Low-voltage PV kit comprising: Deye SUN-8kW 3-phase hybrid inverter, 3x Deye SE-F5C Pro, as well as 22x 460W JA Solar Full-Black glass-glass modules

This perfectly coordinated photovoltaic kit combines the state-of-the-art, true three-phase hybrid inverter Deye SUN-8K-SG05LP3-EU-SM2 with three units of the advanced low-voltage storage system Deye SE-F5 Pro-C and 22 high-performance JA Solar 460W Full-Black Glass-Glass Modules. It replaces traditional, rigid systems with a highly flexible, intelligent energy management system that operates in the safe and cost-effective 48V/51.2V low-voltage range, despite three-phase power feed-in.

With a considerable PV module output of 10.12 kWp, this set makes optimum use of the capacities of the three-phase control centre (Smart Energy Hub). It offers private households and businesses full symmetry in grid feed-in, an enormous storage capacity of 15.36 kWh and maximum independence from the public power grid.

Highlights at a glance

• True three-phase operation in the low-voltage segment: The inverter feeds the solar and battery power evenly across all three phases (400V) into your home network – ideal for the local market and for avoiding unbalanced loads.
• 15.36 kWh storage capacity: By using three SE-F5 Pro-C modules connected in parallel, you not only triple your capacity but also increase the maximum charging and discharging power of the entire storage system for periods of high power consumption.
• Future-proof LiFePO4 technology: The battery modules are based on lithium iron phosphate – currently the safest, most thermally stable and longest-lasting cell chemistry for home storage systems.
• Premium glass-glass modules: The 22 JA Solar modules impress with their extreme mechanical resilience, minimal degradation, N-type low-light efficiency and a highly efficient full-black look.
• 2 independent MPPT trackers: Enables the 22 modules to be divided into two separate strings (e.g. 11 modules east / 11 modules west) in order to maximise yield throughout the day.
• Ultra-fast UPS function: Offers automatic switchover to three-phase emergency power in under 4 ms in the event of a power failure. Important household appliances continue to run without interruption.

Areas of application

This three-phase Deye low-voltage set is the perfect complete solution for demanding projects:

• Large detached houses & multi-generational homes: Maximisation of self-consumption through the temporary storage of large amounts of energy for the evening, the night and cloudy days.
• Houses with three-phase major consumers: Optimum support for heat pumps, air conditioning systems or workshop equipment through the even distribution of power across all three phases.
• Combination with e-mobility: The PV output of over 10 kWp provides sufficient surplus in spring and summer to supply a wallbox in parallel with household and storage requirements.

Installation & safety instructions

• String wiring (MPPT): The 22 modules are ideally divided into two strings of 11 modules each. With an open-circuit voltage of approx. 38–42V per module, you achieve a perfect string voltage that lies optimally within the inverter's most efficient operating range.
• Installation & environment: Thanks to its IP65 protection rating, the inverter is suitable for installation in a sheltered outdoor area or in a garage. The three battery modules (IP20) must be installed safely side by side or stacked in a dry, frost-free indoor space (e.g. cellar or utility room).
• Installation by qualified personnel: As this is a three-phase system (AC 400V), installation, AC grid connection and the high-current DC wiring of the low-voltage batteries may only be carried out by a certified electrician.

Features

FAQs on the 8 kW three-phase low-voltage PV set

Can the system also supply heavy three-phase loads in emergency power mode?

• Yes, within the scope of the unit's output. The inverter provides genuine three-phase emergency power (400V) in the event of a grid failure. Appliances such as heat pumps or ovens can continue to operate without problems up to a total output of 8 kW, as long as the battery is sufficiently charged.

Why is a low-voltage storage system used here on a three-phase inverter?

• Safety and considerable cost advantages. Deye is one of the few manufacturers that offer highly efficient, three-phase inverters for low-cost 48V/51.2V low-voltage batteries. You benefit from the lower acquisition costs of the low-voltage modules and the simple plug & play expandability, without having to do without the advantages of a three-phase home grid.

Is the system "black-start capable" and does it recharge the batteries in the event of a grid failure?

• Yes, absolutely. Should the public grid fail for days and the batteries be completely empty, the system switches itself fully automatically back on the next morning through the first sunlight (black start). It supplies your emergency power consumers and simultaneously recharges the batteries.

How does battery management work with three modules?

• Via automatic parallel communication. The three SE-F5 Pro-C modules are connected directly to each other with short data cables. One module automatically assumes the role of the "master" and communicates representatively for the entire block with the Deye inverter via the CAN/RS485 bus. This ensures a perfectly balanced charge and depth of discharge of all units.