Technical Document of 36kW/60kWh Integrated PV Energy Storage Solution for Peruvian Aquaculture Farms
Operation Mechanism of 36kW/60kWh Integrated PV & Energy Storage System
I. Introduction: Power Supply Dilemmas & Breakthrough Demands of Peru’s Aquaculture Industry
Schematic Diagram of 36kW/60kWh Integrated PV & Energy Storage System Configuration
Topological Diagram of 36kW/60kWh Integrated PV & Energy Storage System
II. Overall System Configuration & On-Site Deployment Specification of Complete Topology
Inverter Equipment
Three SW48120V150-500P 12kW single-phase hybrid PV-energy storage inverters are wall-mounted in layered arrangement. Each unit has a rated output of 12kW, and the AC sides of the three inverters are paralleled to deliver a total rated power of 36kW. The hardware supports parallel expansion of up to six units to form a 72kW three-phase system, reserving space for future production capacity upgrades. On-site photos show the three inverters uniformly installed on the upper blue workshop wall. DC cables run downward to connect to the energy storage battery pack, while AC cables converge horizontally to the central AC power distribution protection box. Strong and weak currents are wired in separate zones, with red/black DC cables physically separated from green AC cables to eliminate risks of AC-DC electromagnetic interference.
12kW Single-Phase Hybrid PV & Energy Storage Inverter
Energy Storage Unit
Four SW-WH-48300 integrated energy storage lithium batteries with casters are placed on the ground. Each unit is rated 51.2V/300Ah with a nominal capacity of 15kWh. The four batteries are paralleled on the DC side and collectively connected to the DC bus of the three inverters, delivering a total energy storage capacity of 60kWh. Caster-equipped cabinets facilitate displacement for maintenance and battery equalization inspection. All batteries are centrally arranged under the inverters to shorten DC cable laying distance and reduce DC line loss.
PV Array Configuration
630W N-type TOPCon high-efficiency modules are adopted. Each inverter is equipped with two independent MPPT channels, with nine modules connected in series per channel. Each inverter connects two strings of nine 630W modules, corresponding to a single-unit PV installed power of 11.34kW and a total PV installed capacity of 34.02kW across three inverters. In the system schematic, black cables represent PV DC input loops. Every two module strings are independently connected to one MPPT channel, and the two PV circuits are fully electrically isolated. Shading on one string will not affect the power generation of the other. Based on Peru’s annual effective sunshine duration of 5 hours, the system achieves a daily power generation of 170kWh, with daytime solar output fully covering basic loads including incubation, heating and ventilation equipment.
System Operation Architecture
A four-energy-source coordinated dispatch architecture compatible with both grid-tied and off-grid modes. Green AC cables enable interconnection among utility grid, inverter output and farm loads, supporting intelligent switching of four energy sources: PV, energy storage, municipal power and diesel generators. Four operating modes are available: grid-tied self-consumption, off-grid island power supply, peak-valley electricity price arbitrage and battery-free pure PV operation. Two levels of power distribution protection cabinets are equipped on site: a PV DC combiner box on the left and an AC grid-tie point protection box in the middle, fitted with graded short-circuit, overload and leakage protection devices to achieve three-stage electrical safety isolation for the PV side, inverter side and load side.
36kW/60kWh PV & Energy Storage System for Poultry Farms in Peru
III. Compatibility Verification of Series-Parallel Voltage for PV Arrays
Nine modules are connected in series per channel to access the inverter MPPT channel. Combined with module electrical parameters and inverter operating voltage range, verification is conducted to confirm voltages under standard, high and low temperature extreme conditions all fall within the safe tracking range of equipment, eliminating power generation failures caused by overvoltage or undervoltage.
(I) Benchmark Parameters of Core Equipment
12kW Hybrid Inverter MPPT Hardware Parameters: Dual independent MPPT controllers with an MPPT operating voltage range of 90V~500V DC; maximum allowable open-circuit voltage per module string: 500V DC; maximum input current per MPPT channel: 22A; maximum PV input power per channel: 9kW.
Electrical Parameters of 630W N-type TOPCon Modules (STC Standard Test Conditions): Peak power Pmax=630W, peak operating voltage Vmpp=42.0V, open-circuit voltage Voc=50.3V; open-circuit voltage temperature coefficient: -0.24%/℃; power temperature coefficient: -0.29%/℃; short-circuit current temperature coefficient: +0.04%/℃; operating temperature range: -40℃~70℃; maximum system withstand voltage of modules: 1500V DC.
(II) Voltage Verification under Standard Ambient Temperature Conditions
Total voltage parameters for nine series-connected modules: Total series peak operating voltage Vmpp(total) = 42.0V × 9 = 378V Total series open-circuit voltage Voc(total) = 50.3V × 9 = 452.7V 378V falls within the inverter’s 90~500V MPPT tracking range, enabling the inverter to track the maximum PV power with 99.9% high efficiency at all times. 452.7V is far below the inverter’s 500V maximum open-circuit voltage limit, with no static overvoltage risks.
(III) Verification under Low-Temperature Extreme Conditions (Minimum -10℃ on Plateaus)
Standard test temperature is 25℃, with a low-temperature temperature difference ΔT=35℃. Module open-circuit voltage rises in low-temperature environments: Single-module low-temperature open-circuit voltage = 50.3 × (1 + 0.24% × 35) = 50.3 × 1.084 = 54.525V Total open-circuit voltage for nine series modules = 54.525 × 9 = 490.73V 490.73V ＜ 500V equipment withstand voltage limit. The inverter will not trigger overvoltage protection in cold plateau winters, allowing continuous stable power generation of the array.
(IV) Verification under High-Temperature Extreme Conditions (45℃ in Coastal Summers)
High-temperature temperature difference ΔT=20℃, and module open-circuit voltage decreases with rising temperature: Single-module high-temperature open-circuit voltage = 50.3 × (1 - 0.24% × 20) = 50.3 × 0.952 = 47.886V Total open-circuit voltage for nine series modules = 47.886 × 9 = 430.97V 430.97V still lies within the standard 90~500V MPPT range. The inverter can normally capture maximum power under high temperature and strong sunlight without sharp efficiency attenuation caused by excessively low voltage.
(V) Current & Power Bearing Capacity Verification
Single-module peak operating current Imp=15.01A, and current remains consistent within the nine-module series branch. The MPPT channel input current of 15.01A is lower than the equipment’s 22A maximum current limit. The single-circuit PV power of 11.34kW is evenly distributed across two MPPT channels with balanced controllable single-channel loads. The overall PV input power fully matches the hardware load capacity of the inverter, eliminating hidden dangers of overcurrent and overpower.
IV. Technical Advantages Analysis of Core Equipment
(I) 630W N-type TOPCon High-Efficiency PV Modules: High Power Output & Long-Term Stable Generation
Boost Daytime Power Generation via High Conversion Efficiency
The maximum cell conversion efficiency reaches 23.3%. N-type cells feature superior attenuation performance compared with traditional P-type modules: power attenuation is only 1% in the first year and 0.4% annually thereafter. A 12-year product warranty and 25-year linear power warranty are provided. After 25 years of operation, the modules retain 89.4% of their original power output for stable long-term power generation revenue. Matched with inverters equipped with dual independent MPPT channels, the modules maximize solar energy absorption under complex light conditions including weak morning sunlight, midday intense radiation and cloud shading, stably generating 170kWh clean power daily to directly replace expensive municipal electricity.
Low Attenuation Output Adaptable to Variable Light Conditions
The modules deliver outstanding low-light response, with higher output power than conventional modules under low irradiation at dawn and dusk. The power temperature coefficient is as low as -0.29%/℃, leading to milder power attenuation in high temperatures and stronger year-round power generation stability, suitable for outdoor farming environments with drastic temperature fluctuations across Peru’s plateaus and coastal regions.
(II) SW48120V150-500P 12kW Single-Phase Hybrid Inverter: Core Hub for Uninterrupted Farming Power Supply
Dual Independent MPPT Topology Adaptable to Multi-Branch PV Input
The equipment integrates two fully independent MPPT power conversion circuits, corresponding to two PV strings per inverter in the schematic diagram. The two PV arrays are electrically isolated; shading or maintenance on one side will not interfere with normal power generation of the other. The maximum AC-DC conversion efficiency hits 93%, cutting energy loss during light-to-AC conversion and maximizing on-site PV self-consumption to reduce power bills. Three inverters on site are uniformly paralleled to the AC bus, with synchronized phase, voltage and frequency for even power distribution. Shutdown of one unit will not affect the load operation of the other two.
10ms UPS-Level Seamless Switching to Eliminate Farming Losses from Incubation Power Cuts
A bypass inverter fast-switching architecture is customized to meet the zero-power-cut demand of incubation equipment. The internal power devices disconnect the municipal power circuit and activate the energy storage inverter circuit within 10ms upon grid voltage drop, short-circuit tripping or scheduled blackouts. No power outage gap or voltage drop impact occurs. Incubator temperature control, heating lamps and ventilation equipment operate continuously without interruption, completely avoiding farming losses from temperature fluctuations and converting power stability into guaranteed production.
200% Short-Term Peak Load Capacity Compatible with Inductive Farming Loads
It supports short-term output of 200% rated power, capable of carrying twice the rated impact load for 5 seconds to fully cover startup inrush currents of inductive loads such as fans, mixing motors and water circulation pumps. A dry contact startup interface for diesel generators is reserved for automatic linkage with backup units. When PV output is insufficient during consecutive rainy days or battery power is depleted, the generator automatically starts for supplementary power, establishing triple power supply backup: PV + energy storage + diesel.
Intelligent Multi-Energy Dispatch Algorithm & Graded Power Distribution Protection
Built-in four-energy-source coordinated dispatch logic enables automatic switching between four operation strategies: PV priority, energy storage voltage stabilization, municipal power backup and generator supplementary power. Multiple communication interfaces including WiFi, RS485 and GPRS are integrated for remote monitoring of power generation, battery residual capacity and load power, supporting OTA remote firmware upgrades. Dedicated AC/DC power distribution cabinets are deployed on site, fitted with graded DC circuit breakers, AC molded case switches and lightning protection modules to deliver three-stage short-circuit, overcurrent and surge protection for PV, batteries and loads, complying with South American low-voltage electrical safety standards.
(III) SW-WH-48300 15kWh Integrated Energy Storage Lithium Battery: DC Bus Parallel Energy Storage Unit
Three-Tier Electrical Safety Protection Architecture Adaptable to Long-Term Cycling Scenarios
A three-layer safety protection framework covering cell, module and complete unit is adopted, with a high-precision BMS (Battery Management System) built-in to collect real-time voltage and temperature data of every cell string. Comprehensive hardware protection covers overvoltage, undervoltage, overcurrent, short circuit and overtemperature. Cells support over 3,000 complete charge-discharge cycles, fitting the round-the-clock charge-discharge demands of farms. The BMS of four paralleled batteries conducts coordinated equalization to eliminate voltage differences between individual units and extend the service life of the entire energy storage system.
Standardized DC Parallel Topology to Reduce Cable Losses
Four energy storage batteries are uniformly paralleled to a shared 48V DC bus, then separately wired to the DC input terminals of the three inverters. A short-distance copper bar centralized combiner design is adopted for on-site deployment, drastically shortening DC cable length and line voltage drop to minimize DC transmission loss. The caster-integrated cabinet facilitates on-site displacement and offline maintenance of single units. New batteries can be directly paralleled for capacity expansion without modifying the original DC bus architecture.
Stable Operation under Wide Temperature Range & Multi-Device Linked Communication
Operating temperature range: -20℃~60℃, humidity ＜95% without condensation, suitable for altitudes up to 4,000m, enabling stable deployment in both plateau and coastal farming zones across Peru. Dual CAN/RS485 communication interfaces exchange real-time charge-discharge power and residual capacity data with the three inverters. The system automatically adjusts PV charging and load discharging power based on remaining battery capacity to prevent overcharging and overdischarging.
V. Full-Time Intelligent System Operation Logic (Combined with Complete Topology)
(I) Sunny Daytime: PV Priority for Self-Consumption to Cut Municipal Power Consumption
During sufficient sunlight, DC power generated by the 630W module arrays is transmitted to inverters via independent MPPT channels. Converted AC power is first supplied to core loads including incubators, heating lamps and ventilation equipment. When PV output exceeds load consumption, surplus electricity is stored in four paralleled energy storage batteries through red DC buses. When cloud shading weakens sunlight and reduces PV power output, the energy storage system discharges synchronously for supplementary power to maintain steady power supply for loads. The daily 170kWh power generation fully covers all daytime production electricity demand, sharply reducing procurement of expensive municipal power and directly cutting farming operating costs.
(II) Grid Fault / Instant Voltage Fluctuation: Millisecond Switching for Independent Island Load Operation
In cases of grid voltage drift, short-circuit tripping or scheduled power rationing, the inverter internal bypass switch rapidly disconnects the green municipal power circuit and switches to PV + energy storage island power supply mode. No power interruption occurs throughout the switching process, allowing constant-temperature equipment to run continuously and preventing embryo and chick deaths from abrupt temperature changes. The three-inverter parallel architecture evenly distributes load power; if one unit malfunctions, the remaining two can bear core loads, mitigating operational risks caused by unstable grids from two dimensions.
(III) Nighttime / Consecutive Rainy Days: Energy Storage as Backup for 24-Hour Production
After sunset with no sunlight or during prolonged rainy days with nearly zero PV output, the 60kWh energy storage system releases power through the DC bus, which is synchronously converted into AC power by the three inverters to continuously supply nighttime heating and ventilation equipment. When battery power approaches the lower limit, the system sends dry contact signals to automatically activate the diesel generator, which supplies loads while recharging batteries to achieve uninterrupted power supply throughout the full production cycle. Incubation cycles will not be disrupted by weather or grid power rationing.
(IV) Long-Term Intelligent Optimization: Peak-Valley Arbitrage & Modular Expansion for Business Growth
The system automatically optimizes energy strategies based on local electricity price periods: the energy storage system is charged by municipal power during off-peak low-price hours, while loads fully rely on PV and stored energy during high-price peak hours to avoid costly peak-period power bills. Surplus PV power can be fed back to the grid to generate extra revenue. All equipment adopts standardized modular design. Inverters and batteries can be paralleled for capacity expansion in later stages. When farms expand or add new incubation workshops later, the system can be upgraded simply by adding corresponding equipment, with original complete power distribution and bus architectures fully reusable without large-scale reconstruction.
PV Power Station for Farms in Peru
VI. Comprehensive Value Analysis of the Solution
(I) Production Safety Value: Multi-Layer Redundant Power Supply Eliminates Fatal Risks of Power Cuts
Incubation and brood rearing are the core profit-generating links of the farming industry, and power outages equal direct losses. Supported by a triple hardware redundant architecture — dual MPPT PV redundancy, three parallel inverters and four paralleled energy storage batteries — plus the 10ms seamless island switching function, this system thoroughly addresses blackouts and voltage fluctuations of Peru’s weak grids. It guarantees constant incubation temperature, greatly improves chick survival rates and avoids heavy economic losses from single power failures, converting power stability into consistent farming revenue. Graded complete power distribution protection on site further lowers risks of short-circuit and leakage faults, with multiple electrical safeguards protecting equipment and farming production safety.
(II) Cost Reduction Value: Clean Energy Replaces Expensive Municipal Power to Boost Profit Margins
Relying on the daily 170kWh clean power output of 630W high-efficiency modules, the system cuts municipal power procurement by over 60,000 kWh annually to offset rising local electricity prices. Combined with peak-valley arbitrage and on-site self-consumption modes, long-term power expenses drop significantly, compressing operational expenditure and enhancing the market competitiveness of farms. The system topology design featuring short-distance DC combiner and AC parallel even power distribution reduces line loss and further improves energy utilization efficiency.
(III) Long-Term Development Value: Standardized Modular Topology Adaptable to Farm Scale Expansion
Each inverter is rated 12kW, expandable to 72kW via parallel connection of up to six units. Energy storage batteries can be paralleled to increase capacity on demand. Standardized buses and power distribution cabinets reserve expansion interfaces. When farms expand or add incubation workshops later, the system can be upgraded by adding matching equipment, with all initially purchased complete equipment and power distribution circuits reusable, delivering long-term reuse value for upfront investment.
(IV) Environmental Sustainability Value: Clean Energy Reduces Carbon Emissions
Centered on zero-carbon solar energy, the system replaces conventional municipal power and diesel generation to cut exhaust and pollutant emissions. Continuous noise interference from diesel units is eliminated to optimize the growth environment for poultry, complying with Latin America’s green agricultural development policies and creating an eco-friendly farming production model.
Chicken Farm in Peru
VII. Conclusion
This customized 36kW/60kWh integrated PV-energy storage solution targets Peruvian farms with weak grids, high electricity prices and non-negotiable zero-power-cut demands for incubation. The system schematic fully matches on-site complete deployed equipment, adopting a standardized topological structure of three parallel 12kW inverters, DC combiner of four 15kWh energy storage batteries and dual independent MPPT PV input. 630W N-type high-efficiency PV modules are selected, and the series-parallel voltage of arrays has passed verification under high and low temperature extreme conditions, staying within the safe operating range of equipment at all times. Separate wiring of AC and DC cables plus graded power distribution protection meet stringent electrical application requirements of South America.
The system integrates multiple core functions: high-efficiency PV power generation for cost reduction, 10ms emergency uninterrupted power supply and large-capacity energy storage for nighttime backup. The triple hardware redundant architecture drastically elevates power supply reliability, resolving hidden farming safety hazards from frequent local grid blackouts while persistently lowering power bills through PV self-consumption. For the Latin American farming industry, this complete PV-energy storage system is far more than auxiliary power equipment — it acts as a core productivity tool securing stable production, optimizing operational costs and supporting long-term capacity expansion. Its standardized parallel topology can be replicated and promoted to similar farming scenarios worldwide featuring high electricity prices and underdeveloped power grids.
