Deye SUN-15K-SG01HP3-EU-AM2 (15 kW) - three-phase hybrid inverter, high-voltage battery

What HP3 means: a high-voltage battery instead of 48 V

The SUN-15K-SG01HP3-EU-AM2 belongs to Deye's high-voltage branch of three-phase hybrids, and that is a different system architecture rather than a configuration option. The battery bus here runs from 160 to 700 V instead of the usual 48 V, while charge and discharge current is only 37 A — at 400 V that is the same roughly fourteen kilowatts a low-voltage model moves with 280 A. The consequences are entirely practical: the cable from battery to inverter needs 6 to 10 mm² instead of 70 to 95, the battery breaker 50 A instead of 300 A, and losses in the power path drop several times over. The price is the battery itself: only high-voltage banks suit HP3 — the BOS-G cabinets from 15 to 61 kWh (items 1953 to 1962), for example — and with them the Deye HVB750V/100A control box (item 2099) is mandatory, since the cluster will not work without it. Low-voltage 51.2 V modules such as SE-F5, RW-F or SE-G cannot be connected to this model at all, and that is the first thing to verify before buying.

A 160 to 700 V battery: where the real power limit sits

The battery working range is 160 to 700 V with up to 37 A in both directions, and lithium-ion only: lead is not supported here even nominally. What matters is how power arises from those numbers: 37 A at 400 V gives about 14.8 kW, while at 250 V it gives only 9 kW. In other words, the more modules in series in your bank, the more power the inverter can draw from storage. For the full fifteen kilowatts from the battery the bus must sit at no less than 400 to 420 V, meaning at least eight 51.2 V modules — a BOS-G40 cabinet (item 1964 or 1958) with its 409.6 V system voltage, for instance. A bank of three or four modules yields 150 to 200 V and caps discharge at roughly six kilowatts: the inverter will run, but it will never stretch out. This is the most common mistake when specifying HP3 systems, and capacity in kilowatt-hours does not reveal it — the cluster voltage is what has to be checked.

PV up to 1000 V and a full-load window of 420 to 850 V

The photovoltaic input here is high voltage: a 1000 V maximum, an MPPT window from 150 to 850 V and start-up from 180 V. But the datasheet carries a line absent from low-voltage models — the MPP range at full load: 420 to 850 V. Read it literally: the inverter will take its full fifteen kilowatts from the array only while string voltage stays above 420 V, and below that point output is limited by current. In practice that means strings of twelve to eighteen modern modules in series rather than short rows of six or eight: with short strings the inverter still works, but you will never see peak output. There are two trackers, asymmetric: the first accepts two strings at 26 A of operating current, the second one string at 20 A, for a total of up to 19 500 W of panels at a rated PV voltage of 600 V.

A 1.5× peak instead of double: what that changes

In island mode this model holds one and a half times its rating — about 22.5 kW for ten seconds — whereas the low-voltage LP3 and SM2 units give a double margin. For a site with heavy starting duty that difference matters: direct-on-line starting of a 7 to 8 kW three-phase motor may hit the limit, and then either a soft starter or a variable frequency drive on the motor itself becomes necessary. Where the load is mostly electronic or resistive — boilers, variable-speed pumps, a server room, refrigeration with inverter compressors — this headroom is more than sufficient. Apparent power is 16 500 W, rated output current 22.8 A per phase at 220 V and 21.8 A at 230 V with a 25 A maximum, and harmonic distortion stays below 3 %. A generator input is provided, so during long outages the set carries the load and recharges the battery through that same high-voltage channel.

80 A of transit per phase and working alongside the grid

Maximum grid input current is 80 A per phase, over 50 kW of pass-through: any domestic or small commercial site passes through this inverter in its entirety, with no need to split the board into critical and non-critical groups. While the grid is present consumption is limited only by your service connection, and the inverter meanwhile manages the flows: feeding the house from the panels, charging the battery, exporting surplus or holding it for the evening peak. Grid charging is configurable by schedule and current — under rolling outages that is the principal tool, because it keeps storage full by the moment the power goes. With such transit the incoming breaker and cable deserve attention of their own: 80 A per phase means 25 mm² copper and matching terminals. One more point: a three-phase inverter feeds the phases evenly in island mode, so single-phase circuits in the board should be distributed so that no phase exceeds roughly five kilowatts.

Thirty kilograms for fifteen kilowatts

The 408 by 638 by 237 mm housing weighs 30.5 kg — the lightest fifteen-kilowatt hybrid in this catalogue, a direct consequence of the high-voltage architecture: smaller currents mean smaller chokes, thinner busbars and a smaller heatsink. Two people handle the mounting, the wall must be solid masonry, but no lifting gear is needed. Cooling is intelligent with typical noise up to 55 dB: quieter than the fifteen-kilowatt SM2 model, yet still not a device to hang beside a bedroom. The operating range is -40 to +60 °C with derating above +45 °C, protection is IP65 and mounting is on the wall. The BMS link runs over RS485 or CAN with self-adaptation — critical in a high-voltage system, because it is the BMS that commands the control box contactor and decides whether charging is permitted.

How it differs from its neighbours in this catalogue

Within the HP3 line the differences are power and array size: the SUN-10K-SG01HP3-EU-AM2 (item 2067) offers 10 kW with a 13 kW array, the SUN-12K-SG01HP3-EU-AM2 (item 2064) 12 kW and 15.6 kW, the SUN-20K-SG01HP3-EU-AM2 (item 2070) 20 kW and 26 kW, all sharing the same 37 A battery current and 30.5 kg mass. The larger SUN-25K-SG01HP3-EU (item 2075) and SUN-30K-SG01HP3-EU-BM3 (item 2074) move to 50 A and 50+50 A respectively, so they draw more power from the battery. A direct comparison with the low-voltage alternative: the SUN-15K-SG05LP3-EU-SM2 (item 2060) at the same rating gives a double peak, an array of up to 30 kW and works with cheaper 48 V batteries, but weighs 51.9 kg, is louder and demands 70 to 95 mm² cable. Choosing between HP3 and LP3 means choosing between a dearer battery with a simple power installation and a cheaper battery with a heavy one, and the right answer depends on the capacity you plan: from 20 kWh upward the high-voltage scheme usually wins.

Tell us the storage capacity you plan and the system voltage it will have, and we will check whether this model can unlock its full fifteen kilowatts on your bank.