MOBIPOWER Off-Grid Containerized Power Storage with roof top solar for large scale remote power when diesel is not an option.

A silent, worry-free alternative to loud and dirty diesel generators to meet high off-grid power needs using solar power generation – with optional wind turbine(s) for augmented power generation day and night. Harvested power stored in a choice of batteries including Lithium Ion, Absolyte 2 LiFe, and deep-cycle AGM batteries.

Bifacial Solar Array

The 16 panels mounted on the trailer offer 6kW in normal circumstances – but that output can be augmented by the fact that the eight panels on the roof section are ‘bifacial’ …able to absorb energy which has been reflected from the white trailer roof onto the back face of the panel adding 15 to 25% more power generation. This unique ability allows the photovoltaic installation to provide over 7kWp.

The roof and wall mounted panels lie flat and are secured during transport and are deployed in under twenty minutes on their heavy-duty aluminum racking frames to the appropriate tilt according to the site location for optimum sun power harvesting.

Power Electronics Architecture

Power electronics chosen to harvest the solar power include a pair Victron Energy’s SmartSolar MPPT 150/100’s for the roof section; and a pair of SmartSolar MPPT 150/70’s for the wall. All component parts of the installation are mounted directly onto a plywood sheet for ease of layout and assembly, and then installed into the trailer as a complete, tested module.  This module includes an Orion DC-DC 24V to 12V converter which was installed to power the trailer’s 12V lights using the 24V battery bank; a pair of Lynx Power In modular DC bus bars; and the installation’s AC output which is provided by a pair of MultiPlus 24VDC 3kW 120V Inverters/Chargers. These MultiPlus Inverter/changer units can provide peak power of 12kW – perfect for the power surge when the site’s air conditioning system starts up.

Battery Storage

Harvested energy is stored in three 24VDC Lithium LiFePO4 battery banks of 1012Ah each, bringing the total energy reserve to 72kWh. The batteries will be housed under the Power Electronics wall in an insulated wooden structure which protects them from any inadvertent metallic contact across the battery poles, whilst also having ventilation holes to dissipate heat during heavy use.

A BMV-712 battery monitor will keep track of the batteries’ performance and accounts for all the power going into and coming out of the battery bank – together with a plethora of other current and voltage-related information which it logs for inspection.  Alarms and automatic alters can be programmed to trigger actions in the event of low/high-voltage; low/high temperature; low state of charge etc. All of this information is available from the display on the BMV itself; via Bluetooth on a smart phone or other device; or from anywhere in the world using VRM – Victron Energy’s free-to-use Remote Management platform.

Backup Generator for Guaranteed Uptime

For redundancy, a 5kW gas generator will be installed in order to charge the batteries f there hasn’t been enough sun for 2 days. If the solar resource is insufficient, or energy demand is high and prolonged, the generator starts – and stops – automatically according to battery voltage. This start-up can also be triggered remotely, using VRM.

Internet access for remote monitoring of system

Remote monitoring of the system is provided by the Venus GX control panel – the communications module which sits at the heart of the system controlling the entire installation, and is connected to the internet by through a cellular SIM card or satellite. This allows MOBISMART and the client monitor system performance remotely; receive alerts in the event of a problem – change settings if necessary – and monitor the batteries’ state-of-charge. VRM – Victron Energy’s free-to-use Remote Management platform.

Breakers, Protection & Safety

All electrical protections are of course present. At the AC outlet of the inverters, long extensions have been provided to route the current to the three construction trailers which the system supplies. When traveling, these extensions are disconnected, rolled up and stored in the trailer. Everything has been designed to facilitate the installation and removal of equipment quickly and safely for future users.

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