Deye inverters and batteries

Ningbo Deye Inverter Technology Co., Ltd. was founded in 2007 and has since become one of China's leading high-tech companies, now listed on the Shanghai Stock Exchange. It may surprise you to learn that the company started out manufacturing dehumidifiers and solar air conditioners and these are still thriving businesses today. With more than 25,000 sqm of factory space and full manufacturing and testing facilities, it has become a dominant player in the global solar inverter market. This is supported by a company size of 5,000 employees.

In 2023, our Managing Director and Wholesale Manager discussed a formal distribution partnership for the Solar Kit European market during a factory visit lasting several days. After maximum precision, robotized and optimized production lines, we watched stress tests simulating extreme temperatures. Equipment had to endure 60-degree floors or -35-degree winter nights. The inverters were subjected to the rigours of sea and land transport for tens of thousands of hours. Major testing and certification institutions such as TÜV no longer physically inspect Deye's inverters and batteries because they also operate an accredited laboratory on the Ningbo factory site. This ensures the promise of up to 10 years replacement warranty and component-by-component serviceability.

Deye inverters

Phase asymmetry capability

One of the biggest advantages of hybrid inverters is their ability to asymmetrically power electrical appliances operating on 3 phases in the house. This is a feature that can be a decisive factor in the choice.

To use an everyday example of a 3-phase property, phase 1 has an electric boiler, phase 2 has the lighting and phase 3 has the kitchen appliances. During the day, when the water heater is on and the appliances in the kitchen are in use, no appliances are on in phase 2 (no lighting), in which case no energy is used. An inverter that does NOT know how to handle phase asymmetry will in this situation synchronize to the phase with the lowest consumption, which is close to zero, so the production of the solar system used locally will be close to zero, in other words the kWhs produced will be lost, we cannot use them to the maximum.

Deye's phase-assymmetric output hybrid inverters maximise the on-site consumption of the solar PV generation, which is essential in a back- and gross-metered system.

Fully independent island mode

With Deye's hybrid inverters and batteries, full off-grid islanding is possible, as they can handle dozens of battery brands, wind or diesel generators.

In terms of price and technical capabilities, before choosing an inverter, be sure to decide your future plans for the system. If not at present, but in the future it is conceivable to add a battery to the system, it is definitely worth choosing a Deye hybrid inverter.

If a battery is connected, the inverter can automatically switch to isolated operation within 4 milliseconds, which corresponds to uninterruptible power supply. In island mode, the maximum available power is 75% of the rated AC power of the Deye inverter. Maximum power per phase is 7.5kW. The inverter is capable of delivering 100% of rated power for 1 phase.

Deye inverters have a built-in backup box so that in the event of a power failure, the property's electrical consumers can continue to operate without interruption as long as they remain within the range specified above. This can be sustained in sunny weather with DC-side generation or the energy available in the battery lasts.

Deye's SUN-5/6/8/10/12K-SG04LP3 range is an excellent solution for the needs of the European market, combined with batteries and smartmeter.

Deye batteries

In addition to their hybrid inverters, they have also developed their own energy storage systems, which provide a reliable power supply in remote areas or rural settlements. Off-grid (island) systems require a battery to be connected to the system, without which it cannot operate as an island system. Deye is highly advanced in energy storage solutions. One of their popular residential solutions is the RW-M6.1 battery, a 6.1 kWh pack that allows the design of stand-alone or hybrid systems. More of these can be connected together, making it easy to increase capacity.

The electricity generated by a photovoltaic (PV) system during the day is initially used by consumers. The excess energy is then used to charge the battery via the Deye real full hybrid inverter. Backup power for critical loads: the system is equipped with independent critical load output ports and mains ports. This allows critical loads such as refrigerators, routers, lights, computers and other critical appliances to be powered in the event of a network failure.

Summary

We are confident in using Deye inverters and batteries for both our residential and SME designs, while our hybrid designs that can handle phase asymmetry are popular wholesale products. These are market leaders in South Africa and Brazil, for example, and the brand is also enjoying soaring popularity in Hungary and in Europe.  Last but not least, they compete in the market with outstanding prices.

In addition to excellent value for money, the Chinese manufacturer offers a 5+5 year full warranty and a replaceable parts and repair function.