BLUETTI AC300 + B300
Bluetti Apex 300:
The AC300's
Worthy Successor
2,764.8Wh built-in LFP battery, 3,840W output (7,680W surge), standalone 120V/240V, 18W idle draw, 6,000+ cycle lifespan — everything the AC300 should have been, in one box.
product photo
What Is the Bluetti Apex 300?
The Apex 300 is Bluetti's direct successor to the AC300 — and the upgrades are generational, not incremental. Where the AC300 was an empty inverter box that required an external B300 battery module just to function, the Apex 300 ships with 2,764.8Wh of built-in LFP capacity. You can use it the moment it arrives, straight from the box. No external battery required.
Output jumped from 3,000W to 3,840W continuous (7,680W surge). The idle power draw dropped from a notorious ~50W to just 18–20W. And a single unit now delivers both 120V and 240V simultaneously — something the AC300 required two units, two batteries, and a Fusion Box to achieve.
Bluetti didn't just refresh the AC300's looks — they redesigned what the product fundamentally is. Here's what changed:
🔋 Built-In Battery
⚡ Standalone 240V
💤 Fixed Idle Draw
🔄 Longer Lifespan
What We Love
- 2,764.8Wh built-in LFP — works straight out of the box
- 3,840W continuous output (7,680W surge)
- Standalone 120V + 240V — no Fusion Box needed
- NEMA 14-50 outlet for EV charging and large appliances
- 18–20W idle draw — dramatically improved over AC300
- 6,000+ cycle lifespan on 2nd-gen LFP cells
- Expandable with additional B300K batteries
- Strong solar input (up to 2,400W)
The Trade-offs
- Heavy — 88 lbs with built-in battery
- Premium price point
- No certified UPS mode (EPS switchover only)
- App connectivity can be finicky on first setup
- 240V limited to 30A circuits — not split-phase for whole-home
💡 If You're Coming from the AC300
The Apex 300 is not a minor refresh — it's a different product category. You no longer need a separate battery module, a Fusion Box for 240V, or to budget around a ~50W idle tax on your capacity. For anyone building a new system, the Apex 300 bundle on Amazon is the smarter buy by a significant margin.
Where to Buy
Highly Recommended| Feature | Bluetti Apex 300 | Bluetti AC300 (old) |
|---|---|---|
| Built-In Battery | ✅ 2,764.8Wh LFP included | ❌ No internal battery — external module required |
| AC Output (Continuous) | 3,840W | 3,000W |
| Surge | 7,680W | 6,000W |
| 240V Output | ✅ Standalone — NEMA 14-50 + 30A built in | ❌ Required 2× AC300 + 2× B300 + Fusion Box |
| Idle Draw | ~18–20W | ~50W (major complaint) |
| LFP Cycle Life | 6,000+ cycles to 80% | ~3,500 cycles to 80% |
| Solar Input | Up to 2,400W | Up to 2,400W |
| Expandable | Yes — B300K add-on batteries | Yes — B300 modules |
| Weight | ~88 lbs (with built-in battery) | ~30 lbs (head unit only, no battery) |
Bottom Line on the Comparison
The AC300 required purchasing and connecting a separate B300 battery module before it could do anything. The Apex 300 arrives ready to run. For new buyers, the Apex 300 is categorically the better product. For existing AC300 owners who already have B300 modules, the decision is more nuanced — but the idle draw fix and 240V standalone capability alone make the Apex 300 worth serious consideration.
| Specification | Bluetti Apex 300 |
|---|---|
| Built-In Capacity | 2,764.8Wh (LFP, 2nd-gen cells) |
| Battery Chemistry | LiFePO₄ (LFP) — 2nd generation |
| Cycle Life | 6,000+ cycles to 80% capacity |
| AC Output (Continuous) | 3,840W |
| AC Output (Surge) | 7,680W |
| 120V Outlets | Multiple NEMA 5-20 outlets |
| 240V Outlets | NEMA 14-50 (50A) + 30A plug — standalone, no Fusion Box |
| Max Solar Input | 2,400W |
| Idle Draw | ~18–20W |
| Expandable | Yes — B300K expansion batteries |
| Weight | ~88 lbs (with built-in battery) |
| App Control | Bluetooth + Wi-Fi (iOS and Android) |
⚠️ 240V Clarification
The Apex 300's 240V output runs heavy appliances (EV chargers, well pumps, dryers on dedicated circuits) but is not true split-phase for whole-home transfer switch setups. Verify your specific 240V requirements before purchasing.
What 3,840W Gets You
With 3,840W continuous and a 7,680W surge, the Apex 300 handles loads that stop most portable power stations cold:
- ✅ Well pump (120V, 2,000–2,500W startup surge)
- ✅ Window AC (1,500–2,000W)
- ✅ Refrigerator + chest freezer simultaneously
- ✅ Microwave + coffee maker + lights at the same time
- ✅ Power tools — circular saw, miter saw, air compressor
- ✅ Electric vehicle charging via NEMA 14-50 (Level 2)
- ✅ Electric dryer on a dedicated 240V circuit
The 240V Difference
This is the Apex 300's biggest practical advantage over the AC300. A single unit powers a NEMA 14-50 outlet — the standard EV charging outlet found in most homes. Previously, getting 240V from a Bluetti system meant buying two AC300 units, two B300 batteries, and a Fusion Box to link them. The Apex 300 does it alone.
Idle Draw in Practice
At 18–20W idle, the Apex 300 draws about 432–480Wh per day just staying on — roughly 16–17% of its built-in capacity in 24 hours. This is dramatically better than the AC300's ~50W idle (~1,200Wh/day). For overnight backup setups where the inverter stays active, this difference is material.
🏠 Serious Home Backup
3,840W output and 240V capability cover nearly every household load short of central AC.
🔌 EV Owners
The NEMA 14-50 outlet provides Level 2 EV charging from a single portable power station.
🌞 Off-Grid Cabins
2,400W solar input and expandable capacity make this a complete off-grid power system.
🔧 Heavy Appliance Users
Well pumps, dryers, and power tools that need 240V circuits are now within reach.
📦 AC300 Upgraders
The idle fix and standalone 240V make the Apex 300 a compelling reason to upgrade.
❌ Light Everyday Use
If you're charging phones and running a laptop, the Apex 300 is overkill. Look at the AC180 or EcoFlow Delta 2.
What Bluetti Got Right
Every major AC300 complaint has been addressed. Built-in battery eliminates the "empty box" problem. Standalone 240V eliminates the Fusion Box requirement. The idle draw fix eliminates the passive capacity drain. Higher output and longer-lived cells round out a genuinely generational upgrade.
The Honest Trade-offs
At ~88 lbs with the integrated battery, this is not a unit you move frequently. The premium price reflects what it can do, but it's a significant investment. And like all Bluetti stations, the EPS switchover (not a certified UPS) means it's not ideal for mission-critical electronics without additional protection.
The Verdict
For buyers who need serious home backup with 240V capability — or who want to run an EV charger from a portable power station — the Apex 300 stands alone. There's nothing else in this class that delivers standalone 240V, 3,840W output, and 6,000+ cycle LFP in a single portable unit. Highly Recommended.
