An expandable power station is a portable battery that accepts add-on battery packs, so you can buy 2-5 kWh today and grow to 10, 20 or even 60 kWh later without replacing the unit. That matters because most buyers do not know their real backup needs until the first long outage. The catch: every brand uses its own packs, the limits differ by model, and some popular stations cannot be expanded at all.
This guide compares the expandable Jackery, Anker SOLIX and Bluetti stations we have in stock: how far each one grows, what each added kWh costs, which packs fit which station, and which setup fits a fridge-and-Wi-Fi outage versus a whole-home system with 240V loads. If you still need to work out your wattage first, start with our solar generator sizing guide.
Expandable power stations compared
All prices are our store prices before discount codes, checked October 29, 2026. "Max (one unit)" is the manufacturer's limit with the maximum number of packs on a single station; most large models can double that by linking two stations.
| Power station | Base capacity | Output (surge) | Expansion pack | Max (one unit) | Station price | Pack price ($/kWh) |
|---|---|---|---|---|---|---|
| Jackery Explorer 5000 Plus | 5,040 Wh | 7,200W 120/240V (14,400W) | Battery Pack 5000 Plus, up to 5 | 30.2 kWh (60 kWh with 2 units) | $3,149 | $2,779.99 ($552) |
| Anker SOLIX F3800 Plus | 3,840 Wh | 6,000W 120/240V (9,000W) | BP3800, up to 6 | 26.9 kWh (53.8 kWh with 2 units) | $2,609.99 | $1,929.99 ($503) |
| Jackery HomePower 3600 Pro Max | 3,584 Wh | 4,000W at 240V / 2,000W at 120V (8,000W) | Battery Pack 3600 Plus, up to 5 | 21.5 kWh (43 kWh with 2 units) | $1,799 | $1,349 ($376) |
| Jackery HomePower 3600 Plus | 3,584 Wh | 3,600W 120V (7,200W) | Battery Pack 3600 Plus, up to 5 | 21 kWh | $1,709 | $1,349 ($376) |
| Bluetti Apex 300 | 2,765 Wh | 3,840W 120/240V (7,680W lifting) | B300K or B500K | Platform: 58 kWh (3 units, 18 packs) | $1,699 | B300K $1,249 ($452); B500K $1,999 ($390) |
| Jackery Explorer 2000 Plus | 2,042 Wh | 3,000W 120V (6,000W) | Battery Pack 2000 Plus, up to 5 | 12.2 kWh (24 kWh with 2 units) | $899 | $799 ($391) |
| Jackery HomePower 2000 Plus v2 | 2,048 Wh | 2,400W 120V (4,800W) | Battery Pack 2000 Plus v2, up to 5 | 12.3 kWh | $1,069 | $899 ($439) |
| Anker SOLIX C2000 Gen 2 | 2,048 Wh | 2,400W 120V (4,000W) | BP2000 Gen 2, 1 only | 4.1 kWh | $899.99 | $749.99 ($366) |
| Jackery HomePower 1000 Plus v2 | 1,024 Wh | 1,800W 120V (3,600W) | Battery Pack 2000 Plus v2, up to 5 | 11.3 kWh | $699 (white) | $899 ($439) |
Not expandable (good stations, but what you buy is what you get): Anker SOLIX C1000 Gen 2, Anker SOLIX S2000, Jackery HomePower 3000, Jackery Explorer 2000 v2 and Explorer 1000 v2. The Bluetti Elite 200 V2 accepts B80, B230 and B300 packs, which we do not currently stock, and the Anker SOLIX F3000 uses the BP3000, which is also not in stock - so we have left both out of the picks.
How expansion actually works (and the limits that matter)
An expansion battery is just extra storage. It plugs into a dedicated port on the station, and the station's inverter, outlets and charge controller do all the work. Three consequences follow, and they decide which station you should buy:
- Adding packs adds runtime, not watts. An F3800 Plus with six BP3800 packs still delivers 6,000W. If you need more output, you link a second station (Anker, Jackery 5000 Plus and 3600 Plus/Pro Max, Bluetti Apex 300 and Explorer 2000 Plus all support this), which also doubles the inverter.
- Solar input does not grow with the battery. A 26.9 kWh F3800 Plus bank still charges from the same 3,200W of solar. With a 1,000W solar limit, as on the HomePower 3600 Plus, a 21 kWh bank needs several sunny days to refill. Big banks make sense when you also have generator or grid charging.
- Packs are brand- and model-specific. The Jackery Battery Pack 2000 Plus fits only the Explorer 2000 Plus; the Battery Pack 2000 Plus v2 fits the HomePower 2000 Plus v2 and 1000 Plus v2; the Anker BP2000 Gen 2 fits only the C2000 Gen 2 (not the older F2000); the BP3800 fits the F3800 and F3800 Plus. Always match the exact model name before ordering.
Sizing math: how many packs do you need?
Use this four-step method, the same one we use when customers send us their appliance lists.
1. Add up daily energy (Wh). Multiply each device's running watts by the hours it runs in a day. A typical outage list looks like this:
- Refrigerator: about 1,200-1,800 Wh a day (see our fridge runtime chart)
- Chest freezer: 600-1,000 Wh
- Wi-Fi router, modem and phones: 300-400 Wh
- LED lights for 6 hours: 300 Wh
- Gas furnace blower, 8 hours at 400W: 3,200 Wh
- Well pump, about 1 hour of total run time: 1,000-1,500 Wh
2. Divide by 0.85. Inverter and conversion losses mean you get roughly 85% of the rated capacity as usable AC power. Fridge + freezer + internet + lights = about 3,500 Wh / 0.85 = 4.1 kWh a day. Add the furnace and well pump and you are near 9.5 kWh a day.
3. Multiply by outage days, minus what solar refills. For a 3-day outage with no solar: 4.1 x 3 = 12.3 kWh. With 1,600W of portable panels in winter (about 3 sun hours x 0.75 = 3.6 kWh a day) you need only about 12.3 - 7.2 = 5.1 kWh of storage, because the panels refill 3.6 kWh on each of the first two days.
4. Count packs. Storage needed minus the station's own capacity, divided by pack size, rounded up. Example: 12.3 kWh on an F3800 Plus = (12.3 - 3.84) / 3.84 = 2.2, so 3 BP3800 packs (15.4 kWh total). The same 12.3 kWh on a HomePower 3600 Pro Max = (12.3 - 3.58) / 3.58 = 2.4, so 3 Battery Pack 3600 Plus units (14.3 kWh).
What each added kWh costs
When you plan to grow a system, the price of the packs matters more than the price of the station. Here is what one kilowatt-hour of added storage costs with each brand's expansion battery at today's store prices.
The cheapest storage comes from the Anker BP2000 Gen 2 ($366/kWh), but the C2000 Gen 2 stops at a single pack. For a system that keeps growing, the Jackery Battery Pack 3600 Plus ($376/kWh, 6,000 cycles) and Bluetti B500K ($390/kWh) give the lowest cost per kWh. The Jackery Battery Pack 5000 Plus is the most expensive per kWh but also the biggest single block (5,040 Wh), which keeps a 30 kWh system to six boxes instead of nine. For comparison, a fixed 48V wall or rack battery costs less per kWh again - see our whole-home battery backup cost guide - but needs an installed inverter instead of a plug-in station.
Our picks
Anker SOLIX F3800 Plus + BP3800 Expansion Battery - $3,998.99
7,680 Wh of LiFePO4 storage with 6,000W of continuous output (9,000W surge) at both 120V and 240V, including a 240V L14 twist-lock outlet for a transfer switch or a 240V well pump. It takes up to 3,200W of solar through two inputs, charges from a generator, and grows to 26.9 kWh with six BP3800 packs or 53.8 kWh and 12 kW with two stations. The station and pack are rated for 3,000 cycles and carry a 5-year warranty. Bought separately, the F3800 Plus ($2,609.99) plus one BP3800 ($1,929.99) costs $4,539.98, so the bundle saves about $540.
Jackery Explorer 5000 Plus + Battery Pack 5000 Plus - $5,579
10,080 Wh out of the box with 7,200W of continuous output (14,400W surge) and true 120/240V - enough to start a central AC unit up to 5 tons per Jackery's listing, plus well pumps and dryers. Each station takes up to five 5,040 Wh packs (30.2 kWh), and two paralleled stations reach 60 kWh. Up to 4,000W of solar input is the highest on this list, which matters once the bank gets large. Add the Smart Transfer Switch version ($6,429) for automatic home backup switching.
Jackery HomePower 3600 Pro Max + Battery Pack 3600 Plus - $3,159
7,168 Wh for $3,159 works out to about $441 per kWh for the whole system, and each extra Battery Pack 3600 Plus adds 3,584 Wh for $1,349. Cells are rated for 6,000 cycles, and the pack charges and discharges down to -4°F. The station delivers 4,000W at 240V through a NEMA 14-50 outlet (8,000W surge), which suits a 240V well pump or a home connection. The trade-off: on 120V circuits it is limited to 2,000W total, so heavy 120V loads such as a microwave plus a space heater will not run together. It expands to 21.5 kWh, or 43 kWh with two units.
Bluetti Apex 300 + B300K - $2,799
5,530 Wh with 3,840W of continuous output (7,680W lifting power) and simultaneous 120V and 240V outlets from one unit, plus a 0 ms UPS switchover and 12 kW of bypass capacity. The Apex 300 is built as a platform: up to three units and 18 B300K or B500K packs reach 58 kWh and 11.52 kW. We stock bundles up to two stations and four B300K packs ($8,497 for 16.6 kWh and 7,680W). Note that solar charging needs Bluetti's SolarX 4K accessory, and the B300K pack has a 3+1-year warranty versus 5 years on the station.
Anker SOLIX C2000 Gen 2 + BP2000 Gen 2 - $1,598.99
4,096 Wh and 2,400W (4,000W surge) at about $390 per kWh, with a TT-30 RV outlet, 800W alternator charging and a 5-year warranty on both units. The station weighs 41.7 lb and the pack 33.7 lb, so each piece is still a one-person carry - useful for RV owners and renters. Anker's own figure is up to 64 hours of dual-door fridge runtime with the pack attached. The limit is firm: one BP2000 is the maximum, so choose a bigger platform if you expect to need more than 4 kWh.
Jackery Explorer 2000 Plus - $899 (+ Battery Pack 2000 Plus $799)
The cheapest way into a system that can reach double-digit kWh. One station gives 2,042 Wh and 3,000W (6,000W surge) and takes up to 1,400W of solar; add up to five Battery Pack 2000 Plus units for 12.2 kWh, or link two stations for 6,000W, 120/240V and 24 kWh. Station plus one pack is $1,698 for 4,085 Wh ($416 per kWh). The cells are rated for 4,000 cycles, fewer than the newer v2 models.
Jackery HomePower 1000 Plus v2 + Battery Pack 2000 Plus v2 - $1,399
A 23.8 lb station with 1,800W (3,600W surge) paired with a 2,048 Wh pack for 3,072 Wh total. Both use 6,000-cycle LiFePO4 cells, and the station accepts up to five packs for about 11.3 kWh. It suits apartments, home offices and CPAP backup where you want a small unit on the shelf and the option to add storage later. If you need more output, the HomePower 2000 Plus v2 ($1,069, 2,400W) uses the same packs.
Which expandable station for which home?
| Your situation | Daily need | Good fit | Approx. cost |
|---|---|---|---|
| Apartment, fridge + internet + CPAP | 2-3 kWh | HomePower 1000 Plus v2 + 1 pack | $1,399 |
| RV or cabin weekends, 120V only | 3-4 kWh | C2000 Gen 2 + BP2000 | $1,599 |
| House, essentials for 1-2 days, budget first | 4-5 kWh | Explorer 2000 Plus + 1-2 packs | $1,698-$2,497 |
| House with 240V well pump, 2-3 days | 5-8 kWh | 3600 Pro Max + 1-2 packs or F3800 Plus + BP3800 | $3,159-$4,508 |
| House with furnace, well pump and more | 8-12 kWh | F3800 Plus + 2-3 BP3800 or Apex 300 + B300K packs | $3,899-$7,859 |
| Whole home incl. central AC | 20+ kWh | Explorer 5000 Plus + packs (two units for 60 kWh) | $11,139+ (20.2 kWh) |
Need help? Our solar kit calculator turns an appliance list into watts and watt-hours, and you can browse every add-on pack in solar generator extra batteries, or by brand: Jackery expansion batteries, Anker SOLIX expansion batteries and Bluetti expandable power stations.
Connecting an expandable station to your home
A larger battery bank tempts people to power more of the house. Do it through a manual transfer switch, an interlock kit with an inlet box, or the manufacturer's home panel (Anker Home Power Panel, Jackery Smart Transfer Switch), installed by a licensed electrician with a permit where required. Never backfeed a dryer outlet with a "suicide" cord - it can energize the utility line and injure line workers. Keep the station and packs indoors or in a dry garage within their temperature ranges; many packs stop charging below 32°F, while the Jackery Battery Pack 3600 Plus charges down to -4°F.
What buyers ask before expanding
These are the questions people actually search before they buy an expansion battery - taken from the searches that bring shoppers to our expansion-battery pages and from the questions Google shows for this topic:
- "Can I add expansion batteries later if I need more capacity?" Yes, if the station has an expansion port - every station in the comparison table does. Buy the station for the output you need now (120V or 240V, watts), then add packs once you know how long your outages last. Check that the pack is still sold for your exact model before you plan around it.
- "How much are the expansions?" $749.99 to $2,779.99 per pack at today's store prices, or $366 to $552 per added kWh (see the chart above).
- "Can I use a cheaper LiFePO4 battery through the solar port?" Some owners recharge a station from a separate 12V or 24V battery through the solar or car input. It works as a slow charging source, capped by the solar input wattage, but it is not true expansion: the station still runs from its own battery, and the brand's battery management and warranty do not cover the outside battery.
- "Can I mix brands?" No. Expansion ports are proprietary; a Jackery pack will not work with an Anker station, and even within a brand the packs are model-specific.
- "Is a 3,000 Wh power station enough for home backup?" For a fridge, Wi-Fi and LED lights (about 2 kWh a day) it covers roughly one day. For a multi-day outage, add one or two packs or 400-800W of solar.
- "Do expansion batteries work in cold weather?" They discharge in the cold, but most packs only charge above 32°F. The Jackery Battery Pack 2000 Plus v2 charges from 14°F and the Battery Pack 3600 Plus from -4°F. Keep the system in a heated space or an insulated garage.
FAQ
What is an expandable power station?
A portable power station with a port for add-on battery packs from the same brand. Packs add capacity (runtime) without replacing the station; the inverter, outlets and solar input stay the same. Examples include the Jackery Explorer 5000 Plus, Anker SOLIX F3800 Plus and Bluetti Apex 300.
Which power station has the most expansion capacity?
Among the models we stock, the Jackery Explorer 5000 Plus: 5,040 Wh base, up to five Battery Pack 5000 Plus units for 30.2 kWh per station, and 60 kWh with two linked stations. The Bluetti Apex 300 platform reaches 58 kWh with three units and 18 packs, and the Anker SOLIX F3800 Plus reaches 26.9 kWh per unit or 53.8 kWh with two.
What Bluetti power stations are expandable?
In our current stock, the Bluetti Apex 300 expands with B300K (2,765 Wh) and B500K (5,120 Wh) packs toward a 58 kWh platform limit, and the Elite 200 V2 accepts B80, B230 or B300 packs for up to about 5.1 kWh. Bluetti AC200L, AC200MAX, AC300 and AC500 also work with the B300K.
Does adding an expansion battery increase output watts?
No. Expansion batteries add watt-hours, not watts. An F3800 Plus with six BP3800 packs still delivers 6,000W. To raise output you link a second station, for example two F3800 Plus units for 12 kW or two Explorer 5000 Plus units.
Can I use another brand's battery with my power station?
No. Expansion ports and battery management are proprietary, so Jackery packs only work with compatible Jackery stations, Anker packs with Anker, and so on. Even within a brand, packs are model-specific: the Battery Pack 2000 Plus fits the Explorer 2000 Plus but not the HomePower 2000 Plus v2.
Is it cheaper to buy a bigger station or add packs later?
Adding packs usually costs $366-$552 per kWh, similar to or less than buying a bigger station, and lets you spread the cost. Buy the station for the output you need (120V vs 240V, watts) and add packs for runtime. Bundles such as the F3800 Plus + BP3800 can save several hundred dollars versus separate purchases.
How long do expansion batteries last?
They use LiFePO4 cells rated for about 3,000-6,000 cycles: 3,000 for the Anker BP3800, 4,000 for the Jackery Battery Pack 5000 Plus, Anker BP2000 Gen 2 and Bluetti B300K, and 6,000 for the Jackery Battery Pack 3600 Plus and 2000 Plus v2. At one cycle a day that is roughly 8-16 years.
Ready to build your system? Compare all home backup solar generators or read our ranking of the best solar generators for home backup.
Serhii Dovzhenko, Solar & Energy Storage Specialist at Eco Solar Kits · LinkedIn
Serhii is based in Vancouver, BC, and works on product data, system sizing and buyer guides for Eco Solar Kits. He attends solar and energy storage industry conferences and is involved in the community of electricians in Vancouver, BC. Credit for the data verification in this guide goes to Adsec.ca.