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SunStar Solar Freezer 21CU ST-21CF
$1,850.00 - $1,995.00$2,127.00 - $2,294.00
🇺🇸 American Made 🇺🇸
☀️ 12/24 V Solar Ready
🚚 Arrives in 2-10 Business Days
📞 Call us for a shipping quote to AK, CO, HI, and MT or to order more than one unit. Otherwise shipping is between $235-$250
- Description
- SunStar Solar FAQ
- Shipping
- Best Price Guarantee!
- Why Buy From Us
Description
SunStar Solar Chest Freezer 21CU ST-21CF
Introducing the SunStar Solar Chest 21CU ST-21CF Freezer – the perfect eco-friendly solution for high-capacity, off-grid freezing needs. Available in both AC and DC models, this 21 cubic-foot chest freezer combines energy efficiency with ample storage, making it ideal for those committed to sustainable living. Whether you’re storing food for a large family, keeping garden harvests fresh, or preparing for extended off-grid adventures, this freezer has you covered with consistent, reliable performance.
The SunStar Solar 21CU ST-21CF Chest Freezer delivers powerful performance with the flexibility to run on solar or grid AC power, making it ideal for homes aiming to cut down on bills and have a reliable emergency backup. With a spacious 21-cubic-foot capacity, it’s designed to hold everything from large grocery hauls to seasonal harvests, giving you ample room to freeze with confidence.
For those who've embraced mobile living, the DC version is your best bet. Operating solely on DC solar power, this model is built for remote living – whether it’s a secluded cabin, RV, or boat – and ensures you can enjoy dependable, high-capacity freezing even when AC power isn’t available. Advanced insulation and a solar-optimized compressor mean you get powerful, reliable storage with every use.
Features
- Made in the USA
- Double Lid Gasket
- Input Power 115VAC
- Super High Efficiency
- Multi-function thermostat: Freeze/Refrigerate
- Built-in lid light
- Operating lights for easy troubleshooting
- 4.6" polyurethane wall insulation
- Heavy duty castors pre-installed for easy movement
Both models are built tough, with ultra-thick walls, a multi-function thermostat, and a durable, corrosion-resistant exterior for long-lasting use. Heavy-duty castors come pre-installed for easy movement, and a built-in lid light adds convenience to loading and organization.
21CU AC Chest Freezer
21CU DC Chest Freezer
The SunStar Solar 21CU ST-21CF AC Chest Freezer is a versatile solution for those who want flexibility in power options. With the ability to run on either solar or grid AC power, this freezer adapts to your needs, making it ideal for energy-conscious homes, remote cabins, and anyone looking for a reliable backup during power outages. Its spacious 21-cubic-foot interior is perfect for families, hunters, or homesteaders, offering ample room to store large grocery hauls, bulk meats, and seasonal harvests with ease. This model is built for those who want to save on energy bills while maintaining dependable storage and backup power in any situation, offering both flexibility and peace of mind.
The SunStar Solar 21CU ST-21CF DC Chest Freezer is tailored for fully off-grid lifestyles, running exclusively on DC solar power. Perfect for remote cabins, RVs, boats, and homesteads, it’s designed for those who prioritize total energy independence. This model’s advanced insulation and solar-optimized compressor ensure efficient, powerful freezing even in remote settings without AC access. With its robust 21-cubic-foot capacity, this freezer provides enough room for all your essentials, from large game meat to long-term food supplies, keeping your goods frozen and fresh without relying on the grid. The DC model is a must-have for those who want an eco-friendly, off-grid freezer that’s built to handle the demands of independent living while keeping your food secure.
Specifications
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 |
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| Power Source | AC | DC |
| Total Volume | 595 Liters / 21 Cu Ft | 595 Liters / 21 Cu Ft |
| Cooling System | Direct Cooling | Direct Cooling |
| Temperature Control | Mechanism | Mechanism |
| Rated Operating Voltage | 115V AC / 60 Hz | Automatic 12v or 24v operation |
| Fuse Rating (A) | 15 Amp | 15 Amp |
| Typical Power Draw | 95 Watt / 115V 0.82 Amp | 105 watt |
| Refrigeration Agent | R134A | R134A |
| Inside Product Dimension (in) | W 72.75 / H 27.375 / D 19.5 | W 72.75 / H 27.375 / D 19.5 |
| Outside Product Dimension (in) | W 82.25 / H 37.75 / D 30.75 | W 82.25 / H 37.75 / D 30.75 |
Why SunStar
Sun Star's commitment to quality shines through in every detail of their appliances. By carefully selecting premium materials and conducting rigorous testing, Sun Star ensures each product meets exceptional standards for durability and performance. This dedication results in reliable, long-lasting appliances that customers can count on for years. With Sun Star, customers gain peace of mind, knowing they’ve chosen a brand that values excellence and prioritizes their satisfaction.
SunStar Solar FAQ
What is a SunStar Solar Refrigerator?
SunStar Solar Refrigerators are high-efficiency, off-grid appliances made in the USA, designed specifically to run on solar power. They come in both upright and chest styles and are ideal for cabins, homesteads, tiny homes, RVs, and remote locations. They’re known for low energy consumption, durable build, and dual-compartment flexibility—fridge and freezer in one.
What’s the difference between a DC model and an AC model?
DC models (12V or 24V) run directly off your battery bank and solar charge controller—perfect for off-grid systems. They don’t need an inverter and are more energy efficient.
AC models (115V) plug into standard home outlets. These are great if you're using a generator or on-grid backup. They require an inverter if used off-grid, and typically draw a bit more power.
Tip: If you're running a full solar setup with batteries, the DC model is usually the better long-term option.
What sizes and models are available?
- ST-10RF: 10 cu. ft. upright – 6.6 cu. ft. fridge + 3.2 cu. ft. freezer
- ST-8C: 8 cu. ft. chest-style combo
- ST-16RF: 16 cu. ft. upright – one of the largest off-grid units in North America
All models are available in either DC or AC versions depending on your power setup.
What size of solar panel do I need?
It depends on the model and your usage. As a general guide:
- 10 cu. ft. DC unit: ~250–300W panel + 100Ah battery
- 16 cu. ft. DC unit: ~350–400W panel + 150Ah battery
You’ll also want to ensure 4–6 hours of full sunlight daily and proper tilt on your solar panels.
Do I need a battery or charge controller?
Yes, for all DC models, a battery bank and charge controller are required. The solar panel charges your battery through the controller, and the fridge draws from the battery. AC models require an inverter and battery if you are off-grid.
How do I connect solar panels to the unit?
The typical connection flow is:
Solar panel → Charge controller → Battery bank → Fridge
DC units connect directly to the battery. AC units require an inverter to convert DC battery power into 115V AC.
How should I transport and install the fridge or freezer?
Always transport the unit upright. If it must be laid down, stand it upright and let it sit unplugged for 12+ hours before turning on. Leave 1–2" of space around the sides and back for airflow. Place on a level surface indoors out of direct sun. Plug into a fused DC circuit or standard 115V outlet (depending on model).
How do I set the temperature?
Use the built-in digital thermostat on the fridge. Fridge temps should be set between 35–38°F and freezer around 0°F. SunStar units allow independent control of fridge and freezer compartments for better performance.
What do the red fault light codes mean?
- 1 blink: Low voltage — battery too weak
- 2 blinks: Fan overload or blockage
- 3 blinks: Compressor start error
- 5 blinks: Controller or sensor overheat
If you see a fault light, turn off the unit, check your battery voltage, wiring, and airflow around the unit. Most issues resolve with restored voltage or better ventilation.
How long does it take to cool down?
It usually takes 8–12 hours to reach full temperature after first being plugged in, depending on ambient temperature and load. For best results, cool it down before loading food and avoid frequent door openings.
What kind of insulation and compressor do SunStar units use?
SunStar fridges use thick 4" to 4.5" polyurethane foam insulation for maximum energy efficiency. They’re equipped with Secop (formerly Danfoss) DC compressors—known for reliability, quiet operation, and very low power draw. Some models use two compressors for better cooling control.
What’s the warranty on SunStar appliances?
SunStar offers a limited manufacturer warranty. This covers defects in materials and workmanship.
Shipping
Your SunStar appliance ships out the day you order it in most cases, or if it's later in the day, it will ship out the following morning. You can expect to receive your SunStar in 2-10 Business days, depending on your address.
Most shipping locations will cost $235-$250 to send out one unit. If you're ordering more than one unit, call, text, chat or email us for a quote.
If you need shipping to AK, CO, HI, and MT, contact us for a quote.
You're going to LOVE your SunStar!!
Best Price Guarantee!
Best Price Guarantee
You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower!
We love to chat! Give us a call and we'll see what we can do to get you the best deal!
Conditions of our 100% Price Match Guarantee:
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Contact us to discuss the Price Match so we can look up the competitors price
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Buy one, get one free offers and Rebates are not eligible
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The item must be in stock on the competitors website
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The competitor must be an online store, not a retail location
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The website can't be a discounter or auction website ( such as eBay, overstock, etc.)
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The company must be an Authorized Retailer of the product in question
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The Price Match Guarantee is based on the final price of the product including shipping and taxes
Why Buy From Us
Why Buy From Wild Oak Trail?
We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.
We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!
We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.
Thanks for supporting our family and being part of the Wild Oak Trail community!