Solar generators have become indispensable for serious off‑grid use and home backup. High‑capacity lithium‑iron‑phosphate (LFP) batteries, expandable modular systems and rapid charging mean today’s models deliver grid‑level power without the fumes of a gas generator.
This update replaces older entries (Bluetti EP500 and Point Zero Energy Titan) with newer systems and rearranges the rankings based on output power, storage and versatility. Every model below uses LFP chemistry for long life and offers high‑wattage inverters suitable for whole‑home backup.
Quick comparison of the 2026 lineup
| Ranking/Specs | Battery Capacity | AC Inverter Output Max |
|---|---|---|
| #1 EcoFlow DELTA Pro 3 | 4,096Wh base, expandable to 48kWh | 4,000W (8,000W surge) with X‑Boost to 6,000W; 120/240V split‑phase |
| #2 Bluetti Apex 300 | 2,764.8Wh base, expandable to 58kWh | 3,840W (7,680W surge) dual‑voltage 120/240V |
| #3 Anker SOLIX F3800 Plus | 3,840Wh base, expandable to 26.9kWh | 6,000W (split‑phase 120/240V) |
| #4 EcoFlow DELTA Pro (original) | 3,600Wh base, expandable to 25kWh | 3,600W (7,200W surge) with X‑Boost to 4,500W |
| #5 OUPES Mega 3 | 3,072Wh base, expandable to 15.36kWh | 3,600W pure sine wave inverter (7,000W surge) |
1. EcoFlow DELTA Pro 3 – the new champion
Delta Pro 3
from: EcoFlow
EcoFlow’s third‑generation DELTA Pro is currently the most capable portable solar generator. It houses a 4,096Wh LFP battery and a 4,000W pure‑sine inverter that can surge to 8,000W and temporarily boost to 6,000W via X‑Boost. Dual‑battery terminals let you link up to 48kWh of storage, enough to back up a small home. The system supports both 120 V and 240 V output for split‑phase appliances.
Why it takes the top spot: A massive power reserve, rapid recharging and advanced safety features. The Pro 3 accepts up to 2,600W of solar, 4,000W from AC or EV chargers, and can switch between inputs seamlessly. The 10 ms uninterruptible‑power‑supply (UPS) keeps electronics running during outages. EcoFlow rates the LFP battery for 4,000 cycles to 80% capacity, and the IP65‑rated battery pack is dustproof and water‑resistant. A mobile app (Wi‑Fi, Bluetooth and CAN bus) provides remote monitoring and firmware updates.
Pros
- Most powerful portable inverter: 4 kW continuous with 8 kW surge and 6 kW X‑Boost allows heavy‑duty appliances.
- Versatile charging: 7+ charging methods, including AC, solar, car, gas generator, and EV charger; 0–80 % in ~50 minutes.
- Expandable and durable: Up to 48 kWh capacity, IP65‑rated battery with 4,000‑cycle LFP chemistry, 5‑year warranty.
- Quiet operation: EcoFlow’s X‑Quiet technology drops noise to ~30 dB at light loads.
Cons
- Heavy at ~113 lb, so it requires wheels and handles for portability.
- Pricey due to industrial‑grade components.
2. Bluetti Apex 300 – versatile high‑wattage performer
Apex 300
from: Bluetti
Bluetti’s Apex 300 replaces the older EP500 in our lineup and brings a rare combination of high output and efficient charging. Its 2,764.8Wh LFP battery feeds a 3,840W inverter with 7,680W surge capability, and the unit can operate at both 120V and 240V. Bluetti rates the battery for 6,000+ cycles to 80% capacity.
The Apex 300 accepts 2,400W of solar and 3,840W from AC or generators, and it can combine sources for faster charging. Multiple units can be linked for higher voltage or capacity, and additional battery packs allow you to build a large system. A built‑in UPS keeps loads powered when switching from the grid to the battery.
Pros
- High continuous output: 3,840W inverter with 7,680W surge handles power‑hungry tools and appliances.
- Flexible 120/240V operation and modular expandability via external batteries and multi‑unit linking.
- Fast solar and hybrid charging: 2,400W solar input plus AC/generator input for quick turnaround.
- Long‑life battery: LiFePO₄ cells rated for over 6,000 cycles to 80%.
Cons
- Heavy and bulky (over 90 lb) with separate expansion modules.
- Premium pricing and limited availability at the time of writing.
3. Anker SOLIX F3800 Plus – expandable split‑phase workhorse
F3800 Plus Portable Power Station
from: Anker SOLIX
Anker’s SOLIX F3800 Plus offers the highest inverter output on this list: 6,000W continuous with split‑phase 120/240V capability. A 3,840Wh LFP battery serves as the base, and up to six expansion batteries can push capacity to 26.9kWh. The heavy‑duty inverter includes a NEMA L14‑30R 30‑amp outlet and an RV‑ready TT‑30R plug, making it suitable for construction tools, RVs, and whole‑home backup.
Solar charging is robust—each PV input accepts 11–165V at 17A (about 1,600W per port, 3,200W total). AC charging via household outlets hits 1,800W; bypass charging allows powering loads while charging. Anker’s app provides remote monitoring, and the system uses EV‑grade LFP cells rated for 3,000+ cycles with a 5‑year warranty.
Pros
- Highest output here: 6kW continuous with split‑phase 240V operation; supports 12kW with dual units.
- Large capacity potential: base 3.84kWh expandable to 26.9kWh and beyond.
- Substantial solar input: up to 3,200W across two MPPT channels.
- RV/EV‑friendly: dedicated 30‑amp plugs and EV charging compatibility.
Cons
- Very heavy (136.7 lb) and unwieldy to move.
- Expansion batteries are costly, and full split‑phase output requires multiple units.
4. EcoFlow DELTA Pro (1st generation) – still a powerhouse
DELTA Pro Portable Power Station
from: EcoFlow
The original EcoFlow DELTA Pro remains a strong contender. Its 3,600Wh LFP battery powers a 3,600W inverter with 7,200W surge, and X‑Boost allows certain loads up to 4,500W. The unit accepts up to 1,600W of solar (11–150V, 15A) and up to 1,800W from standard 120V outlets or 3,000W at 240V. EcoFlow rates the battery for 3,500 cycles to 80 %, and optional expansion batteries boost capacity to 10.8kWh.
Although the DELTA Pro doesn’t match the Pro 3’s raw power, its proven reliability, flexible charging and ecosystem of accessories (smart panels, transfer switches and smart home app) make it a versatile choice. The weight (~99 lb) is manageable thanks to integrated wheels and telescopic handle.
Pros
- Robust power: 3.6kW continuous, 7.2kW surge and 4.5kW X‑Boost.
- Expandable: supports up to two extra batteries plus a smart generator for 10.8kWh total.
- Fast charging: 1,600W solar plus 1,800/3,000W AC input; dual charging methods combine to reduce downtime.
- Mature ecosystem with home integration accessories and reliable app.
Cons
- Lower capacity and output than newer models.
- Heavy (99 lb) and still costly, though prices have decreased as newer models launch.
5. OUPES Mega 3 – budget‑friendly expansion option
Mega 3 + 240W Solar Panel*4
from: OUPES
OUPES’ Mega 3 offers a compelling mix of power and value. Its 3,072Wh LFP battery feeds a 3,600W pure‑sine inverter that surges to 7,000W. The battery supports >3,500 cycles to 80 % capacity, and you can expand storage to 15.36kWh via up to six B2 modules.
Charging options are flexible: fast AC charging at 1,800W, slow AC at 900W, solar input up to 2,100W, and combined AC + solar up to 3,900W. The Mega 3 also includes a <20 ms UPS/EPS rated at 2,200W, so it can serve as a seamless backup during outages. Despite its power, it weighs 83.3 lb—lighter than many competitors—and has integrated Wi‑Fi/Bluetooth for app control.
Pros
- Good performance for the price: 3.6kW inverter, 3.1kWh LFP battery and expansion up to 15.36kWh.
- Flexible charging: 1,800W AC, 2,100W solar and up to 3,900W hybrid input.
- Seamless UPS/EPS (<20 ms) with 2,200W pass‑through.
- Lightweight for its class (83.3 lb) and 5+1‑year warranty.
Cons
- No output scaling: extra batteries increase capacity but not inverter power.
- Lower surge tolerance in real‑world testing than advertised and fewer ports than some competitors.
Final thoughts
The solar‑generator market is evolving quickly. EcoFlow’s DELTA Pro 3 stands out for raw output and extreme expandability, while Bluetti’s Apex 300 offers a high‑wattage alternative with faster charging. Anker’s SOLIX F3800 Plus caters to users needing a 6kW inverter and RV‑friendly outlets, whereas the original DELTA Pro remains a solid workhorse. For those seeking a more affordable unit with future upgrade paths, the OUPES Mega 3 is a strong choice. Consider your required power, capacity and budget when choosing among these impressive systems.