Distribution Boxes Built From the Customer Single-Line Diagram
The customer, a Mongolian system integrator, sent single-line diagrams for two hybrid systems: a 30kW system with three 10kW three-phase inverters and a 184.32kWh LFP battery bank, and a 20kW system with two inverters and 92.16kWh of storage.
TPKELE builds the distribution layer between the battery, inverters and loads: battery-side DC boxes with 300A DC MCCBs, and AC boxes with a 4P breaker and 4P surge protector on every inverter output. The inverters, batteries and PV modules are customer-supplied.
Battery, Hybrid Inverters and Distribution Boxes on One Wall
Wall layout drawings from the customer. Each inverter output gets its own 4P breaker and SPD in the AC box, and the battery bank connects through the DC box.
What Goes Into Each Box
Distribution box contents from the project bill of materials, followed by the customer-supplied system equipment for context.
DC-01 / DC-02 Battery-Side DC Distribution Box
2P 300A DC MCCB · 12× PG21 cable glands per boxIsolates and protects the 48V LFP battery bank on the DC side of the hybrid inverters.
AC-01 AC Distribution Box — 30kW system (11 sets)
3× 4P 25A AC MCB · 6× 2P 16A AC MCB · 3× 4P 20kA AC SPD · PE busbar · 6× PG21One 4P breaker and one 4P SPD per inverter output, plus six 2P outgoing feeders, matching the customer single-line diagram.
AC-02 AC Distribution Box — 20kW system
2× 4P 25A AC MCB · 2× 4P 20kA AC SPD per boxThe same per-inverter protection logic applied to the two-inverter system.
Hybrid Inverters
SUN-10K-SG05LP3-EU-SM2 · 10kW three-phase · 3 units (30kW) / 2 units (20kW)Customer-supplied equipment shown in the single-line diagram.
Battery Storage
B-LFP48-300E · 12× 15.36kWh = 184.32kWh (30kW) / 6× 15.36kWh = 92.16kWh (20kW)Customer-supplied equipment shown in the single-line diagram.
Solar PV Array
8× 630W modules per string · 4 strings per system shownCustomer-supplied equipment shown in the single-line diagram.
What Was Built Specifically for This Project
Built to the customer drawing
Box contents follow the customer single-line diagram: one 4P breaker and one 4P SPD per inverter output, plus the outgoing feeders.
300A battery-side DC isolation
Each DC box carries a 2P 300A DC MCCB between the LFP battery bank and the hybrid inverters.
Repeatable AC-01 build
The 30kW AC box is built as 11 identical sets, so every site gets the same layout, labeling and spare parts.
Earthing included
AC-01 boxes include a PE busbar for SPD and enclosure earthing.
Cable entry planned
PG21 cable glands are specified per box: 12 on each DC box, 6 on each AC-01 box.
UV-printed front panel
Project panels are UV-printed with the box type and TPKELE branding.
TPKELE Products and Services in This Project
Standard TPKELE breakers and surge protectors where the specification matches a product family, assembled into boxes built to the customer drawing.
Battery-Side DC Distribution Box
The 300A MCCB is above the TPKELE DC MCB range (up to 125A) and is specified per project. The enclosure, layout and wiring are built to the customer drawing.
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AC MCB — 4P 25A
Three-phase + neutral protection for each inverter AC output.
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AC MCB — 2P 16A
Two-pole protection for the outgoing feeders in the AC-01 box.
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AC 4P SPD — 20kA
Four-pole surge protection on each inverter AC output (L1, L2, L3, N).
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AC Distribution Box Assembly
Enclosure, component layout, PE busbar, cable glands and UV-printed front panel, assembled at the TPKELE factory.
View details →Box-by-Box Breakdown and Power Path
DC-01 / DC-02
2P 300A DC MCCB + 12× PG21 per box
AC-01 (30kW, 11 sets)
3× 4P 25A AC MCB + 6× 2P 16A AC MCB + 3× 4P 20kA AC SPD + PE busbar + 6× PG21
AC-02 (20kW)
2× 4P 25A AC MCB + 2× 4P 20kA AC SPD
Power path
PV strings + LFP battery → DC box → 10kW hybrid inverters → AC box (4P MCB + 4P SPD per inverter) → 2P 16A outgoing feeders
Explore Custom Distribution Boxes
PV combiner, DC, AC and ATS boxes built to your drawing
Learn more →DC Distribution BoxBattery-side and DC bus distribution
Learn more →AC Distribution BoxInverter AC output and feeder distribution
Learn more →AC 4P SPDFour-pole surge protection used in this project
Learn more →Building a Similar Solar + Battery Storage System?
Send your single-line diagram, inverter model and quantity, battery voltage and the number of outgoing circuits. TPKELE will propose a box layout and bill of materials for your review.