EcoFlow Portable Power & Solar Solutions

Power Without Limits.
Energy Anywhere.

Welcome to castelow — your trusted shop for EcoFlow power solutions. From portable power stations and solar generators to foldable solar panels and smart home backup systems: every product is selected to keep you reliably powered at home, on the road, and off the grid.

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EcoFlow Power Solutions
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EcoFlow DELTA 2 Max + 500W Alternator Charger
EcoFlow DELTA 2 Max + 500W Alternator Charger
$874.30 Save $-874.30
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EcoFlow DELTA 2 Max Smart Extra Battery

$629.30 Save $-629.30
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· Expandable capacity - Increase the capacity of DELTA 2, DELTA Max and DELTA 2 Max with an extra 2048Wh.
· Triple power at up to 30% lower cost - 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to gain a capacity of 6144Wh. And it's up to 30% more affordable than a power station of the same capacity.
· 10-year lifespan with an LFP battery - Get 10 years of daily use until it hits 80% of its original capacity. Embrace the 3000+ charging cycles enabled by the LFP battery chemistry.
· Easy to use - Plug-and-play without setup. And use the EcoFlow app to monitor and control the DELTA 2 Max Smart Extra Battery.
· 5-Year Full Warranty - With one of the most comprehensive warranties in the industry, we go the extra mile to give you peace of mind.

EcoFlow STREAM Ultra

$979.30 Save $-979.30
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Note:
Plug-in Solar installation of this product is currently permitted in Utah,Maryland and Colorado.
More states are legalizing plug-in solar — check your local regulations before purchasing.

- Plug-and-play Installation
- 4 MPPT, Max. 2000W Solar Input
- Max.1200W On-Grid AC Output¹
- All-in-One Design with a built-in grid-tied microinverter
- 10-Year Warranty
- NEMA 4 Water-resistant Rating
- LFP Battery,6000 Cycles to 70%
- AI-Powered Smart Energy System
- 10-year warranty

EcoFlow DELTA 3 Plus Portable Power Station

$468.30 Save $-468.30
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1–5kWh expandable with DELTA 3 Extra Battery, DELTA 2 Extra Battery, DELTA 2 Max Extra Battery, or DELTA Pro 3 Extra Battery via an Alternator Charger XT150 Output Cable.

•1800W AC output, 2200W (surge 3600W) with X-Boost 

•5 fast recharging methods (AC, Solar, 800W Alternator Charger, Smart Generator 3000 (Dual Fuel), Multicharging)

•5-year warranty

EcoFlow DELTA 2 Max Smart Extra Battery (Refurbished)

$419.30 Save $-419.30
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Shipping calculated at checkout.
· Expandable capacity - Increase the capacity of DELTA 2, DELTA Max and DELTA 2 Max with an extra 2048Wh.
· Triple power at up to 30% lower cost - 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to gain a capacity of 6144Wh. And it's up to 30% more affordable than a power station of the same capacity.
· 10-year lifespan with an LFP battery - Get 10 years of daily use until it hits 80% of its original capacity. Embrace the 3000+ charging cycles enabled by the LFP battery chemistry.
· Easy to use - Plug-and-play without setup. And use the EcoFlow app to monitor and control the DELTA 2 Max Smart Extra Battery.
· 5-Year Full Warranty - With one of the most comprehensive warranties in the industry, we go the extra mile to give you peace of mind.

EcoFlow Smart Home Panel 3 (Recommended Accessory)

$2,309.30 Save $-2,309.30
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Shipping calculated at checkout.
  • Command home power center with 32 smart circuits
  • Seamless Backup in <20 ms
  • Smarter Savings up to $6,000/year 
  • Extend Backup time by up to 42%
*Note: Smart Home Panel 3 requires installation before use, and the specific fee will depend on the assessment

EcoFlow Smart Inlet Box (Smart Home Panel 2 Upgrade）

$349.30 Save $-349.30
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Shipping calculated at checkout.
· Delivers up to 150A total load through 3 × 50A interfaces.
· Supports bidirectional power input and output, switch between grid, battery, and generator power.
· Pairs with the EcoFlow Smart Home Panel 3 for whole-home backup.
· Enables real-time control and smarter energy management.

EcoFlow DELTA Pro Ultra X Inverter

$2,659.30 Save $-2,659.30
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·12kW-36kW output with up to 3 inverters
·10kW-30W solar input with up to 3 inverters
·Online UPS, 10-ms transfer time
·Prolonged lifespan with a proprietary cooling structure
·End-to-End System Protection, Industry’s Highest Safety Certification

EcoFlow DELTA Pro Smart Extra Battery

$839.30 Save $-839.30
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Shipping calculated at checkout.
Limited inventory available. The DELTA Pro Smart Extra Battery will not be restocked.
· Expandable capacity - Increase the capacity of DELTA Pro with an extra 3600Wh.
· Triple power at up to 30% lower cost - 3-10kWh expandable capacity to fit your energy storage needs. Add up to two DELTA Pro Extra Batteries to gain a capacity of 10.8kWh. And it's up to 30% more affordable than a power station of the same capacity.
· 10-year lifespan with an LFP battery - Get 10 years of daily use until it hits 80% of its original capacity. Embrace the 3000+ charging cycles enabled by the LFP battery chemistry.
· Easy to use - Plug-and-play without setup. And use the EcoFlow app to monitor and control the DELTA Pro Extra Battery.
· 5-Year Full Warranty - With one of the most comprehensive warranties in the industry, we go the extra mile to give you peace of mind.

EcoFlow GLACIER Portable Refrigerator (Refurbished)

$447.30 Save $-447.30
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• Industry's first integrated ice maker
• Dual zone, dual control
• The fastest cooling in the industry
• Wire-free cooling for up to 40 hours
• 38L large capacity
• Detachable suitcase design
• Smart app control
* GLACIER's accessories (Plug-in Battery and Detachable Wheels and Lever) are sold separately.
* GLACIER and its accessories (Plug-in Battery and Detachable Wheels and Lever) are shipped separately. Please note that you will receive at least 2 packages and 2 tracking numbers.

EcoFlow HeatGuard Solar Film

$321.30 Save $-321.30
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Shipping calculated at checkout.
  • Over 10°C/50℉ Heat Insulation with Air Gap Technology
  • 25% Solar Efficient N-Type TOPCon Cells
  • Custom-designed for Each Tesla Model
  • Integrated Design with Your Vehicle
  • IP68 Waterproof
  • Damage-Free Installation and Removal with Premium 3M™ Double-sided Tape
*This product is designed to charge portable power stations only. It does not support direct vehicle charging

EcoFlow WAVE 2 Portable Air Conditioner with Heater

$419.30 Save $-419.30
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Shipping calculated at checkout.
*For optimal use, a compatible battery may be required and should be purchased separately.

WAVE 2
• 5-minute warmth in any compact space.
• Fastest Cooling and Heating
• Installation-free! Fits Anywhere
• 8 Long Hours of Comfort (With Add-on Battery)
• 44dB: Perfect For Quiet Sleep
• Using R290: A Greener Way to Beat the Heat
• 4 Ways to Charge

EcoFlow Smart Generator 4000 (Dual Fuel)

$881.30 Save $-881.30
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Shipping calculated at checkout.
Due to local regulations, this product is NOT CARB-approved. Cannot be shipped to California.
- Dual Fuel with LPG & gasoline
- 3200W DC Output
- 40% Higher Energy Efficiency
- 4 Modes of Self-starting
- App Control and Monitor
- 5 Safety Alerts
- Ergonomically Portable Design
- LCD HD Screen

EcoFlow DELTA Pro 3 Solar Generator (PV400W)

$2,169.30 Save $-2,169.30
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Shipping calculated at checkout.
Solar Input - 2600W solar input with 2 PV ports for both high volt and low volt options.
Conversion Efficiency - High conversion efficiency rating ensures faster solar charging.
AC Output - Huge AC output for all your power needs.
Energy Capture - 99% MPPT efficiency to maximize solar generation anytime.
Energy Management - Customized in-app energy management to prioritize solar or AC charging, view input/output power, battery levels, and more.

EcoFlow DELTA 3 Max Plus Portable Power Station (2048Wh)

$804.30 Save $-804.30
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Shipping calculated at checkout.
DELTA 3 Max Plus (2048Wh)
  • 3000W Powerful Output: 6000W surge output. With X-Boost™ mode, supports heavy-duty appliances up to 3800W such as refrigerators, coffee makers, washers, and circular saws.
  • 5 Ways to Charge, Ready in Just 43 Mins: Ready in Just 43 mins (0-80%) with generator charging.
  • 2-10kWh Expandable Capacity:Easily scale up, and can achieve longer runtime with an EcoFlow Smart Generator featuring automatic start and stop.
  • Smart Output Priority: Choose which circuits stay powered via the app. Prioritize what matters and extend runtime when it counts most.
  • Adapter is required to connect the 800W Alternator Charger with DELTA 3 Max Plus.

Common Features
  • Long-Lasting, Durable, and Reliable:Equipped with automotive-grade full-tab LFP cells, offering 10 years of reliable power, 24/7 protection BMS, and EV-grade CTC structure that protects against overnight condensation and off-road bumps during transport.
  • 10ms Auto-Switch: Fast enough to keep critical devices like NAS systems and servers running smoothly.
  • 25dB Whisper-Quiet Operation: Ultra-low noise (≤25dB at 600W).
  • OASIS 3.0 Smart App Control: Dashboard to monitor real-time battery status, electricity prices, and savings. Storm Guard Mode automatically activates backup power before extreme weather hits. Self-Powered Mode and Scheduled Tasks save you money daily.
  • Up to 5-Year Warranty: Includes 3-year standard warranty and 2-year extended warranty available upon EcoFlow App registration.

EcoFlow DELTA 3 Max Portable Power Station (2048Wh)

$615.30 Save $-615.30
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Shipping calculated at checkout.
DELTA 3 Max (2048Wh)
  • 2400W Powerful Output: 4800W surge output. With X-Boost™ mode, it supports heavy-duty appliances up to 3400W such as refrigerators, coffee makers, washers, and circular saws.
  • 4 Ways to Charge, Ready in Just 68 Mins: Ready in 68 mins (0-80%) with Wall Charging or Generator Charging.
  •  Lightweight and Easy to Carry: Weighing just 20.3 kg, 13% lighter than the previous generation 2kWh product.

Common Features
  • Long-Lasting, Durable, and Reliable:Equipped with automotive-grade full-tab LFP cells, offering 10 years of reliable power, 24/7 protection BMS, and EV-grade CTC structure that protects against overnight condensation and off-road bumps during transport.
  • 10ms Auto-Switch: Fast enough to keep critical devices like NAS systems and servers running smoothly.
  • 25dB Whisper-Quiet Operation: Ultra-low noise (≤25dB at 600W).
  • OASIS 3.0 Smart App Control: Dashboard to monitor real-time battery status, electricity prices, and savings. Storm Guard Mode automatically activates backup power before extreme weather hits. Self-Powered Mode and Scheduled Tasks save you money daily.
  • Up to 5-Year Warranty: Includes 3-year standard warranty and 2-year extended warranty available upon EcoFlow App registration.

EcoFlow DELTA 3 Max Portable Power Station (2048Wh) - Flash Sale

$524.30 Save $-524.30
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Shipping calculated at checkout.
DELTA 3 Max (2048Wh)
1. 2400W Powerful Output: 4800W surge output. With X-Boost™ mode, it supports heavy-duty appliances up to 3400W such as refrigerators, coffee makers, washers, and circular saws.
2. 4 Ways to Charge, Ready in Just 68 Mins: Ready in 68 mins (0-80%) with Wall Charging or Generator Charging.
3. Lightweight and Easy to Carry: Weighing just 20.3 kg, 13% lighter than the previous generation 2kWh product.

Common Features
1. Long-Lasting, Durable, and Reliable: Equipped with automotive-grade full-tab LFP cells, offering 10 years of reliable power, 24/7 protection BMS, and EV-grade CTC structure that protects against overnight condensation and off-road bumps during transport.
2. 10ms Auto-Switch: Fast enough to keep critical devices like NAS systems and servers running smoothly.
3. 25dB Whisper-Quiet Operation: Ultra-low noise (≤25dB at 600W).
4. OASIS 3.0 Smart App Control: Dashboard to monitor real-time battery status, electricity prices, and savings. Storm Guard Mode automatically activates backup power before extreme weather hits. Self-Powered Mode and Scheduled Tasks save you money daily.
5. Up to 5-Year Warranty: Includes 3-year standard warranty and 2-year extended warranty available upon EcoFlow App registration.

EcoFlow Smart Generator - Subscriber Exclusive

$482.30 Save $-482.30
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Shipping calculated at checkout.

EcoFlow DELTA 3 Ultra Portable Power Station (3072Wh) (Refurbished)

$769.30 Save $-769.30
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Shipping calculated at checkout.
1. 4 Ways to Charge, Ready in Just 89 mins: Ready in Just 89 mins (0-80%) with wall charging or generator charging, and can achieve longer runtime with an EcoFlow Smart Generator.
2. 3600W Powerful Output: 7200W surge output. With X-Boost™ mode, supports heavy-duty appliances up to 4600W such as clothing steamers, electric dryers, lawnmowers, and electric frying pans.
3. Long-Lasting, Durable, and Reliable: Equipped with automotive-grade full-tab LFP cells, offering 10 years of reliable power, 24/7 protection BMS, Class-B certification, and EV-grade CTC structure that protects against overnight condensation and off-road bumps during transport.
4. 2 Easy Ways to Connect to Your Home: Manual Transfer Switch and Inlet Box.
5. 10ms Auto-Switch: keep critical devices like NAS systems and servers running smoothly.
6. 25dB Whisper-Quiet Operation: Ultra-low noise (≤25dB at 600W).
7. OASIS 3.0 Smart App Control: Dashboard to monitor real-time battery status, electricity prices, and savings. Storm Guard Mode automatically activates backup power before extreme weather hits. Self-Powered Mode and Scheduled Tasks save you money daily.
8. Up to 5-Year Warranty: Includes 3-year standard warranty and 2-year extended warranty available upon EcoFlow App registration.

EcoFlow DELTA 3 Ultra Plus Portable Power Station (3072Wh) (Refurbished)

$1,049.30 Save $-1,049.30
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Shipping calculated at checkout.
DELTA 3 Ultra Plus (3072Wh)
1. Smart Output Priority: Choose which circuits stay powered via the app. Prioritize what matters and extend runtime when it counts most.
2. 3-11kWh Expandable Capacity: Easily scale up, and can achieve longer runtime with an EcoFlow Smart Generator featuring automatic start and stop.
3. 6 Ways to charge, Ready in Just 48 Mins: Ready in Just 48 Mins (0-80%) with Solar + Generator Dual Charging
4. 3600W Powerful Output: 7200W surge output. With X-Boost™ mode, supports heavy-duty appliances up to 4600W such as clothing steamers, electric dryers, lawnmowers, and electric frying pans.
5. Long-Lasting, Durable, and Reliable: Equipped with automotive-grade full-tab LFP cells, offering 10 years of reliable power, 24/7 protection BMS, Class-B certification, and EV-grade CTC structure that protects against overnight condensation and off-road bumps during transport.
6. 2 Easy Ways to Connect to Your Home: Manual Transfer Switch and Inlet Box.
7. 10ms Auto-Switch: keep critical devices like NAS systems and servers running smoothly.
8. 25dB Whisper-Quiet Operation: Ultra-low noise (≤25dB at 600W).
9. OASIS 3.0 Smart App Control: Dashboard to monitor real-time battery status, electricity prices, and savings. Storm Guard Mode automatically activates backup power before extreme weather hits. Self-Powered Mode and Scheduled Tasks save you money daily.
10. Up to 5-Year Warranty: Includes 3-year standard warranty and 2-year extended warranty available upon EcoFlow App registration.

EcoFlow DELTA 1300 Portable Power Station

$524.30 Save $-524.30
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Shipping calculated at checkout.
• The new standard of battery-powered generators
• Charge from 0%-80% within 1 hour
• 6x AC Outlets (Total 1800W) & 1260Wh capacity
• Fast charge via solar and car
• Power 13 devices simultaneously

Discover Our Story

Powering Life
Beyond the Grid

castelow was created for people who refuse to be tethered to the wall outlet. Whether it's storm-season blackouts, remote campsites, or life on the road, we believe reliable power should go wherever you do.

From EcoFlow portable power stations and foldable solar panels to whole-home backup systems, every product is hand-selected for performance, durability, and real-world reliability.

Explore Our Story →
Solar panels generating clean energy at sunset

Loved by our customers

Excellent
4.9 out of 5 based on customer reviews
”

Powered through a 3-day outage

Our EcoFlow Delta 2 kept the fridge, Wi-Fi, and phones running through a storm outage. Setup took minutes and the app makes monitoring effortless. Absolute peace of mind.

JM
Jessica Miller Verified Buyer
”

Helped me pick the right unit

I wasn't sure which capacity I needed and the castelow team gave me clear, honest advice. My River 2 Pro fits my camping setup perfectly. Great service from start to finish.

TB
Tyler Brooks Verified Buyer
”

Solar charging works great

The 400W portable panel charges my power station faster than expected, even in partial sun. It's light, folds flat, and fits easily in the trunk. Exactly as described.

AF
Amanda Foster Verified Buyer
”

Camping game changer

Ran our cooler, lights, and camera batteries all weekend on a single charge. Quiet, no fumes, no generator hassle. Everyone at the campsite wanted one after this trip.

RM
Ryan Mitchell Verified Buyer
”

Whole-home backup, done right

Ordered the Delta Pro with the smart home panel and everything arrived quickly and well packaged. Installation was straightforward and support answered every question. Highly recommend castelow.

LD
Lauren Diaz Verified Buyer
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