A Multi-Layer Solar, Storage and Distribution Requirement
The buyer-provided SIRDC 19/2026 technical specification is not limited to solar modules. It combines PV generation, three inverter configurations, lithium battery storage, battery-side hardware, DC and AC protection, automatic changeover, distribution boards and installation accessories.
For TPKELE, the strongest fit is the protection and switching layer: the DC breaker and DC SPD ahead of the inverter, AC breakers and AC SPDs on the output / distribution side, and automatic transfer equipment where the inverter system changes between available power sources.
The Project Starts With the Whole System — Not Just the Breakers
These are the major system categories visible in the supplied procurement pages. Showing them together makes it clear how the protection devices participate in the wider solar and battery architecture.
Solar PV Modules
600W · 55V · Monocrystalline · Split Cell · BifacialThe procurement sheet also requests a consignment-based conformity assessment certificate on delivery.
Hybrid Inverter — 3 Phase
12kVA · Inbuilt MPPT · 2 MPPT or more · IP65 or betterDeye / Sunsynk or equivalent; net metering, auxiliary load function and web/mobile monitoring are listed in the buyer specification.
Hybrid Inverter — Single Phase
8kVA · Inbuilt MPPT · 2 MPPT or more · IP65 or betterDeye / Sunsynk or equivalent; net metering, auxiliary load function and web/mobile monitoring are listed in the buyer specification.
Off-Grid Inverter
5kVA · Inbuilt MPPT · Single PhaseDeye / Sunsynk or equivalent with web/mobile monitoring as stated in the procurement sheet.
Lithium Battery Storage
48V · 200Ah · At least 9.6kWh usable energyPower jumpers, lugs, communication cables and racking are included in the battery requirement.
Battery-Side Components
250A battery fuse · 300A bus bar · 35mm / 25mm DC battery cablesThese support the battery connection and DC distribution side of the system.
Protection & Switching
63A 2P DC breaker · DC SPD · 63A AC breakers · AC SPD · Automatic changeoverThe buyer lists both single-phase and three-phase AC / transfer configurations.
Distribution & Installation
12-way / 18-way PVC DB · rails · trunking · conduit · couplings · saddlesInstallation hardware and battery racking are part of the wider project procurement scope.
Where Protection and Automatic Transfer Sit in the Energy Path
The diagram below is a conceptual interpretation of the buyer procurement scope. It shows the functional relationship between PV generation, the protection layer, inverter / battery storage, AC output protection, automatic changeover and final distribution. It is not a final single-line diagram.
Battery storage interfaces with the hybrid / off-grid inverter section; exact connection topology is to be confirmed by the final system design.
Procurement Requirements That Align With TPKELE Product Families
Where the procurement wording directly matches a TPKELE product family, the match is shown as Product family fit. Items that still require function, voltage, poles or transfer-logic confirmation are labelled Technical confirmation.
DC MCB — 63A Double Pole
PV-array DC isolation and overcurrent protection. Final model still depends on confirmed PV string voltage and fault conditions.
View TPKELE product family →
DC SPD
DC-side surge protection for the PV / inverter interface. System voltage and surge-protection design must be confirmed before selection.
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AC MCB — Single Phase
Two-pole protection and isolation for the single-phase inverter output / distribution circuits specified by the buyer.
View TPKELE product family →
AC MCB — Three Phase
Three-phase output / distribution protection for the three-phase portion of the project.
View TPKELE product family →AC SPD — Single & Three Phase
AC-side surge protection for both single-phase and three-phase distribution sections.
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Automatic Transfer — Single Phase
TPKELE automatic transfer switch families provide automatic source transfer, but final source pairing, neutral arrangement and inverter compatibility must be checked.
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Automatic Transfer — Three Phase
Three-phase ATS configuration can align functionally with the changeover requirement after voltage, poles, transfer logic and neutral switching are confirmed.
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AVS / Voltage Protection
TPKELE has single- and three-phase voltage-protection families, but this is not presented as a direct model match until the buyer AVS functions and thresholds are confirmed.
View TPKELE product family →Understand the Whole Project Without Pretending Every Item Is a TPKELE Product
Featured TPKELE fit
DC MCB, DC SPD, AC MCB, AC SPD, automatic transfer switch families and possible AVS / voltage-protection matching.
Other procurement items
Solar modules, inverters, lithium batteries, battery fuse / holder, busbar, distribution boards, mounting rails, solar and battery cables, trunking, conduit and installation hardware.
The presence of an item in the procurement document does not mean TPKELE manufactures or supplied that item. This page focuses on system understanding and the TPKELE categories that can be technically matched.
Six Engineering Points the Procurement Pages Do Not Fully Resolve
PV string voltage
The procurement lists 600W / 55V modules but does not state final string count or maximum PV array voltage. Confirm string Voc and inverter DC input limits before selecting the DC breaker and DC SPD.
AC system voltage & phase
The project includes both single-phase and three-phase inverter systems. Confirm the actual AC voltage and neutral arrangement for each protection and transfer circuit.
Breaking capacity
The buyer specifies 63A breakers, but the required short-circuit breaking capacity is not stated in the supplied pages. Verify it against the prospective short-circuit current at each installation point.
SPD coordination
Confirm DC Uoc, AC system voltage, earthing arrangement and the wider lightning / surge-protection design before selecting SPD type and ratings.
Automatic transfer logic
The specification asks for automatic single- and three-phase changeover compatible with inverter output. Confirm source pair, pole count, neutral switching, transfer logic and inverter-generator / grid behaviour.
AVS function
The procurement names Digital DIN AVS devices but the supplied pages do not define trip thresholds, delay logic or complete functional requirements. Match only after those details are confirmed.
Explore TPKELE Products and Technical Solutions
Working on a Similar Solar PV + Battery Storage Project?
Send the PV string data, inverter model / output voltage, single- or three-phase configuration, battery architecture and source-transfer requirement. TPKELE can help identify the protection and switching product families that deserve technical evaluation.