Microgrid & Off-Grid Charging System
End-to-end microgrid systems for remote sites, island communities, mining camps, and telecoms base stations - combining solar, storage, and EV charging to eliminate diesel dependency.
The Challenge
Remote sites paying diesel prices of $1.5-3.0 per litre for generator fuel face prohibitive energy costs. Extending the grid to these sites costs $100,000+ per km. The opportunity is a solar+storage microgrid that covers all site loads including EV charging, with zero fuel cost after payback.
Our Approach
- Solar array sizing: We design the PV array to cover 100% of average daily load including EV charging, with a 20% safety margin for cloudy periods.
- LiFePO4 BESS: Battery sized for 2-3 days of autonomy at critical load. LiFePO4 cycle life of 6,000+ cycles dramatically reduces battery replacement cost over project life.
- Hybrid inverter(s): Master-slave inverter configuration scales from 5kW to 50kW+ by paralleling units. Diesel generator remains as last-resort backup.
- EV charger as managed load: The EV wallbox operates as a flexible load - when solar surplus is available it charges at full power, when battery is low it drops to minimum or pauses.
- Remote SCADA: Full site monitoring via 4G/satellite link. Alarm and daily report sent to your NOC. OTA firmware update for all devices.
Recommended Products
10kW Three-Phase Hybrid Inverter
Master-slave scalable, off-grid mode
15-35kWh LiFePO4 PowerWall
Modular, stack to 1MWh+
7kW Managed EV Wallbox
Solar surplus priority charging
Case Reference
Isolated mining camp: 80kWp solar + 200kWh LiFePO4 + 3x 10kW inverters + 4x 7kW EV wallboxes. Diesel generator run-hours reduced 94%. Fuel saving: $180,000/year. Carbon reduction: 420 tonnes CO2/year.
FAQ
Can this system operate with zero grid connection?
Yes. The hybrid inverter operates in full island mode when no grid is available. The BESS provides power during night and cloudy periods. The diesel generator acts as last resort for extended low-solar events.
How do you handle very cloudy periods?
We size the battery for 2-3 days of autonomy at critical load. The diesel generator automatically starts when battery SoC drops below a configurable threshold (typically 20%) and charges the battery to 50% before shutting down.
Is the system scalable if my load grows?
Yes. Add inverter units in master-slave configuration (max 6 units = 60kW). Add battery modules in parallel. Add PV strings to existing inverter MPPT inputs up to rated maximum.
What monitoring is included?
All devices report to our cloud SCADA via RS485/Modbus and 4G modem. You receive daily energy reports, alarm notifications, and access to a real-time web dashboard. Optional local display for sites with no connectivity.
Ready to Start Your Project?
Send us your site plan or power requirements and we will prepare a complimentary system design within 2 business days.
Get Free System Design