Solar Freezer -18°C for Off-Grid Projects 68L-1688L SF Series
68L–1688L model-specific 12V/24V DC solar chest freezers provide ≤−18°C frozen storage with matched PV-battery options for distributors and commercial cold-chain projects.
- 68L–198L options fit smaller stock volumes; 658L–1688L models handle larger commercial inventory
- ≤−18°C frozen storage supports meat, fish, ice cream and other frozen products
- DC 12V/24V operation can avoid a separate AC inverter in a correctly matched system
- 38W–271W consumption with 250W–1200W PV and 150Ah–800Ah references guides system sizing
- Matched PV-battery-controller kits can be supplied with OEM, CKD and SKD options
SF Series 68L–1688L 12V/24V Solar Chest Freezer for Off-Grid Commercial Cold Storage
The SF Series covers an advertised 68L–1688L capacity range for off-grid and weak-grid frozen storage. Current listed configurations use DC 12V/24V, with the 658L–1688L models using DC 24V, and are specified for ≤−18°C frozen storage. Listed power values range from 38W to 271W across the displayed configurations.
The chest-freezer range suits fish, meat, ice cream and other frozen products in rural shops, farms, fishing communities, restaurants and remote commercial locations. When connected to a correctly matched battery and solar system, the freezer can help protect frozen inventory during power interruptions. Freezer capacity alone is not enough to select the correct PV and battery configuration.
Ambient temperature, door or lid opening frequency, loading temperature, local peak sun hours and required backup time all affect energy demand and battery sizing. Sungreat Energy can match the selected model with solar PV panel options, batteries and an MPPT controller, while also supporting OEM branding, CKD/SKD supply and export packing information for distributor and project orders.
Solar Freezer -18°C for Off-Grid Projects 68L-1688L SF Series Technical Specifications & Datasheet
| Model | SF | |||||||
| Power consumption | 38W | 47W | 47W | 78W | 100W | 156W | 255W | 271W |
| Input voltage | DC12V/24V | DC12V/24V | DC12V/24V | DC12V/24V | DC12V/24V | DC24V | DC24V | DC24V |
| Capacity | 98 Litre | 198 Litre | 108 Litre | 258 Litre | 358 Litre | 658 Litre | 1388 Litre | 1688 Litre |
| Temperature range | ≤-18℃ | ≤-18℃ | ≤-18℃ | ≤-18℃ | ≤-18℃ | ≤-18℃ | ≤-18℃ | ≤-18℃ |
| Inner glass door | no | no | yes | yes | yes | no | no | no |
| Key & lock | yes | yes | yes | yes | yes | yes | yes | yes |
| Inner light | no | no | Optional | yes | no | no | no | no |
| Basket/pcs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Thermostat | Mechanical | |||||||
| Colour | White | |||||||
| Defrost | Manual | |||||||
| Compressor/quantities | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 |
| Doors/quantities | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 3 |
| Product size (mm) | 552*474*847 | 820*556*847 | 580*555*834 | 952*668*834 | 1294*645*840 | 1598*885*930 | 2335*1025*930 | 3175*1025*950 |
| Carton size (mm) | 582*498*885 | 850*580*885 | 620*580*885 | 990*670*885 | 1335*665*882 | 1655*895*1010 | 2395*1035*1010 | 3235*1035*1020 |
| N.W. / G.W. (KG) | 23/25 | 34/38 | 35/37 | 54/57 | 68/71 | 93/102 | 150/155 | 174/180 |
| Loading quantity/40HQ | 286 | 166 | 228 | 125 | 81 | 28 | 16 | 12 |
| Solar Panel Power (W) | 250W | 300W | 250W | 300W | 400W | 800W | 1000W | 1200W |
| Battery Capacity (Ah) | 150Ah | 200Ah | 150Ah | 200Ah | 250Ah | 200Ah*2 | 250Ah*2 | 200Ah*4 |
Get a Free Quote for SF Solar Freezers
Need off-grid cold storage? The SF Series offers 68L–1688L capacity, ≤−18°C freezing and matched 12V/24V solar systems for rural and commercial projects.
SF Series 68L–1688L 12V/24V Off-Grid Solar Freezer Video
Solar Freezer -18°C for Off-Grid Projects 68L-1688L SF Series Project & Application Cases
Project Scope
The SF Series is intended for off-grid and weak-grid cold-storage projects in Africa, Southeast Asia and other remote markets. The range includes 68L–1688L capacities, model-specific DC 12V/24V configurations and freezing performance of ≤−18°C. Current models list power consumption from 38W to 271W, with reference PV configurations from 250W to 1200W.
Preliminary Application and System References
| Application scenario | Capacity reference | Reference solar configuration |
|---|---|---|
| Rural shops, households and small food businesses | 68L–198L | 250–300W PV with 150–200Ah battery |
| Restaurants, farms, fish retailers and frozen-food stores | 258L–358L | 300–400W PV with 200–250Ah battery |
| Wholesalers, cooperatives, supermarkets and commercial cold storage | 658L–1688L | 800–1200W PV with approximately 400–800Ah battery, using DC24V configurations |
These figures are preliminary references based on current SF configurations. The final capacity should be selected according to product type, daily loading volume, available storage space, door-opening frequency and required backup time.
Representative Application Scenarios
- Kenya and Tanzania: Potential fish and seafood storage for fishing communities, rural cold-chain points and small commercial operators
- Nigeria and Zambia: Potential meat and frozen-food storage for retailers, restaurants and local distribution points
- The Philippines and Indonesia: Potential applications for rural shops, farms, restaurants and island communities where grid power is limited or unreliable
These examples describe potential application scenarios and regional market references, not confirmed completed SF installations.
Site-Based Solar Matching
Sungreat Energy can match the selected freezer with PV panels, batteries and a controller according to local peak sun hours, maximum ambient temperature, daily usage and the required cloudy-weather backup.
For example, the 1688L configuration uses a reference 1200W PV system with four 200Ah batteries, while smaller configurations may use a 250W PV system with a 150Ah battery. These examples should not be applied to every project without checking the actual site conditions.
When correctly sized and operated, the complete system can help protect frozen inventory at ≤−18°C while reducing the risk of insufficient charging or unnecessary battery investment.
Solar Freezer -18°C for Off-Grid Projects 68L-1688L SF Series Production Process
Incoming Inspection & Order Matching: Incoming cabinets, inner liners, compressors, controllers, wiring, thermostats, door/lid gaskets and accessories are checked for appearance, quantity and basic condition. The selected model is matched with its required input voltage, battery capacity, solar panel power, controller and accessories according to the order. For complete solar kit orders, the freezer, PV panels, batteries and controller are checked as one configuration.
Cabinet & Foaming: The outer cabinet and inner liner are formed, assembled and checked before polyurethane insulation foaming is completed according to the selected freezer model. Cabinet structure, door/lid alignment, gasket fit and foam filling are inspected to support proper sealing and insulation before the refrigeration components are installed.
Refrigeration Assembly: The DC compressor, condenser, evaporator and copper tubing are installed and connected. The refrigeration circuit is checked for leakage, vacuumed and charged with the specified refrigerant for the selected model. The DC controller is set and programmed for the required 12V/24V configuration, followed by the installation of the wiring, thermostat, door/lid gasket, basket and other accessories.
Run-In, Cooling Test & Final Inspection: Each completed freezer is powered on for a run-in and aging check. The team verifies compressor start-up, cooling performance, temperature control, electrical operation, door/lid sealing and overall appearance. Before packing, the model, input voltage, battery capacity, solar panel power, accessories, labels and packing list are checked again where applicable.
Solar Freezer -18°C for Off-Grid Projects 68L-1688L SF Series Overview & Details
The SF Series uses a chest-style cabinet with an advertised capacity range from 68L to 1688L, allowing buyers to match storage volume with the scale of a rural shop, food business or commercial cold-storage project. The current detailed configurations range from 98L to 1688L.
Depending on the model, the freezer operates on DC 12V/24V and is specified for ≤−18°C frozen storage. The larger 658L–1688L configurations use DC 24V. Selected models include inner glass doors, lighting and different lid or door arrangements. The 1388L and 1688L models use dual compressors for their larger refrigeration load.
A mechanical thermostat and manual defrost keep daily operation straightforward in off-grid locations. Reference solar configurations range from 250W PV with a 150Ah battery for smaller listed models to 1,200W PV with four 200Ah batteries for the 1688L model. These are model-specific reference configurations rather than universal guarantees.
Final PV and battery sizing should be checked against local peak sun hours, maximum ambient temperature, door-opening frequency, the temperature and quantity of newly loaded products, usable battery capacity and the required cloudy-weather backup.
With the selected freezer model, Sungreat Energy can provide a matched PV, battery and controller configuration. Buyers can also review the available solar PV panel options, while the final array and battery bank should be confirmed according to the model and project site.
Solar Freezer -18°C for Off-Grid Projects 68L-1688L SF Series Packaging & Delivery
Export Packing: SF freezers are packed in reinforced export cartons with EPE or other protective cushioning. Separators and corner protection are arranged according to the selected model and transport conditions. Pallets or wooden reinforcement may be added for larger units or long-distance shipments to reduce the risk of damage to the cabinet, lid or doors, and refrigeration components. Small accessories, when included, are packed separately and checked against the packing list.
Container Planning: Freezer-only loading quantity varies significantly by capacity. As current reference data, the 98L model is listed at 286 units per 40HQ container, while the 1688L model is listed at 12 units per 40HQ container. These figures apply to the freezer-only loading plan and should not be treated as a fixed result for every order.
Before production and shipment, carton dimensions, net weight, gross weight, loading quantity and the final packing plan are confirmed so distributors can estimate CBM, freight and landed cost more accurately.
Complete Solar Kit Orders: When PV panels, batteries, the controller and the freezer are ordered as one complete solar solution, Sungreat Energy prepares a separate packing and container plan for the full shipment. Panels, batteries and freezers require different packing space and loading arrangements, so freezer-only loading data should not be used to calculate the complete kit.
The final packing list, CBM, freight calculation and unloading arrangement are confirmed according to the selected configuration and destination.
Shipment Confirmation: Before loading, the freezer model, order quantity, solar components, accessories and packing list are checked against the order. Loading photos and shipping documents can be prepared according to the project and logistics requirements. The estimated delivery schedule is confirmed based on the destination, shipping method and carrier arrangement.
FAQ of Solar Freezer -18°C for Off-Grid Projects 68L-1688L SF Series
Choose from the advertised 68L–1688L range according to stock volume, product type and daily loading. For the current displayed configurations, 98L–198L suits smaller rural shops and food businesses. The 258L–358L range provides more room for restaurants, farms, fish or meat retailers and frozen-food stores. Wholesalers, cooperatives, supermarkets and larger cold-storage operations can consider the 658L–1688L range.
Capacity alone is not enough. Package size, daily loading volume, loading temperature, door or lid opening frequency, ambient temperature, installation space and required backup all affect the suitable model. The advertised 68L entry point is not included in the current detailed table, so confirm its model-specific data before quoting.
If you need both chilled and frozen compartments rather than a single chest freezer, compare the SDR solar refrigerator range. Share the stored products, daily volume and destination with Sungreat Energy for model matching.
Use the selected freezer model and site conditions as the starting point. The current SF table lists power consumption from 38W to 271W, but this is not the same as 24-hour energy use. It also gives reference pairings from 250W PV with a 150Ah battery for some smaller models to 1,200W PV with four 200Ah batteries for the 1688L model. For example, the 358L model is listed with 400W PV and a 250Ah battery, while the 658L model is listed with 800W PV and two 200Ah batteries.
A preliminary PV estimate can use: required PV power ≈ daily freezer energy demand (Wh/day) ÷ local peak sun hours (h/day), with additional allowance for controller and charging losses, battery recovery after low-sunlight periods and the required cloudy-weather backup. Daily energy demand also depends on the selected model, maximum ambient temperature, door-opening frequency, and the temperature and quantity of newly loaded products. Battery sizing should consider the battery type and usable capacity. These are reference configurations, not universal guarantees. Provide the SF model, installation city or country, stored products and required backup time so Sungreat Energy can confirm the PV array, battery bank, MPPT controller and system voltage.
Usually, yes. The SF Series is designed for DC 12V/24V operation, so a correctly configured off-grid system can run the freezer through:
Solar Panel → MPPT/Charge Controller → Battery → SF DC Freezer
This setup does not require a separate AC inverter and avoids an unnecessary DC-to-AC conversion stage. Smaller and mid-size models use 12V/24V configurations, while the larger 658L–1688L models use 24V.
The freezer should not be connected directly to an ordinary solar panel without voltage control. The freezer voltage, battery bank, controller output, cable size and protection devices must be matched as one system. If grid or generator AC power is used, an AC/DC charger or converter may be needed before the battery/DC freezer.
There is no single backup time for every SF model. The current reference configurations use battery capacities from 150Ah to 800Ah, but rated battery capacity is not the same as usable energy.
Estimated backup time ≈ usable battery energy (Wh) ÷ actual daily freezer energy use (Wh/day)
Actual autonomy depends on:
- Selected freezer model and daily energy demand
- Battery voltage, type and usable capacity
- Maximum ambient temperature
- Door-opening frequency
- Temperature and quantity of newly loaded products
- Local solar conditions and the required cloudy-weather backup
Rated freezer or compressor power alone is not enough for this calculation. A rural shop needing overnight support will require a different configuration from a fishing or cold-chain project planning for 2–3 cloudy days. The PV array must operate the freezer and recharge the battery after low-sunlight periods, so a fixed “48-hour” or “3-day” claim should not be applied to every installation. Provide the installation location, SF model, stored products and target backup days so Sungreat Energy can calculate the appropriate PV and battery configuration.
The SF Series is specified for frozen storage at ≤−18°C, but hot-climate performance should be evaluated together with the selected freezer and solar system. Higher ambient temperatures can make the compressor run longer and increase daily energy demand. If the PV array or battery bank is undersized, the available backup time may be reduced.
Before confirming a hot-climate project, check the maximum ambient temperature, freezer model, shade and airflow around the compressor and condenser, door-opening frequency, and the temperature and quantity of newly loaded products. The PV and battery system should also be sized for the hottest operating period and the required cloudy-weather backup.
The ≤−18°C specification should not be treated as a standalone guarantee for every site. Provide the installation location, expected maximum ambient temperature, stored products and required backup time so Sungreat Energy can confirm the configuration.
The SF Series can be supplied as a freezer-only product or as a complete solar kit with matched PV panels, batteries and a controller. OEM branding can be discussed for bulk orders, while CKD and SKD options can support local distribution and assembly projects, subject to the selected model and project arrangement.
For a quotation, provide the required capacity, quantity, destination country, branding requirements, and whether you need a freezer-only unit or a complete solar kit. Sungreat Energy can then confirm the freezer model, PV-battery-controller configuration, packing and loading plan before ordering.
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