If you’re considering a high-capacity, modular solar generator for home backup or off-grid living, the BLUETTI AC500 + B300S combo stands out as one of the most powerful and versatile options on the market.
Based on product specifications, user feedback, and BLUETTI’s reputation for innovative design, this guide breaks down everything you need to know about the AC500 + B300S system — from battery specs and charging speed to portability and ideal use cases.
- [Upgraded and Supercharged] – An AC500 with a 5,000W inverter accepts up to 6 B300K expansion batteries, boosting its capacity to Max. 16,588.8Wh, enough to get through a severe power outage.
- [16 Versatile Ports] – The NEMA 14-50R, TT-30, and L14-30 ports are perfect for heavy-duty appliances. Just plug in what you want to charge, and AC500 will do the rest for you.
- [How to Connect AC500 with B300K] – The package includes a P090D to P150D cable, which is required to connect the AC500 to the B300K. Please note that this cable is shipped separately.
Product Specifications
| Feature | Specification |
|---|---|
| Battery Capacity | 3,072Wh per B300S (expandable up to 18,432Wh) |
| Inverter Power | 5,000W pure sine wave (10,000W surge) |
| Battery Type | LiFePO4 (3,500+ cycles to 80%) |
| Weight | AC500: 66.2 lbs, B300S: 83.8 lbs |
| Charging Methods | AC, Solar (max 3,000W input), Car, Generator, Dual Input |
| Expandability | Up to 6 × B300S modules |
| AC Outlets | 6 × 120V (20A), 1 × 120V/240V (30A L14-30) |
| Solar Input Voltage | 150V–500V / 15A (MPPT) |
| Connectivity | App Control via Wi-Fi/Bluetooth |
Performance
The BLUETTI AC500 inverter delivers an impressive 5,000W of continuous power with a 10,000W surge capacity, making it capable of handling nearly any household or RV appliance — from refrigerators and well pumps to power tools and induction cooktops.
- Supports split-phase 240V output with 30A L14-30 port
- Ideal for running high-load devices without overload trips
- Fast switchover (<20ms) in UPS mode for seamless home backup
Battery & Specs
The B300S battery module provides 3,072Wh of storage with long-lasting LiFePO4 chemistry. You can connect up to 6 battery packs for a max capacity of 18,432Wh, giving days of autonomy for essential appliances during grid outages.
- 3,500+ charge cycles = ~10 years of daily use
- Internal self-heating for winter reliability
- Can function as a standalone power bank with its own outlets
Portability & Design
BLUETTI AC500 + B300S / Home Battery Backup
from: BLUETTI US
While the AC500 and B300S are heavy (combined ~150 lbs), their stackable, wheeled design makes them easier to maneuver than traditional gas generators or lead-acid setups.
The modular architecture also allows for flexible deployment:
- Stack and connect only what you need
- Separate units for easier transport and storage
- Rugged, reinforced casing with integrated handles
Charging Options
BLUETTI offers versatile and high-speed charging options with this system:
- AC Input: Up to 4,500W with dual charging (requires additional adapter)
- Solar Input: Up to 3,000W via MPPT with wide voltage range (150–500V)
- Dual Input: Combine solar + AC for ultra-fast recharge times
- Other: Car outlet and generator compatibility for emergencies
A full recharge (one B300S battery) can take as little as 1.5–2 hours with AC + solar input combined.
Price & Value
As of 2025, the BLUETTI AC500 + B300S bundle typically retails around $4,999–$5,499, depending on promotions. While that’s a significant investment, its:
- Expandability
- Power output
- Off-grid readiness
- Long lifespan
…make it a high-value option for those seeking a gas-free home backup or off-grid living solution.
[Link to: Best Solar Generators Guide]
Ideal Use Cases
The AC500 + B300S excels in scenarios where power reliability and capacity are critical:
✅ Home Backup
- Whole-home or partial home support (with transfer switch)
- Quiet, zero-emission alternative to gas generators
✅ Off-Grid Living
- Solar-first design for energy independence
- Supports fridges, freezers, water pumps, heaters
✅ RVs & Trailers
- 240V power for AC units and induction cooktops
- Compact enough to store in large RV compartments
✅ Emergency Preparedness
- Self-heating battery keeps it winter-ready
- Long shelf life and standby mode
Pros and Cons
Pros
- Massive power and expandability
- 240V output for heavy-duty appliances
- Fast, flexible charging options
- LiFePO4 battery = long lifespan and safety
- Excellent app-based monitoring and control
Cons
- Heavy and bulky — not for casual portability
- High upfront cost
- Requires technical understanding for optimal setup
Final Verdict
The BLUETTI AC500 + B300S is one of the most advanced and powerful solar generator systems available today. It’s not designed for lightweight camping or casual weekend use — it’s built for those who need serious backup power, want to live off-grid, or want to ditch noisy, polluting gas generators for good.
If you’re ready to invest in a future-proof, solar-ready power system, this setup offers flexibility, performance, and durability that few competitors can match.
Related: Bluetti EP500 vs AC500: Solar Generator Comparison Guide
FAQs
Can the AC500 run 240V appliances like a well pump or dryer?
Yes — the AC500 includes a 30A 120V/240V split-phase output (L14-30), ideal for heavy-duty home appliances or tools.
How many solar panels do I need to charge it?
For max input (3,000W), use at least 6–8 × 400W panels in series. BLUETTI recommends a solar array with a voltage between 150V and 500V.
Can I use the B300S without the AC500?
Yes — the B300S has its own DC output ports and can function as a standalone power bank for smaller devices.
Is it worth the price over smaller solar generators?
If you need true whole-home backup or full off-grid capabilities, the AC500 + B300S offers unmatched power and longevity compared to smaller units.
Last update on 2025-05-12 / Affiliate links / Images from Amazon Product Advertising API