A household that runs on its own solar array does not need a bigger refrigerator. It needs one whose compressor is honest about what a panel can deliver. The BCD-218 is a 218 litre double door refrigerator built around that constraint: a 173 litre fresh food compartment held between 1 and 10 °C, a 45 litre freezer held at -18 °C or colder, both driven by a DC compressor that draws 80 W at full load and accepts anything from 12 V to 24 V without a separate inverter.
The shape is deliberately ordinary. It is 550 mm wide, 570 mm deep and 1395 mm tall, stands on four feet, and closes with a stainless steel door and a mechanical thermostat. Nothing on it needs an app. What is not ordinary is what happens on the third consecutive cloudy day, when the battery is at 60 per cent and the array is producing almost nothing - which is the day that decides whether a solar refrigerator is a good product or an expensive lesson.
This page is written for the buyer who has to specify the whole system, not just the box: the array, the battery, the cable, and the place in the house where the cabinet will stand. The refrigerator is one component. The rest of the page explains how to size the other three around it.
Two compartments, two control regimes, one DC compressor. The freezer rack sits above the fresh food stack so cold air falls into the cabinet rather than being pushed against it. |
Two compartments that do not borrow each other's coldMost small solar refrigerators are a single box with a frozen plate at the top and a thermostat that has to compromise between lettuce and ice. The BCD-218 separates the duty: the freezer is held at -18 °C, the fresh compartment between 1 and 10 °C, and each side is insulated from the other by its own wall rather than by a plastic flap. That separation is what allows a household to keep meat for months and vegetables for a fortnight in the same appliance, on the same compressor, without one ruining the other.
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 The handle strip runs the full width of the cabinet. Both doors are recessed behind it, so the gaskets meet a flat face rather than each other. |
Why the freezer sits on topCold air is heavier than warm air. Put the freezer above the fresh compartment and the -18 °C mass does the sensible thing on its own: it stays where it is, and the small amount that spills downward arrives in the fridge at 0 °C, which is exactly the temperature that compartment wants. Put the freezer underneath, as bottom-mount designs do, and every door opening invites the coldest air in the appliance to fall out onto the kitchen floor. The layout also decides how often the doors open. A 45 litre freezer at the top is a short, wide box that closes in one movement; the 173 litre fresh compartment below is where the daily traffic happens, and it is at waist height where nobody has to bend. Manual defrost is a deliberate simplification. There is no heater, no timer and no fan in the freezer, so nothing in that circuit can fail quietly and drain a battery in the middle of the night. Frost builds slowly in a dry, well-sealed box; the note in the service section explains how to read it. |
1395 mm tall, 550 mm wide. The wave strip is the split between the two climates, not a decorative band. |
The 80 W figure, and what it actually does to a battery
Eighty watts is the compressor's draw while it is running. It is not the number that sizes the system, because a refrigerator compressor does not run continuously - it runs until the thermostat is satisfied, then rests. In a 25 °C room with the doors opened a normal number of times, a 218 litre cabinet typically runs between 30 and 45 per cent of the time. That band, not the peak wattage, is what the array has to replace every day.
Assumption |
Conservative |
Well installed |
| Compressor duty cycle | 45 % | 30 % |
| Running hours per day | 10.8 h | 7.2 h |
| Energy at 12 V | about 0.86 kWh | about 0.58 kWh |
| Daily charge needed | about 72 Ah at 12 V | about 48 Ah at 12 V |
| Array to cover it in 4.5 sun hours | 350 to 400 W | 250 to 300 W |
These are sizing estimates for a temperate site, not measured laboratory results. A cabinet in a 38 °C room with the door opened by children will sit at the top of the band; one shaded by a north wall and opened twice a day will sit at the bottom.
A complete loop: panel, controller, battery, cabinet. The DC cable run is the part most installations get wrong. |
Sizing the array and the battery around one applianceThree typical configurations, all with the same cabinet. The difference is how many days of autonomy the owner wants to buy.
Add the mains adapter and the arithmetic changes completely: the cabinet runs from the wall on bad days and the battery becomes a backup rather than the primary supply. That is the cheaper configuration wherever a grid connection already exists, and the one we quote most often for clinics and shops. |
Built for a house that has no grid, not for a showroom
A solar refrigerator spends its life at the end of a long cable, on a supply that sags when a pump starts, in a room where the ambient temperature is whatever the roof allows. Four details on this cabinet are there because of that, and none of them show up in a photograph.
| Detail | Why it is there |
| 12 V to 24 V input window | A 12 V bank reads 11 V under load when it is nearly empty. The compressor keeps starting rather than tripping out, so the last of the charge is still usable. |
| Mechanical thermostat | No board to fail. A capillary thermostat is a copper bulb and a contact; it survives voltage spikes that destroy digital controllers. |
| R134a refrigerant | Available from any refrigeration supplier in Africa, South Asia and Latin America. A cabinet that cannot be recharged locally is a cabinet with a five-year life. |
| G-pentane, CFC free foam | Insulation that keeps the duty cycle low, which is the only real way to make a solar refrigerator cheap to run. |
173 litres of fresh food is a week of shopping for a family of four, not a day. |
What the 173 litres actually holdThree safety glass shelves, a full width crisper drawer with its own humidity cover, and four door balconies. In practice that is a week of shopping for four people, or two crates of produce for a small kitchen that cooks every day. The freezer above takes a wire rack and holds roughly 20 kg of frozen goods - two whole chickens, a bag of fish, and the ice trays. Both compartments are lit by a single lamp behind the thermostat housing, rated for DC and replaceable without tools. |
Crisper drawer, full width. |
Four door balconies, one with an egg tray. |
Safety glass shelves, spill proof rims. |
Freezer rack, removable for defrosting. |
Where it goes in the house
A solar refrigerator is usually installed by whoever wired the house, which is why the failures we see are rarely in the cabinet. They are in the place it stands and the cable that feeds it.
Direct sun on the cabinet is the single most expensive mistake. A unit standing in a west facing window at 40 °C ambient can double its duty cycle, and no amount of extra panel fixes a cabinet that is being baked from outside. |
Installed against a shaded internal wall with free air behind the condenser. |
Reference specification - BCD-218
| Model | BCD-218 |
| Configuration | Double door, top freezer, freestanding |
| Total capacity | 218 L (fresh food 173 L + freezer 45 L) |
| Temperature | 1 to 10 °C fresh food / -18 °C and below freezer |
| Power input | DC 12 V / 24 V; 220 V or 110 V AC through adapter |
| Rated consumption | 80 W while the compressor runs |
| Compressor | DC rotary, external rotor |
| Refrigerant | R134a |
| Foaming | G-pentane, CFC free, high density cyclopentane |
| Control | Mechanical thermostat, capillary type |
| Defrost | Manual, freezer |
| Climate class | ST |
| Material | Stainless steel exterior, ABS interior liner |
| Dimensions | 550 × 570 × 1395 mm (W × D × H) |
| Packing | Standard export carton with foam corner blocks |
| Certification | CE |
| Warranty | 1 year machine, 3 years compressor |
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First 24 hours, and the five checks that keep it coldCommissioning
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Service intervals
Interval | Task | What it prevents |
| Monthly | Brush the rear condenser | Dust doubling the duty cycle in dry climates |
| Every 3 months | Check door gasket with the paper strip test | Cold loss that the thermostat hides by running longer |
| When frost reaches 5 mm | Defrost the freezer, never with a knife | Punctured evaporator, the most common write-off |
| Every 6 months | Tighten battery terminals, check fuse holder | Voltage drop and nuisance shutdowns |
| Annually | Clean the drain channel and the interior liner | Standing water and odour in humid seasons |
Packing, and what ships with the cabinet
Each cabinet travels in a printed export carton with foam corner blocks and a cardboard base, strapped, and marked with the model, the serial number and the net and gross weight. The door is taped and the shelves are packed separately inside the fresh food compartment so nothing shifts in transit.
| In the carton | Cabinet, three glass shelves, one crisper drawer, four door balconies, freezer rack, ice tray, instruction sheet |
| Optional | AC adapter (220 V or 110 V), DC cable set with fuse, solar panel and battery kit quoted separately |
| Container loading | Mixed with other models on request; the exact count per 40HQ depends on the mix and is confirmed on the proforma |
For distributors who need a private label, the door panel, the carton print and the rating label are all customizable from 100 units, and the thermostat scale can be printed in the destination language.
Questions buyers ask before ordering this model
Can it run on a single 12 V battery without a panel?It will run, and it will empty the battery. A 100 Ah battery carries this cabinet for roughly 20 to 26 hours with no charging at all, which is why we size the array first and treat the battery as autonomy, not as the supply. |
Does the 24 V version cool faster?No. The compressor is the same and the cooling capacity is the same. The 24 V version exists because a 24 V array halves the current for the same power, which lets installers use thinner cable over longer runs. |
Why manual defrost rather than frost free?A frost free freezer spends part of every day running a heater. On a solar supply that heater is paid for twice: once in energy and once in battery capacity. Manual defrost every few months is the cheaper trade. |
Can the doors be reversed?Yes, both doors can be hung on the opposite side at installation. The hinge covers are removable and the opposite fixing holes are pre-punched at the factory. |
What if the site only has 220 V mains?Order the AC adapter and the cabinet becomes a normal mains refrigerator; the DC compressor still runs, through the adapter. Many buyers take both so the unit can move between a grid connected shop and an off-grid house. |
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BCD-218 solar refrigerator - 218 L, 12 V / 24 V, double door Tell us the site: sun hours, ambient temperature, whether a grid exists, and how many days of autonomy the owner expects. We will size the array and the battery with the cabinet and quote the whole system in one document. |
Inside the factory that builds this system
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Hangzhou Juka Solar Technology was founded in 2015 around one problem: putting solar energy, new energy and smart control to work inside a refrigeration circuit. The range has since grown from a single DC chest freezer to solar refrigerators, solar ice makers, mobile ice-cream carts, delivery tricycles and beverage retail carts - all of them exported, most of them to Belt and Road markets. The work does not stop at the container. Partners in Ghana, Gabon, Cameroon, Nigeria, Kazakhstan and India are supported in setting up their own local production for retail and delivery refrigeration, which is how a cold chain becomes permanent rather than a series of one-off shipments. For a solar system this matters more than for a mains-only freezer. Panel sizing, controller rating and battery capacity all depend on cabinet volume and site conditions, so the cabinet and the electronics are engineered together instead of being bought separately by the importer. |
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What is decided before the cabinet is built
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Wall thickness is a production parameter 65 mm or 110 mm foam is set on the foaming line, not assigned in a brochure. Insulation that is specified but not achieved is the usual reason a solar cabinet underperforms in its first hot season. |
One bill of materials Panel, controller, battery and cabinet are listed together, so the importer receives a system whose parts were sized against each other rather than sourced independently. |
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Voltage as an order option DC input, AC adapter voltage, plug type and control panel artwork are selected per market on the same platform - no separate tooling run for a different destination. |
Repeatable on the second container Foam thickness, fittings and controller model are held per customer, so a follow-up order matches the first one instead of drifting. |
Certification and test documentation
CE marking covers the electrical arrangement, and utility model patents cover the cabinet and the direct-drive control layout. Documents travel with the order so they can be presented at customs and to institutional or tender buyers.
CE - low voltage and EMC |
CE - supplementary schedule |
Utility model patent - cabinet structure |
On the floor
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Six control points behind every cabinet
01 |
Foaming runs inside a constant 20-23 °C room, so the foam quality does not shift with the season. |
02 |
Condenser and evaporator are nitrogen purged before any pipe joint is made, keeping the internal circuit clean. |
03 |
Vacuum is pulled to below 20 Pa. A unit that does not reach spec is never charged with refrigerant. |
04 |
Two leak tests per cabinet with an INFICON detector - one unpowered, one running. |
05 |
A constant-temperature test room confirms refrigeration parameters under identical conditions all year. |
06 |
Production and quality control are separate departments. Only cabinets signed off by a QC inspector are packed and warehoused. |
Machines on the line
Equipment |
What it gives the buyer |
Automatic laser cutting machine |
Consistent panel geometry, tight tolerances, clean edges |
Punch press and bending machine |
Repeatable cabinet forming from unit to unit |
Dual-gun high-pressure foaming machine |
Even density across the whole cabinet, no thin spots |
CACL high-precision filling machine |
Precise refrigerant charge on every unit |
INFICON high-sensitivity leak detector |
Finds leaks that ordinary detectors pass |
OEM, ODM and local assembly
Cabinet-only supply, private label, SKD and CKD shipments are all available, together with technical guidance for partners who would rather assemble locally than import finished units. Helping partners build their own refrigeration business is the part of the work that outlasts a single purchase order.
What can be changed on a standard order:
✓ Customer logo and cabinet colour
✓ Voltage options and plug type
✓ Packaging design
✓ Product configuration, baskets and fittings
✓ Panel, controller and battery included, or cabinet supplied on its own
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