Product Overview

Off Grid Solar Battery Storage delivers reliable, independent power where the utility grid does not reach, or where it cannot be trusted. This is not a grid-tied system with a backup mode bolted on. It is designed from the ground up as a standalone power plant: solar charge control, battery management, AC generation, and load management are integrated into a single platform that operates autonomously, 24 hours a day, without any grid connection.

The system pairs LFP battery banks with high-efficiency MPPT solar charge controllers and a pure sine wave inverter/charger. An onboard load management controller prioritizes critical circuits, sheds non-essential loads during low-SOC conditions, and can start a backup generator automatically when solar input is insufficient for extended periods.

Technical Specifications

Parameter	Specification
Battery Chemistry	LFP (LiFePO₄)
System Capacity	50kWh/100kWh/215kWh/500kWh (modular)
Inverter/Charger Rating	30kW/50kW/100kW/250kW
AC Output	220V/230V/240V single-phase or 380V/400V three-phase, 50/60 Hz
Output Waveform	Pure sine wave, THD < 3%
Max PV Input	Up to 150% of battery capacity
MPPT Voltage Range	200V-850V DC
MPPT Efficiency	≥ 99.5%
Transfer Time (Gen Start)	<15 ms (UPS-grade for critical loads)
Generator Interface	Auto-start/stop, load sharing, smart charging
Battery Cycle Life	≥ 6,000 cycles @ 80% DoD
Operating Temperature	-10 °C to +60 °C
Protection Rating	IP55
Communication	RS485, CAN, Modbus, optional 4G/satellite for remote monitoring
Certifications	IEC 62619, IEC 62109, CE
Design Life	15 years

Core Purpose

This system exists to answer one question: how do you power a facility that has no grid? The answer is a self-contained solar-battery power plant that generates, stores, and distributes electricity independently. It replaces diesel generators as the primary power source, using solar as the main energy input and batteries as the buffer that bridges night, clouds, and seasonal variation.

Unlike portable solar kits or residential battery walls, this is industrial-grade equipment rated for continuous duty in harsh environments say desert heat, tropical humidity, high altitude, and remote locations where maintenance visits are infrequent and expensive.

Typical Application Scenarios

Remote Mining Camp

A gold mining operation 120km from the nearest grid connection runs a camp for 200 workers plus processing equipment totaling 150kW continuous load. Previously powered by three 100kVA diesel generators burning 380 liters/day, the site deployed a 500kWh/250kW off-grid solar storage system with 400kWp PV. Diesel consumption dropped to 60 liters/day (generator runs only during extended overcast periods), saving a lot fuel and logistics costs. The system paid for itself in about 22 months.

Agricultural Irrigation Station

A 500-hectare farm in sub-Saharan Africa operates 12 submersible pumps drawing 80kW total during irrigation cycles. Grid extension was quoted at $420,000 with a 14-month lead time. A 215kWh/100kW off-grid system with 180kWp PV was installed in 3 weeks. The load management controller staggers pump start-up to avoid inrush current stacking, and the system runs the full irrigation schedule on solar alone for 9 months of the year. During the rainy season, reduced solar input is supplemented by a small 30 kVA backup generator that runs 2–3 hours per day.

Telecom Base Station Cluster

A mobile network operator powers 15 rural base stations across a 200 km corridor, each consuming 3–5 kW continuously. Each site received a 50 kWh / 30 kW off-grid unit with 20 kWp PV. The satellite-connected monitoring system reports SOC, solar yield, and load data to the NOC in real time. Generator dispatch is triggered remotely only when SOC drops below 20%, which happens fewer than 10 days per year. Network uptime improved from 94% (diesel-only) to 99.7%.

Island Resort & Eco-Lodge

A 30-room eco-resort on a Pacific island replaced its aging diesel plant with a 500kWh/250 W off-grid solar storage system. Guest rooms, kitchen, laundry, and water desalination run entirely on solar-battery power. The load management controller deprioritizes pool heating and decorative lighting during low-SOC periods, ensuring essential services (water, refrigeration, safety lighting) are never interrupted. Diesel generator runtime dropped from 18 hours/day to under 2 hours/day, and the resort markets its near-zero-emission operation as a guest experience differentiator.

System Sizing Guidance

Off-grid sizing is more critical than grid-tied sizing - there is no utility to fall back on. The key inputs are:

• Daily energy consumption (kWh/day) - measured or estimated from equipment schedules

• Peak instantaneous load (kW) - determines inverter size

• Solar resource (kWh/m²/day) - location-specific, worst-month value

• Autonomy requirement (days) - how many cloudy days the battery must cover without generator

• Backup generator availability - if available, battery can be sized smaller

Daily Load	Autonomy	Recommended Battery	PV Array
< 100 kWh/day	2 days	50-100kWh	40-80kWp
100–300 kWh/day	2 days	100-215kWh	80-200kWp
300–800 kWh/day	1.5 days	215-500kWh	200-500kWp
> 800 kWh/day	1 day	500kWh and modular expansion	Custom design

Share your site coordinates, load profile, and autonomy requirements, we will run a simulation using local solar irradiance data and provide a complete system design with energy balance projections.

Packaging & Shipping

Systems ship in standard 20 ft or 40 ft containers depending on capacity. Battery modules, inverter/charger, solar charge controllers, and cabling are palletized separately with anti-vibration packaging rated for ocean freight. PV panels ship on dedicated panel pallets with corner protection.

For remote sites with limited unloading equipment, we offer a containerized all-in-one variant: the entire system is pre-installed inside a modified shipping container, requiring only PV array connection and AC distribution wiring on site. The container is crane-lifted or forklift-placed - no civil works beyond a compacted gravel pad.