Description

12kWh Three-Phase SRNE Solar System with 33.4kWh Lithium Battery Storage

System Overview

The 12kWh Three-Phase SRNE Solar System is a high-performance hybrid solar power solution designed for homes, businesses, offices, farms, workshops and other applications requiring reliable three-phase electricity and battery backup.

The system combines a 12kWh SRNE three-phase hybrid inverter, 22 × 635W Jinko bifacial monocrystalline solar panels, and 2 × 16.7kWh SRNE lithium batteries, providing a total nominal battery storage capacity of approximately 33.4kWh.

The solar array has a total installed capacity of:

22 × 635W = 13,970W

Total Solar PV Capacity: 13.97kWp

The battery bank provides:

2 × 16.7kWh = 33.4kWh

Total Battery Storage: 33.4kWh

This combination allows solar energy to supply loads during the day while excess available solar energy can be stored in the lithium batteries for use during periods of low solar production or grid interruptions.

1. SRNE 12kWh Three-Phase Hybrid Solar Inverter

The system is built around a 12kWh SRNE hybrid solar inverter, configured as a three-phase system.

The supplied model information identifies the SRNE HESP48120S200-H and specifies a 12,000W rated output, up to 24,000VA maximum output power, a 52.2A rated output current, and 2 MPPT trackers.

Specifications

• Brand: SRNE
• Capacity: 12kWh
• Configuration: Three Phase
• Rated output power: 12,000W
• Maximum output power: 24,000VA
• Rated output current: 52.2A
• Maximum output current: 54.4A
• MPPT trackers: 2
• Battery system: Low-voltage lithium battery
• Application: Hybrid solar, battery and grid operation

Advantages

• Provides reliable three-phase power for compatible loads
• Allows solar energy to be used directly by connected equipment
• Supports battery charging and energy storage
• Provides backup power when grid electricity is unavailable
• Two MPPT trackers help optimize energy harvesting from different PV strings
• Suitable for residential, commercial and small industrial applications
• High peak output capability helps accommodate demanding loads

Note: The uploaded document gives the above inverter electrical specifications but identifies the original configuration as a 48V single-phase unit. The three-phase configuration is the requested adjustment, so the exact three-phase SRNE model and its final electrical limits should be confirmed against the manufacturer’s datasheet before installation.

2. SRNE 16.7kWh Lithium Battery Bank

The system includes:

2 × 16.7kWh SRNE Lithium Batteries

Total nominal storage:

16.7kWh × 2 = 33.4kWh

The battery specification in the supplied document identifies the SRNE EOS battery platform as a low-voltage LFP battery with a 51.2V rated voltage, 314Ah rated capacity, approximately 16.07kWh battery power, 8,000-cycle lifespan, and up to 16 batteries in parallel.

For your requested configuration, the battery is described commercially as a 16.7kWh SRNE lithium battery.

Battery Features

• Brand: SRNE
• Capacity: 16.7kWh each
• Quantity: 2
• Total storage: 33.4kWh
• Battery chemistry: Lithium Iron Phosphate (LFP)
• Low-voltage battery architecture
• Built-in battery management and protection functions
• Wi-Fi and Bluetooth monitoring support on the referenced EOS platform
• Large LCD display on the referenced EOS platform
• IP65 protection on the referenced EOS platform
• Wall or floor mounting
• Plug-and-play installation
• Expandable battery architecture

The referenced SRNE EOS battery platform is specified as supporting up to 16 units in parallel, with a maximum expansion of 256kWh.

Advantages of the Lithium Battery Bank

• Provides substantial energy storage for night-time use
• Supplies backup energy during grid interruptions
• Stores surplus solar energy generated during the day
• LFP chemistry provides long cycle life
• Modular design allows battery expansion
• Suitable for daily solar charging and discharging
• Reduces dependence on grid electricity

3. Jinko 635W Bifacial Monocrystalline Solar Panels

The system includes:

22 × 635W Jinko Bifacial Monocrystalline PV Modules

Total solar generation capacity:

22 × 635W = 13,970W

Total PV Capacity: 13.97kWp

The specified Jinko modules feature:

• 635W rated power per panel
• N-type monocrystalline technology
• TOPCon technology
• Bifacial design
• 24% transfer efficiency
• 25-year warranty

These high-power panels provide substantial solar generation while the bifacial design can make use of suitable reflected light reaching the rear side of the modules.

Advantages

• High 635W output per module
• High-efficiency N-type TOPCon technology
• Bifacial energy-generation capability
• Suitable for large residential and commercial systems
• Fewer panels may be required compared with lower-wattage modules for the same PV capacity
• 25-year panel warranty

4. Aluminum Solar Mounting Structure

The system includes:

9 × Long Aluminum Mounting Rails

The supplied mounting specification describes the rails as standard aluminum long rails with corrosion resistance.

Advantages

• Lightweight
• Corrosion resistant
• Suitable for outdoor solar installations
• Provides secure support for the PV modules
• Designed for long-term solar installation

The final rail spacing and mounting arrangement should be determined according to the panel dimensions, roof/ground structure and manufacturer’s mounting requirements.

5. Solar PV Cabling

The system includes:

6.0mm² Solar PV Cable

• 100 meters

10mm² Solar PV Cable

• 80 meters

These cables are used for appropriate PV connections between the solar modules, combiner/protection equipment and inverter, according to the final system design.

The supplied document also includes the 35mm² battery cable for battery-to-inverter connections.

6. Battery Cable

35mm² Battery Cable

The battery cabling is provided for the connection between the lithium battery bank and the inverter.

For a two-battery installation, the final cable size, length, parallel configuration, protection and busbar arrangement should be confirmed according to the selected battery manufacturer’s installation requirements and the actual maximum battery current.

7. Three-Phase Automatic Changeover Switch

The system includes an:

Automatic Changeover Switch

For the revised three-phase configuration, the changeover system should be specified and installed as a three-phase automatic changeover switch appropriately rated for the system’s maximum operating current.

The original document specifies a 63A double-pole single-phase changeover switch; therefore, that original rating should not simply be carried over to the revised three-phase system.

8. DC Protection

The system includes:

125A Double-Pole DC Breaker

The DC breaker provides isolation and overcurrent protection for the applicable DC circuit.

It assists with:

• PV circuit protection
• Safe system isolation
• Maintenance
• Electrical fault protection

The supplied specification identifies a 125A double-pole DC breaker.

9. Surge Protection

The system includes a:

Surge Protector

The surge protection device helps protect sensitive electrical and electronic equipment from transient voltage surges.

This is particularly important for solar installations where PV modules and external electrical wiring are exposed to outdoor electrical conditions.

10. Digital Automatic Voltage Regulator

A Digital Automatic Voltage Regulator is included to help regulate the applicable incoming electrical supply and provide improved voltage stability for connected equipment.

11. 12-Way Solar Combiner Box

The system includes:

1 × 12-Way Combiner Box

The combiner box provides an organized point for combining and protecting appropriate PV strings before connection to the inverter.

It helps with:

• PV string organization
• Circuit isolation
• Protection
• Easier maintenance
• Cleaner installation

The supplied system specification includes a 12-way combiner box.

12. Cable Management

The system includes:

• 4 × 4 metallic trunking
• 25mm flexible conduit
• Cable tapes
• Cable ties
• Cable lugs

These accessories assist with safe cable routing, organization and termination throughout the installation.

13. System Energy Flow

During the Day

The 13.97kWp solar array generates electricity:

22 × 635W Jinko Panels → SRNE Hybrid Inverter → Three-Phase Loads

Solar energy is used to power connected loads directly.

Where solar production exceeds instantaneous consumption, available excess energy can be directed toward charging the lithium battery bank, subject to the inverter and battery charging limits.

When Solar Production Is Low

The system can utilize stored energy:

33.4kWh Lithium Battery Bank → SRNE Inverter → Three-Phase Loads

This allows stored solar energy to support the premises during periods of reduced solar production.

During Grid Outages

The inverter can use the battery bank to supply supported backup loads, subject to the inverter’s backup capability, battery state of charge and the actual connected load.

14. Key Advantages of the Complete System

1. High Solar Generation Capacity

The 13.97kWp solar array provides substantial daytime renewable energy generation.

2. Large Battery Storage

With 33.4kWh of requested lithium storage, the system has substantial energy-storage capacity for backup and night-time use.

3. Three-Phase Operation

The requested three-phase configuration makes the system suitable for premises with three-phase electrical requirements.

4. High-Power 635W Solar Modules

The 635W Jinko N-type TOPCon bifacial panels provide high power output per module and efficient use of available installation space.

5. Long-Life LFP Battery Technology

The referenced SRNE EOS battery platform uses LFP chemistry and specifies an 8,000-cycle lifespan, providing a long-cycle energy-storage solution.

6. Expandable Battery Storage

The referenced SRNE battery platform supports parallel expansion, allowing additional storage capacity to be added where supported by the final system configuration.

7. Smart Battery Monitoring

The referenced battery platform supports Wi-Fi and Bluetooth monitoring and provides real-time data through an application.

8. Outdoor Protection

The referenced EOS battery platform has an IP65 rating, providing protection against dust and water ingress when properly installed.

9. Automatic Power Switching

The automatic changeover system can facilitate switching between available power sources, subject to the final three-phase changeover specification.

10. Comprehensive Electrical Protection

The system incorporates DC protection, surge protection, PV combiner equipment, voltage regulation and appropriate cable management.

11. Long-Term Solar Investment

The combination of high-output solar panels, lithium storage and a hybrid inverter provides a complete renewable energy and backup solution.

15. Complete System Specification

Component	Revised Specification
Solar System	12kWh SRNE Three-Phase Hybrid Solar System
Hybrid Inverter	SRNE 12kWh / 12,000W Three-Phase Hybrid Inverter
PV Modules	22 × 635W Jinko Bifacial Monocrystalline
Total PV Capacity	13.97kWp
Lithium Batteries	2 × 16.7kWh SRNE Lithium
Total Battery Storage	33.4kWh
Solar PV Cable	6.0mm² – 100m
Solar PV Cable	10mm² – 80m
Battery Cable	35mm²
Changeover	Three-Phase Automatic Changeover Switch
DC Protection	125A Double-Pole DC Breaker
Surge Protection	Surge Protector
Voltage Regulation	Digital Automatic Voltage Regulator
PV Combiner	12-Way Combiner Box
Mounting Rails	9 × Long Aluminium Rails
Trunking	4 × 4 Metallic Trunking
Conduit	25mm Flexible Conduit
Accessories	Tapes, Cable Ties & Cable Lugs
Solar Panel Warranty	25 Years
Complete System Warranty	5 Years
Installation	Free Installation Countrywide
Delivery	Free Delivery Within Nairobi

The source specifies a 10-year warranty for complete solar systems, free installation countrywide and free delivery within Nairobi.

Final System Description

The 12kWh Three-Phase SRNE Solar System combines a 12kW SRNE hybrid inverter, 13.97kWp of 22 × 635W Jinko bifacial N-type TOPCon solar panels, and 33.4kWh of SRNE lithium battery storage using two 16.7kWh batteries. The system is supported by aluminium mounting rails, PV cabling, battery cabling, a three-phase automatic changeover system, DC protection, surge protection, voltage regulation and a 12-way PV combiner box.

It is designed to provide daytime solar generation, substantial battery energy storage and three-phase backup power, making it suitable for residential, commercial, agricultural and other applications requiring reliable renewable energy and energy storage.

 

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