100/125 kW PCS + MPPT + STS · Modular C&I Power Conversion

Highlights

• Modular, not all-in-one. The PCS is the battery inverter. PV connects through a separate MPPT module on the DC side, and backup and generator switching run through a separate STS. Build only what the site needs: PCS only, PCS + MPPT, PCS + STS, or all three.
• 100 or 125 kW per PCS, 2.5 MW per system. One STS carries up to five 100 kW or four 125 kW PCS (500 kW). Five STS in parallel reach 2.5 MW with 25 × 100 kW or 20 × 125 kW PCS.
• High-voltage battery window. Each PCS takes one 630–1000 V lithium battery input at up to 175 A (100 kW) or 200 A (125 kW), with up to 16 battery clusters in parallel.
• Up to 200 kWp of PV per MPPT module. 160 kW max. input, eight trackers at 40 A each, 800 V max. input voltage and more than 99.9% MPPT efficiency. The module feeds the PCS over a 630–1000 V DC link.
• Under-10 ms backup switching. The STS has separate grid, load and generator ports, each rated 500 kW.
• EMS built in. Zero export or an export limit (via a CT, a meter or the STS’s internal CT), grid peak shaving and time-of-use charging and discharging, with no separate EMS. Monitoring runs through Deye Cloud.
• IP65 PCS and MPPT modules with intelligent air cooling, rated from −40 °C to +60 °C. The PCS derates above 45 °C.
• Warranty. The PCS carries a standard 5-year warranty that can be extended (Deye’s AU PCS brochure, September 2026). The STS carries 10 years, and the MPPT module 10 years under Deye’s AU/NZ SUN Series warranty (V2.17).

The three modules

Module	Model	Rating	IP	W × H × D	Weight
PCS	SUN-100K / SUN-125K-PCS01HP3-AU	100 / 125 kW AC · 630–1000 V battery	IP65	543 × 310 × 775 mm	81.86 kg ¹
MPPT	SUN-MPPT-L01-AU-AM8	200 kWp PV · 8 trackers	IP65	543 × 198 × 700 mm	41.75 kg
STS	SUN-STS500L	500 kW per port · <10 ms	IP20	543 × 575 × 671 mm	108 kg

¹ From Deye’s AU brochure (2026-09-03), AU catalogue and 2026-09-15 EN manual. The older PCS + MPPT + STS manuals (AU 2025-09-30, EN 2025-12-26) print 70.35 kg.

Battery pairing

• BOS-B Pro-A3 indoor rack. Deye’s AU PCS brochure allows 14–16 packs per cluster on-grid and 15–16 packs off-grid for a PCS without an MPPT module. With an MPPT module, it allows 16 packs for a PV open-circuit voltage up to 800 V, 15 packs up to 750 V and 14 packs (on-grid only) up to 700 V. A 16-pack cluster (819.2 V nominal, 257.23 kWh) has an operating range of 665.6–934.4 V, which sits wholly inside the PCS’s 630–1000 V battery window. Scaled from the manual’s table (41.6 V per pack at the bottom of the range), 15 packs bottom out at 624 V and 14 packs at 582.4 V, both below 630 V. Confirm any cluster shorter than 16 packs with Suncloud. Each cluster takes one BOS-B-AP-A accessory kit, the version made for the 100/125 kW PCS.
• GE-F256 outdoor cabinet. Deye’s AU ORION E brochure lists the GE-F256-BC-2-A3 cabinet with a SUN-125K-PCS01HP3-AU, the SUN-MPPT-L01-AU-AM8 and the SUN-STS500L as a 125 kW / 257 kWh, two-hour system. Each cabinet takes one GE-F256-AP-C accessory kit, the kit made for the 100/125 kW PCS.
• Never with the BOS-B Pro-A3 outdoor cabinet. Deye’s September 2026 guidance allows only a hybrid inverter with that cabinet, never a standalone PCS.

Design rules

• Grid connection in Australia. Deye’s AU brochure, AU manual and AU catalogue list AS/NZS 4777.2 as the PCS’s grid regulation. For AS/NZS 4777.2:2020 compliance, the AU manual says to select the Australia A, B or C or New Zealand grid code. The DRM port supports DRM0 only. Before you quote a grid-connected site, confirm the grid-connection approval for the exact PCS variant with Suncloud.
• PV open-circuit voltage. The PV string open-circuit voltage must stay below the battery cluster voltage at 0% SOC and within the MPPT module’s 800 V maximum. This is why the PV string design sets the minimum pack count per cluster.
• Off-grid loads. For stable off-grid operation, keep the continuous off-grid load below 70% of the PCS rated power. Deye rates the PCS for an instantaneous peak of up to 200% of rated power, and quotes 2 × peak output for 12 seconds in off-grid mode. Where several STS are paralleled through their load terminals, the off-grid load is limited to 700 kW.
• More than three clusters. When more than three battery clusters connect in parallel, do not daisy-chain them. Bring each one to a DC busbar and run a single connection from the busbar to the PCS.
• Parallel PCS. Every PCS in a parallel system must be the same model, and each PCS needs its own battery set.
• DC and AC protection. Fit a separate DC over-current protector or disconnect between the battery and each PCS, unless the battery has a readily accessible internal DC breaker. Without an STS, fit a separate AC breaker between each PCS and the grid; Deye recommends 225 A / 400 V. The recommended AC and battery cable is 70 mm² for the 100 kW and 95 mm² for the 125 kW.
• PV side. Deye requires a PV junction box with surge protection, and recommends a DC breaker between the PV strings and the MPPT module. Do not ground PV+ or PV−, and do not connect PV modules that can leak current to earth.
• Generator without an STS. For off-grid sites without an STS, the PCS’s Gen On-Grid mode lets a diesel generator connect to the PCS AC port as the grid source. Deye requires reverse-power protection so the PCS cannot back-feed the generator.
• Siting. Install the modules sheltered from direct sunlight, rain, snow and lightning; the STS is only IP20. Keep at least 300 mm between a BOS-B Pro-A3 rack and the PCS. If the STS and PCS communicate over Ethernet cable, keep the run under 10 m.
• MPPT module version. Use the SUN-MPPT-L01-AM8 with the PCS01HP3. Deye’s newer PCS + ACDC + MPPT manual says the SUN-MPPT-L01-AM10 is not recommended with this PCS.

Figures are from Deye’s BOS-B Pro-A3 Solution Series brochure for the 100–125 kW PCS (AU, V1.0, 2026-09-03), the PCS + MPPT + STS user manuals (AU, V1.1.0, 2025-09-30; EN, V1.1.0, 2025-12-26), Deye’s AU product catalogue (v4.3, 2026, pp. 51–52), the BOS-B Pro-A3 user manual (EU/AU, V08, 2026-08-10), the ORION E GE-F128/F240/F256 + PCS 100–125 kW brochure (AU, V1.0, 2026-09-04) and Deye’s AU indoor/outdoor configuration list (V1.0, 2026-09-10). The AM10 note, the 81.86 kg PCS weight and the 160 kW MPPT input figure are also in the newer PCS + ACDC + MPPT user manual (EN, 2026-09-15 edition). The older PCSL01HP3 name, with different ratings, is from Deye’s 100 kW–2.5 MW C&I ESS brochure (V1.0, 2025-03-21). Where Deye’s documents differ (PCS weight, MPPT input power, STS switching time), the figure from the newest documents is shown first and the older figure is noted. The warranty is as listed in Deye’s SUN Series 10-year limited warranty for Australia and New Zealand (V2.17, July 2026, p.3), which lists SUN-100/125K-PCS01HP3-AU, SUN-MPPT-L01-AU-AM8 and SUN-STS500L. Deye’s AU PCS brochure (V1.0, 2026-09-03), which is newer, prints “Standard 5 years, extendable warranty” in its PCS table (p.5) and 10 years for the STS (p.4). Confirm the model suffix, grid-connection approval and cluster size with Suncloud before quoting.