AoKu AKSPI-RM Series Off-Grid Rack-Mounted Solar Inverter with MPPT Charger (3kW / 5kW)
AoKu AKSPI-RM Series Off-Grid Rack-Mounted Solar Inverter with MPPT Charger (3kW / 5kW)
AoKu AKSPI-RM Series (3kW-5kW) is a professional 3U rack-mounted off-grid pure sine wave solar inverter with an MPPT charger. Designed for standard 19-inch cabinets, it supports battery-free solar operation, <10ms transfer, AC auto-restart, lithium BMS communications, and optional parallel scaling.
KEY FEATURES & BENEFITS
Space-Saving Standardized 3U Rack-Mounted Casing
Designed with a standard 3U rackmount profile, this inverter is specifically optimized to fit into unified IT server cabinets and solar battery enclosures. It aligns perfectly with modular lithium battery configurations for clean, professional, and space-saving deployments.
Battery-Free Solar Operation (Work Without Battery)
When solar power from the PV panels is sufficient, the AKSPI-RM series supports battery-free operation, allowing the system to run loads directly from PV power. This drastically cuts initial investment and maintenance overhead for budget-focused B2B projects.
Built-In High-Performance MPPT Charge Controller
Equipped with a built-in Maximum Power Point Tracking (MPPT) solar charger supporting PV inputs up to 4000W (3kW) or 5500W (5kW). It has a wide MPPT tracking range of 120-430 VDC and a maximum open PV input voltage of 500 VDC to maximize energy yield in any weather.
Smart Flexible Multi-Mode Configuration
Features multi-mode settings allowing operators to program priority levels for PV power, utility AC mains, or batteries directly through the user-friendly on-board LCD screen, adapting seamlessly to unstable utility grids or off-grid remote settings.
Industrial Auto-Restart, BMS Communication & Parallel Scaling
The inverter automatically restarts connected loads when PV or AC mains power recovers after a low-battery shutdown. Includes a dedicated Lithium Battery BMS card interface (CAN/RS485), smart WIFI modules, and optional parallel cards for the 5kW model to enable redundant clustering.
PRODUCT SPECIFICATIONS
| Category | Technical Parameter | AKSPI-3KW-24V-RM | AKSPI-5KW-48V-RM |
|---|---|---|---|
| Output Ratings | Rated Capacity | 3000VA / 3000W | 5000VA / 5000W |
| Peak Power (Surge) | 6000VA | 10000VA | |
| Output Voltage & Format | 208 / 220 / 230 / 240VAC ± 5% (L + N + PE) | 208 / 220 / 230 / 240VAC ± 5% (L + N + PE) | |
| Waveform & Frequency | Pure Sine Wave (50Hz / 60Hz ± 0.1%) | Pure Sine Wave (50Hz / 60Hz ± 0.1%) | |
| Mains AC Input | Input Format & Rated Voltage | L + N + PE (208 / 220 / 230 / 240VAC) | L + N + PE (208 / 220 / 230 / 240VAC) |
| Utility Voltage Window | Appliance Mode: 90 ~ 280VAC UPS Mode: 170 ~ 264VAC (Selectable via LCD) |
Appliance Mode: 90 ~ 280VAC UPS Mode: 170 ~ 264VAC (Selectable via LCD) |
|
| Input Frequency Range | 50Hz / 60Hz (Auto-Sensing) | 50Hz / 60Hz (Auto-Sensing) | |
| AC Mode Transfer Time | 10ms (Typical) | 10ms (Typical) | |
| Solar Charger (MPPT) | Solar Charger Type | MPPT | MPPT |
| Max. PV Input Power | 4000W | 5500W | |
| MPPT Tracking Voltage Range | 120 ~ 430 VDC | 120 ~ 430 VDC | |
| Max. PV Open Circuit Voltage | 500 VDC | 500 VDC | |
| Max. PV Charging Current | 80 A | 80 A | |
| Battery & Charging | Battery System Voltage | 24 VDC | 48 VDC |
| Constant Charging Voltage | 28.2 VDC (Fully Adjustable via LCD) | 56.4 VDC (Fully Adjustable via LCD) | |
| Float Charging Voltage | 27.0 VDC (Fully Adjustable via LCD) | 54.0 VDC (Fully Adjustable via LCD) | |
| Max. Mains AC Charging Current | 60 A | 80 A | |
| Max. Charging Current (AC + PV) | 120 A | 80 A | |
| Physical & Mechanical | Structural Design | 3U Standard Rack Casing | 3U Standard Rack Casing |
| Dimensions (D x W x H mm) | 405 x 483 x 133.5 mm (Standard 19-inch 3U Rackmount) | 405 x 483 x 133.5 mm (Standard 19-inch 3U Rackmount) | |
| Net Weight (kg) | 7.0 kg | 7.8 kg | |
| Redundant Parallel Support | No Parallel Function | With Parallel Function (Optional) | |
| Communications | Standard Comm Interface | RS232 (5PIN / Pitch 2.0 mm), Baud Rate 2400 | RS232 (5PIN / Pitch 2.0 mm), Baud Rate 2400 |
| Intelligent Expansion Slot | 2 x 5PIN / Pitch 2.54 mm slot | 2 x 5PIN / Pitch 2.54 mm slot | |
| Supported Interface Cards | Lithium Battery BMS Card, WIFI Remote Card, Dry Contact Card, etc. | Lithium Battery BMS Card, WIFI Remote Card, Dry Contact Card, etc. | |
| Environmental Limit | Operating Temperature | 0 ~ 40 °C | 0 ~ 40 °C |
| Operating Humidity | 20% ~ 95% Relative Humidity (Non-condensing) | 20% ~ 95% Relative Humidity (Non-condensing) | |
| Altitude Restrictions | ≤ 1000m (linear de-rating above 1000m, max 4000m), IEC62040 Standard | ≤ 1000m (linear de-rating above 1000m, max 4000m), IEC62040 Standard | |
| Audible Operating Noise | ≤ 50 dB (Active Cooling Intelligent Fans) | ≤ 50 dB (Active Cooling Intelligent Fans) |
Technical Documentation
Access complete industrial specification layouts, installation blueprints, communication protocol guides, and international compliance certifications.
Technical Catalog
Get the AoKu AKSPI-RM Series catalog for full electrical specifications, cabinet dimensions, battery configurations, wiring guides, and certifications.
User Manual
Get the AoKu AKSPI-RM Series user manual for step-by-step installation, wiring diagrams, LCD settings, warning/fault code solutions, and battery maintenance.
PRODUCT APPLICATIONS
The AoKu AKSPI-RM Series Off-Grid Rack-Mounted Solar Inverter is engineered for standard 19-inch IT cabinets and modular solar battery enclosures. Delivering high-conversion pure sine wave power, it is widely utilized across six core sectors globally:
1. Telecom Relay Bases & Modular enclosures
Fits seamlessly into standardized 19-inch cabinet configurations for remote telecom towers, 5G relay stations, and rural communication enclosures. Features dedicated dry contact interfaces, RS485, and BMS communication links to manage and protect smart Lithium Iron Phosphate (LiFePO4) battery modules.
2. Remote Modular Cabin & Residential Energy
Powers complete residential home environments, remote off-grid cabins, and modern pre-fabricated container homes. The high-purity pure sine wave output runs heavy inductive loads like air conditioners, refrigerators, deep-well water pumps, and laundry appliances with zero electrical noise.
3. Off-Grid Industrial automation Cabinets
Protects PLC racks, remote CNC control boards, on-field sensor routers, and telemetry systems in remote gas pipelines, oil rigs, or weather stations. Supporting wide AC input windows and battery-free MPPT charging, it easily adapts to unstable generator or grid power lines.
4. Agricultural Solar Pump Systems
Operates greenhouse ventilation fans, solar-powered agricultural irrigation pumps, and water quality telemetry lines. Supports battery-free configuration, allowing solar power during peak sunny hours to run water pumping systems directly with zero battery cost.
5. Smart Commercial Facilities & Security Backup
Powers crucial office systems, core firewalls, centralized VoIP telephony, retail POS registers, and multi-tier security surveillance recorders in off-grid smart hubs. Safely bridges power gaps with <10ms transfer times during outages.
6. Hybrid Microgrid Solar Buffers
The built-in dual-mains/generator compatibility lets the AKSPI-RM series interface with portable solar microgrids and off-grid diesel generator networks without causing input voltage/frequency oscillations, optimizing energy reserves.
PRODUCT SOLUTIONS
Unstable grid inputs, high installation expenses, and battery maintenance sags are serious challenges for off-grid operations. The AoKu AKSPI-RM Rack-Mounted Power Solution delivers six engineered solutions:
1. Cost-Effective Battery-Free Solar Path
The Problem: Heavy upfront costs of high-capacity storage batteries deter users from switching to clean solar electricity.
AoKu Solution: When solar PV power is ample, the AKSPI-RM Series supports battery-less operation, carrying home or industrial loads directly. This allows users to deploy solar panels first and scale battery storage gradually.
2. High-Efficiency MPPT Energy Harvest
The Problem: Overcast weather and fast temperature swings degrade solar charger efficiency, leading to slow battery recovery.
AoKu Solution: Integrates a high-speed MPPT solar charge controller with a wide voltage tracking range of 120-430 VDC. This ensures that the system extracts the absolute maximum photovoltaic power from panels under all climatic variations.
3. Space-Saving 3U Cabinet Integration
The Problem: Wall-mounted inverters require massive workspace walls, creating messy wiring when combined with rack battery setups.
AoKu Solution: Built inside a standard 3U Rack-Mounted chassis (405x483x133.5 mm). It can be directly installed inside server cabinets, creating a neat, centralized power system with professional rack battery stacks.
4. Lithium Battery BMS & Smart Charging
The Problem: Mixing advanced lithium battery modules with generic inverters without communications leads to overcharging or sudden safety shutdowns.
AoKu Solution: Equipped with dual expansion slots for Lithium Battery BMS cards. The inverter communicates directly with smart battery packs, adjusting constant (28.2V/56.4V) and float voltages dynamically to ensure cell health.
5. Redundant Capacity Scaling (Parallel Function)
The Problem: Expanding off-grid operations means replacing existing inverters with bigger models, creating massive hardware waste.
AoKu Solution: The AKSPI-5KW-48V-RM model features standard parallel interfaces (With parallel function). Operators can link multiple 5kW rackmount modules together to scale capacity smoothly without discarding initial hardware.
6. Multi-Layer Industrial Protection & Auto-Restart
The Problem: Unmanned remote outposts require regular manual restarts when safety breakers or batteries drain completely.
AoKu Solution: Built-in battery over-discharge, overload, over-temperature, and short-circuit protection circuits. When PV solar or utility power is restored, the inverter automatically restarts connected loads with zero manual labor.
Frequently Asked Questions
Global Support & Services
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Pre-Sales Support
Custom configuration and technical consultation.
Post-Sales Support
24/7 assistance and localized parts support.
Global Warranty
Comprehensive coverage for all our hardware solutions globally.
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