A solar powered refrigeration system is four components that only work when they are specified together: a photovoltaic panel that harvests, a controller that regulates, a battery that carries the cold through the night, and a DC freezer built to run on that supply. Buy them separately and the weakest one sets the limit. The Direct Drive 3 is that set, matched and shipped as one package - so the freezer reaches temperature on the first afternoon and keeps it through the first cloudy week.

A complete system, not just a cabinet Most suppliers quote a DC freezer and leave the energy side to the buyer. The panel is then undersized, the controller is the cheapest one on the local market, and the battery is whatever the installer had in stock. The cabinet takes the blame when the site fails. Direct Drive 3 is quoted as a system: panel wattage, controller rating, battery capacity and cabinet volume are calculated against your sun hours and your daily load. One supplier, one warranty conversation.

Power moves in one direction and is used at two points. The panel feeds the smart controller, the controller charges the battery and feeds the freezer at the same time, and the freezer draws from the battery only when the panel output falls.

Three modes, no manual changeover Sunny days - the panel runs the compressor directly and tops up the battery at the same time. Cooling costs nothing and the battery stays full. Night, rain or heavy cloud - the controller hands the load to the battery. The cabinet keeps freezing without an operator doing anything. Optional AC / generator adapter - where a mains socket or a small generator exists, the adapter can recharge the battery during a long overcast spell. It is an option, not a requirement.

We build both types, so we have no reason to sell you the wrong one. The difference is not quality, it is what your site can support.

A thicker wall reduces the battery you have to buy. That is the whole commercial argument for foam: every millimetre either saves panel and battery capacity, or it costs you both.

65 mm - standard specification for ordinary commercial duty and temperate sites. 110 mm - tropical specification, for ambient above 38 °C or long autonomy requirements. Microcellular cyclopentane foam, dual-foamed. Up to 72 hours of cold retention with the lid closed, which is what makes a small battery viable in the first place. Safety lock and casters - key lock on the lid, heavy-duty wheels so the cabinet can be repositioned without emptying it.

Cabinet volume, panel wattage, battery capacity and adapter rating are calculated per site against sun hours, ambient temperature and daily load. Send the location and we will size the system rather than guess.

Remote islands and farms. No grid to connect to, no fuel to haul. The panel is the power station and the cabinet is the cold room.	Outdoor vending kiosks. Ice, drinks and frozen snacks sold from a stall that has no metered supply - and a battery that keeps the stock hard overnight.
Mining, research and field camps. Cold chain for samples, food and medical supplies where a diesel generator is expensive to feed and noisy to live beside.	Frequent blackout areas. Mains where it exists, battery where it does not, and a cabinet that does not notice the difference.

Our service

 

01

- MOQ is as low as 1 piece for DC solar freezers, making business initiation straightforward for retailers and distributors worldwide.

 

02

Our facility has advanced equipment: automated welding & forming machines, auto foaming line, and imported leak detectors/pressure meters. These ensure precise production, quality control, efficient output, and on-time deliveries.

 

03

- Benefiting from a prime location near Yiwu port, Shanghai port, and Ningbo port, we enable smooth export processes and reduce logistical complexities.

 

04

Dedicated to rapid resolution of customer inquiries, we prioritize precision in support-delivering tailored insights and solutions to elevate satisfaction and solidify long-term partnerships.

CE

CE

Patent Certificate

Patent Certificate

Patent Certificate

Inside Juka - How This Freezer Is Made

Hangzhou Juka Solar Technology Co., Ltd. was founded in 2015 with a single focus: combining solar energy, new energy and smart technology with refrigeration. Today we design and manufacture solar cold-chain products - solar freezers, solar refrigerators, solar ice makers, solar mobile ice-cream carts, ice-cream delivery tricycles and beverage retail carts.

Every product we make is exported. Our customers are mainly in Belt and Road countries and regions, and our work does not stop at the container: we help partners set up their own local production facilities for retail and delivery refrigeration products - creating jobs, improving living standards, and switching more of the cold chain onto clean energy.

Manufacturing and Testing Equipment

Quality Control, Step by Step

Foaming takes place in a constant 20–23 °C foaming room, removing seasonal variation from foam quality.

Nitrogen purging on both the condenser and evaporator sections before any pipe connection, to protect internal circuit cleanliness.

Vacuum standard of below 20 Pa. A unit that does not reach spec is not charged with refrigerant - no exceptions.

Two leak tests per cabinet with an INFICON detector: once unpowered, once running.

Constant-temperature test room confirms refrigeration parameters, so units are tested under identical conditions year-round and performance claims stay honest.

Separated production and quality control. Only cabinets signed off by a QC inspector can be packed and warehoused. Production answers to production; quality answers to quality.

A dedicated process and quality assurance department maintains written process standards for every stage.

OEM & Customization Services

Build Your Own Solar Freezer Brand

We support customized solutions for global customers.

Available customization:

✔ Customer logo
✔ Cabinet color
✔ Voltage options
✔ Plug type
✔ Packaging design
✔ Product configuration

We also support:

OEM

ODM

SKD

CKD cooperation

Helping partners build their own local refrigeration business.

Send us four things: the location (or average sun hours), the ambient temperature range, what you will store, and how many hours of autonomy you need. We will come back with panel wattage, battery capacity, foam specification and cabinet size - and the price for your quantity.

Minimum order is one piece for DC solar systems. Mixed containers are accepted for first orders. SKD and CKD kits are available for distributors assembling locally.