AINEGY Off-grid Solar BESS · PV MPPT Input · Diesel Generator Interface · Liquid Cooling

AINEGY Off-grid Solar BESS Cabinet / Liquid Cooling

Name: AINEGY Off-grid Solar BESS Cabinet / Liquid Cooling
Brand: AINEGY
SKU: AINEGY-OFFGRID-SOLAR-BESS-LC

The AINEGY Off-grid Solar BESS Cabinet / Liquid Cooling is a liquid-cooled solar battery energy storage cabinet with PV MPPT input, LiFePO4 battery system, PCS, BMS and EMS. It can be configured for PV-only, diesel generator plus BESS, or PV-diesel-battery hybrid projects in off-grid, weak-grid, backup power and microgrid applications.

This cabinet is different from a standard on-grid solar storage cabinet. The same electrical platform can be used in an off-grid system topology where PV generation, battery storage, diesel generator input and critical loads need to be coordinated by project-level control logic. Actual PV interface, diesel generator interface, switching, protection and black-start behavior should be confirmed according to the selected project configuration.

125kW / 261kWhFor moderate C&I loads, smaller microgrids and backup power projects.

250kW / 522kWhFor larger off-grid, weak-grid and PV-diesel-battery projects.

PV MPPT Input120kW PV input for the 125kW model and 240kW PV input for the 250kW model.

Diesel Generator InterfaceCan be configured for diesel-only support or PV-diesel hybrid operation.

BMS / PCS / EMSBattery management, power conversion and energy dispatch platform.

Liquid CoolingBattery thermal management for high-capacity cabinet operation.

Send Project Requirements to AINEGY View Technical Specifications

About AINEGY Off-grid Solar BESS Cabinet / Liquid Cooling

AINEGY designs commercial and industrial energy storage solutions for off-grid, weak-grid, backup power and microgrid applications. This AINEGY Off-grid Solar BESS Cabinet / Liquid Cooling is positioned for projects where PV generation, battery storage, optional diesel generator input and critical loads must be coordinated through a cabinet-level solar storage platform.

The product belongs to the AINEGY C&I solar energy storage cabinet portfolio and is intended for EPCs, system integrators and project owners evaluating PV + BESS, diesel generator + BESS, or PV-diesel-battery hybrid architectures. Final configuration should be reviewed according to PV string design, generator strategy, load profile, backup duration, switching design and target market requirements.

What Is an Off-grid Solar BESS Cabinet?

An off-grid solar BESS cabinet is a cabinet-level energy storage platform that combines solar input, battery storage, AC/DC power conversion and energy dispatch for projects where the utility grid is unavailable, unstable or not the primary power source. This product integrates PV MPPT input, LiFePO4 battery, PCS, BMS and EMS in one liquid-cooled cabinet platform.

The product can be configured according to project needs: PV + BESS, diesel generator + BESS, or PV + diesel generator + BESS. The selected configuration should be confirmed before system design, because each mode requires different protection, switching and control logic.

PV MPPT InputPV energy enters through the cabinet’s PV input side. The 125kW model supports 120kW PV input and the 250kW model supports 240kW PV input.

Battery StorageThe LiFePO4 battery stores solar energy, generator energy or reserve energy for load supply, backup operation and microgrid dispatch.

PCS ConversionThe PCS manages power conversion between the battery side and the AC side for load supply and system integration.

EMS DispatchThe EMS coordinates charge and discharge logic according to PV generation, load demand, SOC reserve, generator operation and project priorities.

Diesel InterfaceA diesel generator interface can be configured where generator recharge, hybrid operation or long-duration backup is required.

Critical LoadsBackup power should be planned around selected critical loads, not simply all loads on the site.

Three Project Configurations

The same cabinet platform can be selected for different off-grid system architectures. This is important for EPCs, microgrid developers and C&I project owners who may not need both PV and diesel generator functions in every project.

PV + BESS

Solar-first Off-grid Storage

Suitable for sites with sufficient PV generation and predictable daily loads. The cabinet stores PV energy and supplies loads when PV output is low, during evening periods or during short power interruptions.

Diesel + BESS

Generator Support and Load Buffering

Suitable for sites where PV is not installed or will be added later. The BESS can reduce generator cycling, support short peak loads and provide stored energy when generator runtime should be reduced.

PV + Diesel + BESS

Hybrid Microgrid Operation

Suitable for remote sites, islands, mines, oilfields and weak-grid projects. PV supplies renewable energy, the BESS smooths power and supports backup, while diesel provides long-duration power when solar and battery reserve are not enough.

What Problems It Solves

This product is designed for project teams that need a compact solar battery storage cabinet with PV input, optional diesel generator integration and liquid-cooled battery capacity for off-grid or weak-grid operation.

Off-grid Power Supply

Supports local power supply where utility grid access is unavailable, unstable or expensive to extend. System design should match load type, required autonomy time and backup priority.

Diesel Runtime Reduction

In PV-diesel-battery systems, the cabinet can store PV energy and support loads, reducing unnecessary generator runtime when dispatch logic is properly configured.

PV Energy Utilization

Stores solar energy that would otherwise be underused or curtailed, then releases it when PV generation falls or load demand increases.

Critical Load Backup

Helps support selected critical loads such as pumps, lighting, refrigeration, communications, controls and emergency circuits when paired with proper switching and protection design.

Weak-grid Support

For unstable grid areas, the system can be configured to reduce grid dependence and support site-level power continuity with PV, battery and optional diesel generator input.

Microgrid Energy Dispatch

The cabinet can serve as the core storage unit in a microgrid architecture, coordinating with PV, generator and load control according to project-level EMS strategy.

Model Selection

Select the model according to PV input design, AC load demand, generator capacity, required backup time, installation footprint and system operation mode.

125kW / 261kWh

Choose this model for moderate C&I loads, smaller off-grid systems, gas stations, supermarkets, commercial buildings and remote sites with around 120kW PV input design.

ModelIYP-B261L-125G3-120M1-HX1

Best FitSmall factories, gas stations, supermarkets, commercial buildings and remote service sites.

Rated Energy261kWh LiFePO4 battery.

PV Max Power120kW, 1 channel.

MPPT Range250–850Vdc.

AC Power125kW input / output.

Parallel Number12 units.

Cabinet Size980 × 1300 × 2350mm.

WeightAbout 2500kg.

250kW / 522kWh

Choose this model for larger off-grid projects, industrial sites, mines, oilfields, island microgrids and projects with higher PV input or stronger backup requirements.

ModelIYP-B522L-250G3-240M2-HX1

Best FitLarger factories, industrial parks, mines, oilfields and high-load microgrid projects.

Rated Energy522kWh LiFePO4 battery.

PV Max Power240kW, 2 channels.

MPPT Range250–850Vdc.

AC Power250kW input / output.

Parallel Number6 units.

Cabinet Size2000 × 1350 × 2300mm.

WeightAbout 4700kg.

For larger off-grid or hybrid projects, confirm motor starting current, generator capacity, critical-load priority, battery reserve SOC and required autonomy time before final selection.

Technical Specifications

Parameter	125kW / 261kWh	250kW / 522kWh
Model	IYP-B261L-125G3-120M1-HX1	IYP-B522L-250G3-240M2-HX1
Product Type	Off-grid Solar BESS Cabinet / Liquid Cooling	Off-grid Solar BESS Cabinet / Liquid Cooling
Integrated Platform	PV MPPT / BMS / PCS / EMS	PV MPPT / BMS / PCS / EMS
Battery
Battery Type	LiFePO4 Battery	LiFePO4 Battery
Rated Energy	261kWh	522kWh
PV
Max. Power	120kW (1 channel)	240kW (2 channels)
Max. PV Voltage	950Vdc	950Vdc
MPPT Voltage Range	250–850Vdc	250–850Vdc
Max. PV Input Current	200A	200A + 200A
MPPT Channels	1	2
AC Input
Rated Power	125kW	250kW
AC Voltage	400Vac/230Vac (L1/L2/L3/N/PE)	400Vac/230Vac (L1/L2/L3/N/PE)
Rated Frequency	50Hz/60Hz	50Hz/60Hz
Max. AC Current	189A	375A
AC Output
Rated Power	125kW	250kW
AC Voltage	400Vac/230Vac (L1/L2/L3/N/PE)	400Vac/230Vac (L1/L2/L3/N/PE)
Rated Frequency	50Hz/60Hz	50Hz/60Hz
Max. AC Current	189A	375A
Parallel Number	12	6
General Parameter
Communication Type	RS485 / WiFi	RS485 / WiFi
IP Grade	IP65 (Battery)	IP65 (Battery)
Fire Protection System	Yes	Yes
Operating Temperature	-10°C–55°C	-10°C–55°C
Humidity Range	5%–95%	5%–95%
Altitude	<2000m	<2000m
Battery Cooling Method	Liquid cooling	Liquid cooling
PCS Cooling Method	Intelligent cooling	Intelligent cooling
Size	980 × 1300 × 2350mm	2000 × 1350 × 2300mm
Weight	About 2500kg	About 4700kg

Parameters are for reference. Final PV string design, diesel generator interface, EMS logic, switching design, protection scheme, grounding, load priority and installation requirements should be confirmed according to project conditions.

PV Design Checks

PV open-circuit voltage must stay below the 950Vdc maximum PV voltage.
PV operating voltage should match the 250–850Vdc MPPT range.
PV input current must match the cabinet channel limit.
Confirm whether the project uses PV-only or PV-diesel hybrid operation.

Diesel Generator Checks

Confirm generator rated power and overload capacity.
Confirm generator start/stop logic and communication requirements.
Define when generator should recharge the battery.
Confirm whether diesel function is required now or reserved for future expansion.

Load and Backup Checks

Separate critical and non-critical loads.
Check motor, pump and compressor starting current.
Confirm required backup duration and reserve SOC.
Review ATS/STS, grounding and protection design.

AINEGY Off-grid Solar BESS Cabinet / Liquid Cooling system diagram with PV input battery PCS BMS EMS diesel generator interface AC bus critical loads and optional weak-grid input

System Design: PV, Battery, Diesel and Load Coordination

The system diagram for this product should be different from the on-grid solar BESS cabinet. In an off-grid or weak-grid project, the cabinet may work with PV generation, diesel generator input, AC bus, critical loads and optional weak-grid input. The EMS strategy decides when to use solar energy, when to discharge the battery, when to start the generator and how much reserve SOC should be maintained.

PV InputSolar energy can charge the battery through the PV MPPT input within the specified PV voltage and current range.

Battery StorageThe LiFePO4 battery stores solar energy or generator energy for load supply and backup reserve.

Diesel InterfaceDiesel generator connection can be configured when long-duration backup or low-solar operating conditions need support.

AC BusThe cabinet exchanges power with the local AC bus or microgrid bus according to project-level system design.

Critical LoadsImportant loads should be separated and prioritized to avoid oversizing the system for non-essential loads.

Protection DesignSwitching, grounding, short-circuit protection and local electrical codes must be reviewed by the project engineer.

Liquid Cooling for Off-grid Solar Storage

Off-grid solar storage systems may cycle frequently because of PV fluctuation, generator dispatch, load changes and backup reserve requirements. Liquid cooling helps manage battery heat more evenly in high-capacity cabinet layouts.

High-capacity Cabinet Layout

261kWh and 522kWh battery capacities are packed into cabinet form, making thermal design important for stable operation.

Daily Charge and Discharge

PV charging, evening discharge, generator recharge and backup reserve can create repeated thermal cycles.

Temperature Uniformity

Liquid cooling supports more even heat transfer across battery modules compared with relying only on airflow.

Project Reliability

More stable thermal conditions support more predictable operation in remote or weak-grid projects.

PCS Intelligent Cooling

The battery uses liquid cooling while the PCS uses intelligent cooling according to the product specification.

Installation Planning

Cabinet spacing, ambient temperature, altitude, service access and drainage should still be confirmed before installation.

AINEGY AINEGY Off-grid Solar BESS Cabinet / Liquid Cooling applications for mountain island gas station factory supermarket mine oilfield and remote microgrid projects

Typical Applications

This cabinet is suitable for off-grid, weak-grid and hybrid-energy projects where PV, battery storage and optional diesel generator operation need to support local loads.

Mountain & Island SitesFor remote areas where grid extension is expensive or supply quality is limited.

Gas StationsFor pump, lighting, refrigeration, communication and convenience-store loads.

Factory Power SupplyFor C&I facilities that require PV storage, backup support or weak-grid energy management.

SupermarketsFor refrigeration, HVAC, lighting and selected critical commercial loads.

Mines & OilfieldsFor heavy-load remote sites that may combine PV, BESS and diesel generation.

Emergency BackupFor projects where critical loads require stored energy and optional generator support during outages.

Difference From On-grid Solar BESS Cabinet

The parameter table can be the same, but the system topology and operating target are different.

On-grid Solar BESS Cabinet

Mainly used for grid-connected PV self-consumption, peak shaving, time-of-use shifting and solar energy management when the utility grid is available and stable.

Off-grid Solar BESS Cabinet

Used for off-grid supply, weak-grid support, backup power, PV-diesel-battery hybrid operation and microgrid energy dispatch. Diesel generator interface, load priority and switching design become key project topics.

Certification and Documentation Support

AINEGY can provide documentation support for applicable models and project requirements, including battery transport, material safety, electrical compliance, grid connection and fire-safety-related documentation. Final document scope depends on the selected configuration, target market and certificate availability for the exact model.

FAQ

What load profile and autonomy target should be used to size this AINEGY off-grid solar BESS cabinet?Provide 15-minute or hourly load data, peak load, continuous load, daily energy consumption, motor starting current, critical-load list, non-critical-load list, required backup duration and reserve SOC requirement. These values determine whether the 125kW/261kWh or 250kW/522kWh configuration is appropriate.

How should the PV array be designed against the cabinet’s PV input limits?Provide PV capacity, module specification, string quantity, open-circuit voltage at the lowest site temperature, operating voltage, string current, MPPT channel plan and future PV expansion requirement. The PV design must stay within the 950Vdc maximum PV voltage, 250–850Vdc MPPT range and PV input current limits.

Should the project be configured as PV + BESS, diesel generator + BESS, or PV-diesel-battery hybrid?Confirm whether the site requires PV-only storage, diesel generator support, PV-diesel hybrid operation, weak-grid input or full off-grid operation. Each topology requires different EMS logic, switching design, reserve SOC strategy and protection coordination.

What diesel generator data is required before quotation?Provide generator rated power, overload capacity, voltage, frequency, phase, fuel-saving target, start/stop signal method, communication interface, minimum loading requirement and the planned battery recharge strategy. This is required when generator support or PV-diesel-battery hybrid operation is expected.

What switching, grounding and protection details must be confirmed?Provide AC bus design, ATS/STS requirement, bypass design, grounding method, short-circuit capacity, breaker and cable sizing, critical-load separation, earthing system and local electrical code requirements. These details affect system safety and integration feasibility.

Does the project require black start or islanded operation?Confirm whether black start, islanded operation, generator-assisted startup or weak-grid transition is required. These functions depend on PCS control capability, EMS strategy, switching sequence, battery SOC, load energization order and protection settings.

What installation conditions should be reviewed for the IP65 battery cabinet?Provide installation location, indoor or outdoor exposure, ambient temperature, altitude, humidity, drainage, foundation load, lifting conditions, cable entry route, cabinet spacing and maintenance clearance. These conditions affect thermal performance, service access and long-term reliability.

What commercial and compliance information should be provided before quotation?Provide destination country, required certification documents, grid or microgrid approval requirements, project quantity, delivery location, target installation date, customization needs, labeling requirements, communication protocol expectations and after-sales support requirements.

Send Professional Project Data for Off-grid Solar Storage Evaluation

Share your PV capacity, PV string design, diesel generator capacity, load curve, motor starting current, critical-load list, required backup time, site location and selected operating mode. AINEGY can help match the correct off-grid solar BESS cabinet configuration for PV-only, diesel-only or PV-diesel-battery hybrid projects.

Contact AINEGY