen months since, against a record of monthly captures before that.

The distributor pages are still up, but the prices are display only. The Point Zero Energy collection at ShopSolar carries three products and seventeen configurations, and every one is out of stock, from the $2,395 bare inverter to the $12,995 full build. This is the state most easily misread: the page is alive, the inventory is long gone.

A thorough design does not survive its maker. A Titan owner who lost the original charger wrote on a forum in January 2026: "Point Zero is out of business and I haven't been able to find a replacement anywhere." Others have resorted to parting out working systems, because once module production stops, expansion and repair both become scavenger hunts.

The last listed prices tell their own story. A Titan Boost with one 2,500Wh LFP pack was $3,420, and the same line with two packs was $4,945. The difference of $1,525 is what one module actually cost, a figure you can verify by subtracting two configurations rather than trusting an estimate. The price was never the problem. What it proves is something else: the working life of a modular product is set not by its architecture but by how long the company lasts.

07

RUNHOOD and Inergy: The Host Is for Sale, the Battery Is Not

These two belong together, because they failed in exactly the same way: the station stayed on the shelf after the part that makes it replaceable disappeared.

RUNHOOD is a California brand that has built hot-swap stations since 2021. The Rallye 600 was its signature product: a 600W host with two battery bays and a 324Wh Energy Bar module that could be pulled and replaced while output kept running. For devices that reboot on any interruption, such as a CPAP, that is a real capability rather than a spec line. Modules charge independently over mains, car, solar or USB-C, and clipping on an AC or USB module turns one pack into a standalone power bank.

The problem is that the batteries are gone. As of October 24, 2026, none of the twelve SKUs in RUNHOOD's online catalog is an Energy Bar module. What remains is hosts, adapter modules, cables, a backpack and a newer B3600/F3600 system. The HE600 page still says to pair it with an Energy Bar 324 sold separately, while the Energy Bar 324 link now returns a 404. A hot-swap system with the host for sale and the batteries unavailable is a system that cannot function.

The specifications limit it further: NMC chemistry, 1,000 cycles to 80 percent, 600W total output. Fine for light duty, not enough for household backup loads.

Inergy is the earlier modular player: 1kWh NMC modules that plug in directly, a company claim of up to 96 stacked packs for about 96kWh, and a tactical variant with a US military collaboration in its history.

Its site is still live and the host still ships. Flex 1500 TL lists at $1,450 and can be ordered normally. But both batteries are out of stock as of the same date: Flex Battery at $900 and Flex Tactical Battery at $1,275. That is the RUNHOOD pattern again, where the body of the system sits on the shelf and the part that makes it replaceable does not. NMC rather than LFP costs it another notch on cycle life and thermal stability, and at 1kWh per module with almost no brand presence, it is hard to recommend even if stock returns.

08

EcoFlow Power Kits: Proof the Big Brands Can Do It

EcoFlow's Power Kits is a 48V cabinet system with 2kWh and 5kWh LFP batteries that stack independently and can be added or replaced. As an architecture it works completely, and the US store currently has two of its three configurations in stock.

It belongs here for one reason: it shows a major brand already has the engineering to build replaceable batteries, and has simply chosen not to bring that architecture down to its portable line. For a cabin or an RV install, it is a legitimate answer. For anything you carry, it is not.

09

How the G Series Puts the Battery Outside

The G Series is built on the opposite assumption from everything above: the battery is never sealed in.

G2400, G4800, G7200 and G9600 all use the same 2.4kWh 48V LFP module, stacked on a 9.5kg base. One module type runs from the smallest build to the 9.6kWh maximum, rated for 4,000 cycles to 80 percent. A pack that fails is a pack you replace, not a unit you scrap.

Two consequences follow from that arrangement. Capacity and output are decoupled: output comes from the inverter channel while the module only stores energy, so a future module generation cannot quietly reduce your output the way the AC500 and B300K pairing did. And a detachable battery also pays off in handling. A G4800 assembled weighs around 59.5kg, which is a two-person lift, but it splits into base, modules and chassis to carry upstairs piece by piece.

10

Who Supports Replacement, and What It Costs

Put every product that supports battery replacement in one table and the difference is in the second column.

Read across the rows, not down the columns. Every design here can swap a battery, and five of the eight cannot currently sell you one. Swapping is an engineering question. Availability is a business question, and that half decides whether the system lasts ten years.

11

Four Questions to Ask Before Ordering

If what happens after the battery degrades matters to you, ask these before you pay.

• Can you buy a module in three years? Whether the maker keeps supplying modules after a model change, or falls back on "subject to stock availability." Point Zero owners are parting out systems and the RUNHOOD module link is already a 404.
• Will the next host accept this battery? EcoFlow's official answer is no, with each expansion battery tied to a single host.
• Does a replacement module reduce the specification? Moving an AC500 from B300S to B300K costs 1,500W of single-battery output.
• What share of the system price is one module? Past 60 percent, plan for a new unit instead. BLUETTI's own arithmetic comes to 83 percent.

12

Conclusion

Replaceable batteries remain a minority position in this market, and five companies on that path have already fallen: Point Zero Energy closed outright, BLUETTI discontinued a whole generation across both its modular lines, and RUNHOOD and Inergy still list hosts whose batteries cannot be bought. None of them failed because the architecture was wrong. Several were more thorough than anything still on sale. They were eliminated by whether modules stayed purchasable.

So the real dividing line is not replaceable or not. It is three narrower questions: whether modules stay available long term, whether they carry across generations, and whether a replacement costs you specification. Among portable stations on sale today that survive those questions, there are two: the Worksport COR at 960Wh and our own G Series from 2.4 to 9.6kWh. Their capacity ranges do not overlap, so neither replaces the other.

Ask those three questions before you order. Most product pages will not answer them for you.