Grid Battery Storage Container Product

Overview

The grid battery storage container is a utility-scale battery energy storage system (BESS) packaged inside a single 20 ft ISO shipping container. It stores roughly 3.7 MWh of electricity in lithium-iron-phosphate cells and exchanges up to 1.5 MVA with the grid, providing peak shaving, frequency regulation, renewable firming, and backup. LFP chemistry is chosen for its thermal stability and long cycle life, at the cost of lower energy density than nickel-based cells.

Energy is held in six floor-standing Battery Rack units. Each rack stacks eight modules of sixteen prismatic 3.2 V / 280 Ah cells, giving a nominal DC bus near 1331 V. Rack outputs are combined by the High-Voltage DC System, which carries the high-current DC bus through contactors, fuses, and a lockable manual service disconnect to the power stage.

How it works

The Power Conversion System is a bidirectional grid-tie inverter built on an IGBT bridge with an LCL output filter. It converts battery DC to grid-synchronous AC when discharging and rectifies grid AC to charge the packs, following dispatch setpoints to within milliseconds for frequency response.

Cell, module, and rack data flow up to the Master BMS Controller, which tracks state of charge, balances cells, enforces voltage and temperature limits, and opens the DC contactors on any fault. Site-level scheduling, metering, and grid communication run from the Energy Management Cabinet, which coordinates the PCS and BMS against grid signals and a revenue-grade meter.

Because LFP cells degrade and can vent if overheated, the Thermal Management System loop circulates chilled glycol through cell cold plates to hold a tight temperature band, with electric heaters for cold starts. Safety is layered: the Fire Suppression System system watches for battery off-gassing and hydrogen with electrochemical detectors and discharges a clean agent before thermal runaway can propagate. The whole assembly sits in a rock-wool-insulated steel Container Enclosure with bonded grounding and emergency egress.', },

'hydrogen-fuel-cell': { specs: [ ['Type', 'Proton-exchange-membrane (PEM) fuel cell system'], ['Rated power', '120 kW (continuous)'], ['Cell count', '200 cells in series'], ['Stack voltage', '120–200 V DC (load dependent)'], ['Output voltage', '650 V DC bus (after boost converter)'], ['Peak efficiency', '55 % (LHV, stack)'], ['Fuel', 'Compressed hydrogen, 99.97 % purity'], ['Anode pressure', '1.5–2.5 bar(g)'], ['Operating temperature', '60–80 °C (stack)'], ['Membrane', 'Perfluorosulfonic-acid (Nafion)'], ['Catalyst loading', '0.3 mg Pt/cm² (cathode)'], ['Cooling', 'Deionised liquid coolant loop'], ['Cold-start', 'Down to -20 °C with heater assist'], ['Emissions', 'Water vapour only'], ], body: '## Overview

The hydrogen fuel cell is a 120 kW proton-exchange-membrane (PEM) power system that converts hydrogen and atmospheric oxygen directly into electricity, heat, and water with no combustion. It serves as a clean prime mover or range extender where battery energy density is insufficient, refuelling in minutes rather than charging for hours.

The heart of the unit is the Fuel Cell Stack: 200 Membrane Electrode Assembly membrane electrode assemblies interleaved with graphite Bipolar Flow-Field Plate flow-field plates, clamped between end plates and copper current collectors under tie-rod compression. Each MEA pairs a Nafion proton-exchange membrane with platinum catalyst layers and gas diffusion layers.

How it works

Hydrogen enters the anode and splits at the catalyst into protons and electrons. Protons cross the membrane to the cathode while electrons are forced through the external circuit, producing current; at the cathode they recombine with oxygen to form water. The 200 cells in series yield a load-dependent 120–200 V, which the Power Electronics boosts to a regulated 650 V DC bus through a DC-DC converter and high-voltage contactors.

Air is filtered, compressed, humidified, and metered into the cathode by the Air Supply Subsystem, whose membrane humidifier recycles product water to keep the membrane conductive. The Hydrogen Supply Subsystem regulates supply pressure and recirculates unreacted hydrogen from the anode outlet back to the inlet, purging periodically to clear nitrogen and water.

The reaction is exothermic, so the Thermal Management Subsystem pumps deionised coolant through the stack to a radiator, using an ion-exchange deioniser to keep the coolant electrically non-conductive across the cell stack. Overseeing everything, the Fuel Cell Control Unit runs stack and balance-of-plant control, monitors temperatures, and watches the ventilated Enclosure for hydrogen leaks, shutting the system down on any unsafe condition.', },

'micro-wind-turbine': { specs: [ ['Type', 'Horizontal-axis, downwind passive-yaw small turbine'], ['Rated power', '1.5 kW at 12 m/s'], ['Rotor diameter', '3.2 m'], ['Blade count', '3 (fixed pitch)'], ['Generator', 'Direct-drive permanent-magnet alternator'], ['Magnet poles', '12 neodymium poles'], ['Output', '3-phase AC, rectified to DC'], ['System voltage', '48 V DC (battery)'], ['Cut-in wind speed', '3 m/s'], ['Cut-out / survival', '50 m/s survival'], ['Yaw', 'Passive tail-vane orientation'], ['Braking', 'Electromagnetic short + mechanical disc'], ['Storage', '48 V lithium pack (24 × 18650)'], ['Charge control', 'MPPT with dump-load diversion'], ], body: '## Overview

The micro wind turbine is a 1.5 kW horizontal-axis machine for off-grid and remote power, where it charges a battery bank from the wind. A three-bladed rotor drives a direct-drive permanent-magnet alternator in a yawing nacelle; a tail vane keeps the rotor facing the wind, and a charge controller manages battery charging and over-speed protection without any gearbox.

The Rotor uses three fixed-pitch carbon-reinforced fiberglass blades on an aluminium hub behind a nose cone. The 3.2 m rotor begins generating at a 3 m/s cut-in wind and reaches rated output near 12 m/s.

How it works

The rotor turns the Permanent-Magnet Alternator, a direct-drive permanent-magnet generator whose twelve neodymium rotor poles sweep past three-phase stator windings to produce AC at a frequency proportional to wind-driven rpm. Direct drive eliminates a gearbox, the most failure-prone part of small turbines.

The whole head sits on the Nacelle mainframe casting, which carries the alternator and the Tail Assembly. The tail boom and vane passively yaw the machine into the wind, and a slip ring passes power across the rotating yaw axis so the cable never twists, supported by a yaw bearing in the tower mount.

Wild-frequency three-phase output runs down to the Charge Controller, which rectifies it to DC and runs maximum-power-point tracking to load the rotor optimally. When the battery is full or wind is excessive, surplus energy is shunted to a dump-load resistor, which also brakes the rotor. For shutdown and survival in storms, the Brake Assembly shorts the alternator phases electromagnetically and applies a mechanical disc stop. Energy is stored in the Battery Interface, a 48 V lithium pack with an integrated BMS.', },

'solar-panel': { specs: [ ['Type', '72-cell monocrystalline PV module'], ['Peak power (Pmax)', '420 Wp (STC)'], ['Cell technology', 'Monocrystalline PERC silicon'], ['Cell count', '72 cells (6 × 12)'], ['Module efficiency', '21.3 %'], ['Open-circuit voltage (Voc)', '49.6 V'], ['Short-circuit current (Isc)', '10.9 A'], ['Voltage at Pmax (Vmp)', '41.2 V'], ['Current at Pmax (Imp)', '10.2 A'], ['Max system voltage', '1500 V DC'], ['Front glass', '3.2 mm tempered low-iron, AR-coated'], ['Bypass diodes', '3 (Schottky)'], ['Connectors', 'MC4-compatible, IP68'], ['Operating temperature', '-40 °C to +85 °C'], ], body: '## Overview

The solar panel is a 420 Wp 72-cell monocrystalline photovoltaic module that converts sunlight directly into DC electricity. It is the standard building block of rooftop and ground-mount arrays, wired in series strings into an inverter. The laminate is built to survive 25-plus years of weather, hail, and thermal cycling while losing only a fraction of a percent of output per year.

The light-converting core is the Cell String: 72 PERC monocrystalline silicon cells connected in series by tinned-copper tabbing and bus ribbons. Each cell carries an anti-reflective coating that traps incoming light, and the string is laid out as six substrings of twelve cells.

Construction

The cell string is sealed inside a laminate. A Front Glass of 3.2 mm tempered low-iron glass forms the sunward face, textured and AR-coated to maximise transmission. Above and below the cells, the Encapsulant Set of EVA film melts and cross-links under heat and vacuum during lamination, potting the cells against moisture. The rear is closed by a multi-layer Backsheet that provides electrical insulation and weathering resistance.

This glass-EVA-cell-EVA-backsheet sandwich is trimmed into an anodised Aluminium Frame, whose four extruded rails join at internal corner keys and stiffen the module for wind and snow loads; toothed grounding clips bond the frame for safety.

How it works

When photons strike the silicon, they free electron-hole pairs that the cell junction separates, driving current through the series string. The string terminates in the Junction Box, an IP67 enclosure potted with silicone that houses three Bypass Diode devices, one per substring. If part of the module is shaded, its bypass diode conducts around the weak substring to prevent hot-spot heating and keep the rest of the array producing. Pre-terminated MC4 output leads carry the module's DC out for series stringing.', },

'solar-water-heater': { specs: [ ['Type', 'Evacuated-tube solar water heater (active, pumped)'], ['Collector', '20-tube heat-pipe evacuated array'], ['Tank capacity', '300 L'], ['Aperture area', '~3.0 m²'], ['Tube type', 'Double-wall borosilicate, selective absorber'], ['Heat transfer', 'Copper heat pipe + dry condenser pockets'], ['Tank inner vessel', 'Welded stainless steel'], ['Insulation', '55 mm polyurethane foam'], ['Backup heater', '2.0 kW electric immersion element'], ['Max water temperature', '85 °C (thermostat-limited)'], ['Working pressure', '6 bar'], ['Circulation', 'Wet-rotor pump, differential control'], ['Anode protection', 'Magnesium sacrificial rod'], ['Stagnation temperature', '> 200 °C (collector)'], ], body: '## Overview

The solar water heater is an active, pumped evacuated-tube system that supplies domestic hot water from sunlight, with electric backup for cloudy spells. A roof-mounted glass-tube collector harvests solar heat and feeds a 300 L insulated stainless tank through a controlled circulation loop. Evacuated tubes outperform flat-plate collectors in cold and diffuse light because the vacuum gap suppresses convective heat loss.

The Evacuated-Tube Collector is an array of twenty double-wall borosilicate evacuated tubes. Each tube carries a selective absorber coating on its inner wall and a copper Copper Heat Pipe running up its centre. Sunlight heats the absorber, vaporising the working fluid in the heat pipe; the vapour rises and condenses in a dry pocket inside the insulated header manifold, giving up its heat to the circulating water before draining back to repeat the cycle.

How it works

Heated manifold water is moved to the Storage Tank Assembly by the Circulation Assembly assembly, a wet-rotor pump backed by an anti-thermosiphon check valve and a diaphragm expansion tank that absorbs pressure swings. The Controller Assembly compares collector and tank temperatures through two probes and runs the pump only when the collector is hotter than the store, maximising useful gain and preventing night-time heat loss.

The Storage Tank Assembly holds water in a welded stainless inner vessel inside a foam-insulated steel shell, with a magnesium sacrificial anode protecting the vessel from corrosion. When solar input falls short, the controller energises the Electric Backup Heating immersion element through its own thermostat to guarantee hot water on demand. A relief valve in the Piping & Fittings protects against overpressure, and the whole collector is carried on an adjustable roof Mounting Stand.