Solar DC Refrigerator Dual Zone 12V 24V Off-Grid SDR Series
Dual-zone 12V/24V solar DC refrigerator with 0–10°C chilling, ≤−18°C freezing and 250–500W reference PV options for off-grid EPC projects.
- Separate 0–10°C and ≤−18°C zones keep fresh and frozen stock apart
- DC 12V/24V input integrates with a matched PV, controller and battery system
- 48L–124L freezer-compartment references include top-freezer and no-frost layouts
- 75–103W power ratings help compare model-level electrical requirements
- 250–500W PV and 150–250Ah battery references guide preliminary system sizing
SDR Series 12V/24V Dual-Zone Solar DC Refrigerator for Off-Grid Storage
The Sungreat Energy SDR Series is a 12V/24V DC dual-zone refrigerator platform for off-grid shops, distributors and commercial sites that need both chilled and frozen storage where grid power is unavailable or unstable.
Its upright cabinet combines a 0–10°C refrigerator compartment with a ≤−18°C freezer compartment, allowing fresh and frozen stock to be stored in one unit. The DC input supports integration with a matched PV, charge-controller and battery system.
Across the four dual-zone configurations, the current Technical Specifications list freezer-compartment references of 48L, 80L, 124L and 98L. The available layouts include top-freezer and top-refrigerator versions, with the 98L configuration currently identified as no frost. Power ratings range from 75W to 103W, while model-specific PV references range from 250W to 500W and battery references from 150Ah to 250Ah.
These figures provide a starting point for EPC comparison and quotation preparation, but they do not guarantee the same daily energy use under every condition. Final refrigerator, PV and battery sizing should consider ambient temperature, incoming product temperature, daily loading, door-opening frequency, local peak sun hours, shading, battery chemistry and required backup time. Measured Wh/24h should be used for final project verification where available.
Solar DC Refrigerator Dual Zone 12V 24V Off-Grid SDR Series Technical Specifications & Datasheet
| Model | SDR | ||||||
| Type | Single door | Double Door Top Freezer |
Double Door Top Freezer |
Double Door Top Refrigerator |
Double Door Top Refrigerator No Frost |
Solar Ice Maker | Solar Ice Maker |
| Freezer compartment (L) | 5L | 48L | 80L | 124L | 98L | 198L | 30kgs/day |
| Input Voltage | DC 12V/24V | DC 12V/24V | DC 12V/24V | DC 12V/24V | DC 12V/24V | DC 24V | DC 24V |
| Temperature Range (Fridge / Freezer) |
0-10°C | 0-10°C / ≤-18°C | 0-10°C / ≤-18°C | 0-10°C / ≤-18°C | 0-10°C / ≤-18°C | ≤-18°C | ≤-18°C |
| Rated power (W) | 50W | 75W | 90W | 98W | 103W | 225W | 165W |
| Production Dimensions (mm) | 450*445*500 | 480*490*1105 | 520*550*1515 | 580*590*1660 | 595*695*1860 | 555*578*1410 | 354*428*637 |
| Carton Size (mm) | 500*490*520 | 500*540*1160 | 570*605*1550 | 630*635*1720 | 650*735*1950 | 580*650*1465 | 430*525*685 |
| Refrigerant | R134a | R134a | R134a | R134a | R600a | R134a | R134a |
| Solar Panel Power (W) | 250W | 250W | 300W | 400W | 500W | 1000W | 400W |
| Battery Capacity (Ah) | 150Ah | 150Ah | 200Ah | 200Ah | 250Ah | 250Ah*2 | 250Ah |
Get Your SDR Dual-Zone Solar Refrigerator Project Quote
0–10°C refrigeration / ≤−18°C freezing | 12V/24V DC | 250–500W reference PV | 150–250Ah battery references
SDR 12V/24V Dual-Zone Solar DC Refrigerator Overview | 0–10°C & ≤−18°C
Solar DC Refrigerator Dual Zone 12V 24V Off-Grid SDR Series Project & Application Cases
The following are potential application references, not confirmed completed SDR installations. Final refrigerator, PV and battery sizing must be recalculated for the installation location, season, shading, ambient temperature, incoming product temperature, daily loading, door-opening frequency, battery chemistry and required backup time.
Kenya / East Africa Rural Grocery
A 48L freezer-compartment configuration is listed at 75W, with 250W PV and 150Ah battery references. Using an illustrative 45% compressor duty cycle:
Estimated energy use = 75W × 24h × 0.45 = 810Wh/24h
Using 5 peak sun hours and a 75% preliminary system factor:
PV estimate = 810Wh ÷ (5 × 0.75) ≈ 216W
The listed 250W PV reference is above this preliminary estimate. Hot-season ambient conditions, shading, product loading, battery chemistry, usable capacity and actual Wh/24h still need to be verified before final approval.
Philippines / Southeast Asia Island Shop
For the 124L freezer-compartment configuration, an illustrative 50% compressor duty cycle gives:
Estimated energy use = 98W × 24h × 0.50 = 1,176Wh/24h
Using 4 peak sun hours and a 75% preliminary system factor:
PV estimate = 1,176Wh ÷ (4 × 0.75) ≈ 392W
This result is close to the listed 400W PV and 200Ah battery references. The final design still needs to confirm actual daily energy use, local solar conditions, battery voltage and chemistry, usable capacity and required backup time.
98L No-Frost Reference
The 98L no-frost configuration is listed at 103W, with 500W PV and 250Ah battery references. It can be considered where a no-frost layout is required, but these references do not by themselves confirm daily energy use or backup performance.
Measured Wh/24h, battery voltage, usable capacity, temperature recovery and site conditions should be verified before the project is approved.
Solar DC Refrigerator Dual Zone 12V 24V Off-Grid SDR Series Production Process
Production begins with an approved order sheet that identifies the SDR configuration, DC 12V/24V input, freezer-compartment layout, refrigerant, reference PV and battery package, and required labels or accessories. This order record helps keep the 48L, 80L, 124L and 98L configurations separated during material preparation and assembly.
| Production stage | Main checks |
|---|---|
| Order and material matching | Cabinet parts, doors, hinges, gaskets, shelves, refrigeration components, DC controls, labels and matched solar-system items are checked against the approved order |
| Cabinet and compartment assembly | The two-compartment structure, door alignment, hinge fit, gasket seating, shelving and internal fittings are inspected |
| Refrigeration and DC installation | The refrigeration circuit and DC control components are installed according to the exact model; three standard dual-zone configurations list R134a, while the 98L no-frost version lists R600a |
| Functional testing | Compressor startup, DC input, control response, door sealing and refrigerator/freezer temperature pull-down are checked |
| Final order review | Model number, DC voltage, refrigerant, carton dimensions, PV and battery references, labels and accessories are compared with the approved order before release |
Temperature pull-down and final acceptance checks are carried out according to the approved quality-control plan. Inspection duration, sampling level and acceptance limits may vary by order and model, so the SDR Series is not presented as having one universal 48-hour test for every configuration.
Solar DC Refrigerator Dual Zone 12V 24V Off-Grid SDR Series Overview & Details
The SDR Series is built around four upright dual-zone configurations rather than one fixed cabinet. Each model combines a 0–10°C refrigerator compartment with a ≤−18°C freezer compartment.
The current Technical Specifications list two top-freezer layouts with 48L and 80L freezer-compartment references, plus two top-refrigerator layouts with 124L and 98L freezer-compartment references. The 98L version is currently identified as no-frost.
| Overview point | Current SDR reference | Planning impact |
|---|---|---|
| Temperature zones | 0–10°C refrigerator / ≤−18°C freezer | Keeps fresh and frozen stock in separate compartments |
| Cabinet layouts | 48L and 80L top freezer; 124L and 98L top refrigerator | Matches different stock mixes and access preferences |
| Production dimensions | 480 × 490 × 1,105 mm to 595 × 695 × 1,860 mm | Affects floor space, doorway access, handling and freight planning |
| Power ratings | 75W to 103W | Helps compare the electrical demand of each model |
| Reference PV options | 250W to 500W | Provides a starting point for solar-system planning |
| Battery references | 150Ah to 250Ah | Must be matched with voltage, chemistry and required backup time |
| Refrigerant | R134a for three configurations; R600a for the 98L no-frost version | Local service availability and destination requirements should be checked |
The power ratings and PV/battery references are useful for preliminary comparison, but they do not replace measured Wh/24h under the required ambient temperature, loading and usage conditions. Final solar sizing also needs to account for incoming product temperature, door-opening frequency, shading, local peak sun hours, battery chemistry and required backup time.
The right configuration depends on freezer-compartment volume, cabinet layout, no-frost requirements, available installation space and the complete solar-battery design. Confirm the exact model, refrigerant, voltage and matched system configuration before quotation. For applications that require frozen-only storage, review the SF Series solar freezer range as a separate product option.
Solar DC Refrigerator Dual Zone 12V 24V Off-Grid SDR Series Packaging & Delivery
Packaging is planned around the upright cabinet, removable components, and the final shipping route. Internal cushioning helps protect the door corners, hinges, seals, control panel, compressor, and condenser area during handling. Removable shelves and accessories are secured separately to prevent movement inside the cabinet.
| Packing area | Delivery arrangement |
|---|---|
| Cabinet and door assembly | EPE or foam protection is added around corners and impact-prone areas before the outer carton is applied |
| Shelves and accessories | Packed or secured separately and checked against the approved order |
| PV panels and batteries | Packed separately when included in the solar configuration, with model and quantity recorded in the packing list |
| Pallets or wooden supports | Added according to the shipping route, handling risk, and loading method |
Carton dimensions vary across the four dual-zone SDR configurations, from 500 × 540 × 1,160 mm to 650 × 735 × 1,950 mm. Importers should calculate the CBM for each model separately:
CBM = carton length (m) × carton width (m) × carton height (m) × quantity
For mixed-model orders, carton labels identify the model number, DC input voltage, refrigerant type, and included accessories. The final carton quantity, pallet or wooden-support requirements, container loading plan, and delivery schedule are confirmed after the model mix, packing method, destination port, carrier, and customs requirements are reviewed. The packing list and loading record are checked against the approved order before dispatch.
FAQ of Solar DC Refrigerator Dual Zone 12V 24V Off-Grid SDR Series
Start with the frozen-storage volume, fresh-to-frozen stock ratio, cabinet layout and complete solar-system demand. The following table provides a preliminary configuration reference:
| Freezer compartment | Power rating | Reference PV | Battery reference | Layout |
|---|---|---|---|---|
| 48L | 75W | 250W | 150Ah | Top freezer |
| 80L | 90W | 300W | 200Ah | Top freezer |
| 124L | 98W | 400W | 200Ah | Top refrigerator |
| 98L | 103W | 500W | 250Ah | Top refrigerator, no frost |
The freezer figure is not the refrigerator’s total usable capacity. Before quotation, confirm the total refrigerator volume, daily loading, door-opening frequency, cabinet space, ambient temperature, battery voltage and chemistry, and required backup time. The PV and battery values are starting references and still require verification for the installation site.
The current Technical Specifications confirm two temperature zones, but they do not confirm independent temperature control for both compartments.
| Item | Current SDR page status |
|---|---|
| Refrigerator temperature range | 0–10°C |
| Freezer temperature range | ≤−18°C |
| Separate refrigerator and freezer zones | Confirmed |
| Independent thermostats | Not confirmed |
| Separate compressors | Not confirmed |
| Independently adjustable setpoints | Not confirmed |
For a project that requires separate temperature adjustment, request the exact controller type, compressor arrangement and a model-specific temperature test under the expected ambient temperature and load. The test should record temperature stabilization, recovery after door openings and sensor positions. Until these details are verified, describe the product as having separate refrigerator and freezer zones rather than guaranteed independent temperature control.
Do not size the system by multiplying the refrigerator’s rated power by 24 hours as if the compressor runs continuously. Use measured daily energy consumption where available. If a model-specific Wh/24h test is not available, use a duty-cycle estimate for preliminary sizing, then verify it under the target ambient temperature, loading and operating conditions.
| Sizing step | 90W dual-zone reference example | Limitation |
|---|---|---|
| Assumed compressor duty cycle | 40% | Preliminary assumption only |
| Estimated daily load | 90W × 24h × 0.40 = 864Wh/day | Replace with measured Wh/24h |
| PV calculation | 864Wh ÷ (5 peak sun hours × 0.75 system factor) ≈ 230W | The listed 300W PV is a preliminary reference |
| Battery illustration | 24V × 200Ah = 4,800Wh nominal | Usable energy depends on battery chemistry, depth of discharge and efficiency |
| Usable energy illustration | 4,800Wh × 80% × 90% ≈ 3,456Wh | This is not a runtime guarantee |
For final sizing, confirm the exact SDR model, local peak sun hours, hot-season ambient temperature, door-opening frequency, warm product loading, shading, cable loss, battery chemistry, low-voltage cutoff and required backup period. A 24-hour operating target requires a matched PV array and battery system. The reference values are for preliminary design and quotation, not a universal guarantee.
For PV module options to review during preliminary planning, see the SP Series N-Type TOPCon solar PV panels. The final module selection still depends on local solar conditions and the matched controller and battery design.
The SDR Technical Specifications confirm DC 12V/24V input, but they do not confirm that the refrigerator can accept an unregulated solar-panel string directly. The preliminary system path is:
PV array → compatible charge controller → matched 12V/24V battery bank → DC fuse or breaker → SDR refrigerator
| Connection item | Current SDR status |
|---|---|
| Refrigerator input | DC 12V/24V confirmed |
| Raw PV panel connection | Not confirmed |
| Charge controller | Use in the preliminary system path |
| Matched battery bank | Included in the preliminary system path |
| AC inverter | Normally unnecessary for a correctly matched DC system |
| Final checks | Controller output range, compressor starting current, cable size, polarity, fuse rating and low-voltage cutoff |
Do not connect the SDR directly to a PV panel until the exact model’s wiring diagram and approved PV/input range are confirmed. Solar-panel voltage changes with irradiance and temperature, while the refrigerator requires controlled DC voltage and protection. Direct-drive solar refrigerators are a separate system architecture, so their connection method should not be applied to the SDR without model-specific confirmation.
For projects that also include AC loads or need grid-connected or hybrid operation, see the SY Series complete hybrid solar power system as a separate system option.
Cooling time depends on more than the refrigerator’s rated power. Warm contents, frequent door openings, high ambient temperatures, restricted airflow, low battery voltage, voltage drop during compressor start-up, or poor DC connections can all delay temperature pull-down.
| What you notice | Check first | What it may indicate |
|---|---|---|
| The compressor starts slowly or stops unexpectedly | Measure voltage at the refrigerator terminals during start-up; check the fuse, polarity, controller output, and cable connections | Weak battery or DC voltage drop |
| Both compartments cool slowly | Check cabinet shading, ventilation clearance, ambient temperature, warm loading, and door-opening frequency | High refrigeration load or poor heat dissipation |
| Only one compartment misses its range | Inspect that compartment’s door gasket, loading, internal airflow, and temperature reading | A local sealing, loading, or airflow issue |
| Temperatures fluctuate during the day | Record both compartment temperatures and battery voltage over a full day | Helps separate a cooling-load issue from a power-supply issue |
If the problem continues, provide the exact SDR model, battery type, terminal voltage, PV and controller arrangement, installation conditions, cable details, and temperature record for further diagnosis.
Not based on the current SDR specifications alone. The product page lists a 0–10°C refrigerator zone, but this range by itself does not confirm medical-grade temperature control or vaccine suitability. The current SDR information does not document WHO/PQS prequalification, calibrated temperature logging, temperature mapping, alarm functions, holdover or autonomy testing, or model-specific medical validation.
The SDR Series is positioned for food, beverages, and general off-grid commercial refrigeration. For medical storage, the exact model and complete solar-battery configuration must first be checked against:
- the required temperature band for the stored product
- temperature monitoring and alarm requirements
- temperature uniformity and mapping results
- required holdover or autonomy time
- ambient temperature and loading conditions
- applicable regulatory or WHO qualification
Until these items are verified for the exact configuration, do not present the standard SDR as a vaccine or medical refrigerator.
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