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LiFePO4 storage banks and hybrid inverters for rural electrification, health clinics, schools and village mini-grids.

Off-Grid and Mini-Grid Solar Storage Solution

Overview

Off-Grid and Mini-Grid Solar Storage Solution

Off-grid solar systems succeed or fail on two things: storage bank sizing and the ability to survive heat, dust and irregular maintenance. EcoDyny supplies LiFePO4 storage banks, hybrid inverters and packaged containerised systems for rural electrification projects across Africa, South Asia and Southeast Asia. Our storage is built on 48V or high-voltage rack architectures with integrated BMS and, where required, solar charge controllers, so integrators receive a coherent DC bus rather than a set of components to reconcile. Systems are designed for daily deep cycling, high ambient temperatures and long service intervals, with remote monitoring where grid or GSM coverage allows. We work on quotation with EPCs, NGOs, project developers and government programmes.

Part 01

Storage Bank Sizing and Architecture

Most off-grid failures trace back to undersized storage or an oversized inverter relative to the load profile. We start from the daily energy requirement, autonomy days and peak load, then select a bank configuration that keeps depth of discharge within a cycle-life-friendly band.

48V rack banks from 5 kWh to 60 kWh for clinics, schools, shops and small productive loads
High-voltage stacked banks from 50 kWh to 500 kWh for village mini-grids and agro-processing
Design target of 70-80% maximum depth of discharge on a normal day
Autonomy of one to three days depending on load criticality and generator backup
Battery-inverter voltage and communication compatibility confirmed before shipment

We supply the sizing worksheet we use internally so integrators can verify assumptions and adjust for local irradiance, load growth and future expansion.

Part 02

Heat, Dust and Serviceability in Field Conditions

Rural installations rarely have air conditioning, and ambient temperatures of 35-45C are routine. LiFePO4 tolerates heat better than most lithium chemistries, but the system still has to be engineered for it.

BMS charge derating above 45C and discharge derating above 55C to protect cells
Passive or fan-assisted ventilation with dust filters on enclosures rated IP54 or IP65
Rack spacing and airflow paths specified in the installation manual
Front-access terminals and modular battery modules so a failed module can be replaced without dismantling the bank
Anti-theft provisions: locked enclosures, tamper alerts and, where appropriate, indoor siting

We also supply a commissioning checklist covering torque values, insulation checks, BMS parameter verification and a first full charge-discharge cycle to establish a baseline. Spare BMS boards and module-level fuses are recommended as part of the initial shipment so that first-year faults can be resolved locally rather than through an international return.

Part 03

Mini-Grid Control, Monitoring and Expansion

As a mini-grid grows, storage stops being a battery problem and becomes a control problem. Our systems are designed to integrate with the site's energy management approach rather than lock the developer into one vendor's controller.

Hybrid inverter options from 5 kW to 15 kW single- and three-phase, with parallel capability for larger sites
Support for generator-assisted charging where diesel remains as backup
Remote monitoring via 4G where coverage exists, with local data logging as fallback
Tariff and load-limit configuration support for productive-use customers such as milling or irrigation
Modular expansion: additional racks can be added later without replacing the inverter or BMS master

We can supply system diagrams, protection coordination notes and a spare-parts recommendation sized for the site's remoteness and expected service interval.

Benefits

What this design gives you

Sizing Built on Load Data

Storage and inverter selection follows the measured or projected daily load profile, avoiding both chronic under-supply during peak evening hours and capital wasted on battery banks that are never fully used.

High Ambient Tolerance

LiFePO4 chemistry with temperature-aware BMS derating and ventilated enclosures keeps systems operating through tropical and arid conditions without air conditioning, which is rarely available or affordable at rural sites.

Module-Level Serviceability

Modular battery modules and front-access terminals let local technicians replace a single failed unit on site instead of shipping an entire bank back to the factory and leaving the community without power.

Diesel Reduction

Solar-priority operation with generator assistance only when needed cuts fuel logistics costs and reduces exposure to price and supply volatility in remote regions where diesel delivery is irregular and expensive.

Remote Diagnostics

Where GSM coverage exists, BMS and inverter data can be reviewed remotely, reducing the number of site visits required to diagnose faults and plan maintenance across a geographically dispersed project portfolio.

Project Documentation Pack

System diagrams, commissioning checklists and spare-parts lists are supplied for tender submissions and for handover to local operations teams responsible for long-term maintenance and community-level service support.

Specification

Reference specification

System voltage	48V DC or high-voltage 200-800V DC
Storage capacity range	5 kWh to 500 kWh
Chemistry	LiFePO4
Usable depth of discharge	Up to 80% (design target 70-80%)
Cycle life at 80% DoD	3,000-6,000 cycles
Inverter rating	5 kW / 10 kW / 15 kW, single or three phase
Autonomy	1-3 days typical
Enclosure protection	IP54 to IP65
Monitoring	Local logging standard, 4G remote optional