Anker’s BP2000 Expansion Battery (Gen 2) adds 2,048Wh of LiFePO4 storage to the SOLIX C2000 Gen 2, doubling the power station’s capacity to 4,096Wh through a single cable. Anker’s US product page lists the pack at 51.2V and 40Ah, rated for 4,000 cycles to 80% capacity with a five-year warranty, and notes one important limit up front: it is not compatible with the older SOLIX F2000.
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This guide covers what the BP2000 actually is, how it connects, how much runtime it adds, and the details to check before you buy one. Specs come from Anker’s datasheet and product pages. Runtime figures are worked estimates and are labelled as such.
What the BP2000 is, and what it is not
The BP2000 is a battery with no outlets. There are no AC sockets, USB ports or solar input on the pack itself. Anker Japan’s listing spells this out: the pack cannot be used on its own and can only be charged through a connected C2000 Gen 2. Think of it as a second fuel tank that plugs into the power station, which still does all of the inverting, charging and port management.
Compatibility
- Designed for: Anker SOLIX C2000 Gen 2 (Anker’s US page calls the pack “exclusively designed” for it).
- Also listed by some retailers: C2000 Gen 2 variants and the F3000. Check Anker’s current compatibility list for your exact model before ordering.
- Not compatible: SOLIX F2000, per Anker.
The name matters here. Anker has used similar battery names across generations, so match the battery to the power station model rather than the “BP2000” label alone.
BP2000 Gen 2 specifications
| Spec | Anker SOLIX BP2000 (Gen 2) |
|---|---|
| Capacity | 2,048Wh (51.2V, 40,000mAh) |
| Chemistry | LiFePO4 (LFP) |
| Voltage range | 40–58.4V |
| Expansion-port charging current | 58A max |
| Expansion-port discharging current | 77A max |
| Cycle life | 4,000 cycles to 80% |
| Charging temperature | 32–104°F (0–40°C) |
| Discharging temperature | -4–104°F (-20–40°C) |
| Weight | 15.3 kg (about 33.7 lb) |
| Dimensions | 395.5 × 197.5 × 229 mm (about 15.6 × 7.8 × 9 in) |
| Warranty | 5 years |
| In the box | Battery, battery-to-host cable, manual |
Source: Anker SOLIX BP2000 (Gen 2) datasheet and Anker SOLIX US product page.
The C2000 Gen 2 it plugs into
Because the power station does the work, its numbers set the limits for the pair. According to Anker’s spec sheet, the C2000 Gen 2 itself holds 2,048Wh and delivers 2,400W continuous AC with 4,000W peak. It has a NEMA 5-20R outlet and a TT-30R RV outlet, each rated at 120V and 20A, two 140W USB-C ports, a 15W USB-C, a 12W USB-A and a 12V/10A car socket. It weighs 18.9 kg (41.7 lb) and has a 10 ms UPS switchover.
| Charging method (C2000 Gen 2) | Max input | Anker’s stated time |
|---|---|---|
| AC + solar | 2,600W | 100% in 58 min |
| AC wall | 1,800W | 100% in 88 min |
| Solar (XT-60i, 11–60V, 17A) | 800W | 100% in 3 hr |
| Alternator charger | 800W | 100% in 3 hr |
| Gas generator | 1,800W | 100% in 88 min |
| Car socket | 100W | 100% in 23 hr |
Anker notes these times are from its internal testing and refer to the power station alone. Adding a BP2000 means twice the energy to replace, so plan on roughly double the time at the same input (estimate).
How to connect the BP2000, step by step
- Update first. Install the Anker app, pair the C2000 Gen 2 and apply any firmware update before adding the battery.
- Power down. Turn off the power station and disconnect loads and chargers.
- Place both units on a flat, dry surface. The pack weighs 15.3 kg, so lift with the integrated handles.
- Connect the battery-to-host cable from the BP2000 to the expansion battery port on the back of the C2000 Gen 2. Push it fully home and lock it.
- Switch on the BP2000 with its power button, then the power station. The screen and app should show the combined capacity.
- Check the app. Confirm the battery is recognized and its charge level appears.
Always follow the sequence in Anker’s printed manual if it differs from the outline above. Retail listings that quote the manual say the expansion battery discharges before the power station’s internal pack, and the power station charges first before topping up the expansion battery.
How much runtime does 4,096Wh buy?
To estimate runtime, multiply capacity by an efficiency factor for inverter losses and divide by the load. The examples below assume 85%, which is a common planning figure for AC loads on a power station. They are estimates, not test results.
| Load (average draw) | C2000 Gen 2 alone (2,048Wh) | With BP2000 (4,096Wh) |
|---|---|---|
| Full-size fridge, about 60W average | ~29 hours | ~58 hours |
| CPAP without humidifier, about 40W | ~43 hours | ~87 hours |
| Starlink Standard, about 75W | ~23 hours | ~46 hours |
| Laptop and monitor, about 120W | ~14.5 hours | ~29 hours |
| Window AC, about 500W running | ~3.5 hours | ~7 hours |
Run the math with your own numbers: Wh × 0.85 ÷ watts = hours. A plug-in watt meter gives a better average draw than a nameplate, because fridges and AC units cycle on and off.
Worked example: an outage weekend (estimate)
Say you need a fridge (60W average), a router and modem (15W), phone charging (10W) and LED lights for five hours a night (20W, or about 100Wh a day). That is roughly 2,140Wh per day before losses, or about 2,520Wh after a 15% allowance. The C2000 Gen 2 alone covers most of one day. Paired with the BP2000, 4,096Wh × 0.85 ≈ 3,480Wh usable stretches past a day and a third. Add 800W of solar and, on a clear day yielding around four hours of strong sun, you could put back roughly 2,000–3,000Wh (estimate), which can keep the cycle going indefinitely in summer.
BP2000 versus buying a second power station
A second C2000 Gen 2 would also add 2,048Wh, plus its own outlets and inverter. The BP2000 makes sense when you want one control point, one app and one set of outlets, and when the C2000’s 2,400W output is enough. A second station makes sense if you need two separate power points, such as one in the garage and one inside. The expansion pack is also lighter than a second station, at 15.3 kg against 18.9 kg.
Tips for living with an expansion battery
- Storage: Anker Japan warns against storing the pack at 1% or below. Top it up within a few days if it runs flat.
- Heat: keep it out of hot car trunks and direct sun. The charging range stops at 104°F.
- Cold: it discharges down to -4°F but will not charge below 32°F.
- Modes: the C2000 Gen 2 supports Standard, Time-of-Use, Storm Guard and Fast Charging Plan modes, per Anker. Storm Guard holds a reserve ahead of outages, which is when the extra 2kWh pays off.
- Cable: use only the included battery-to-host cable.
Where to buy
Anker sells the BP2000 Expansion Battery (Gen 2) on its US store, alone or bundled with the C2000 Gen 2.
Related reading
FAQ
What does the Anker SOLIX BP2000 work with?
Anker designed the Gen 2 pack for the SOLIX C2000 Gen 2. It is not compatible with the SOLIX F2000. Some retailers also list the F3000, so confirm with Anker for your model.
Can I use the BP2000 on its own?
No. It has no outlets and charges only through a connected power station.
How much capacity does it add?
2,048Wh. With a C2000 Gen 2, the total is 4,096Wh.
How heavy is it?
15.3 kg, or about 33.7 lb, per Anker’s datasheet.
Does it increase output power?
No. Output is set by the power station. The C2000 Gen 2 stays at 2,400W continuous and 4,000W peak. The BP2000 only extends how long it can run.
What warranty does it have?
Five years, according to Anker’s US page.