Behind-The-Meter®  Systems

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How it works

The AMP-EL ENERGY® Bulk Energy Storage system is an integrated energy storage unit that is reliable and will be more cost effective than any other energy storage unit currently available on the market today. The system, which is currently being developed & trialed, is capable of storing energy from any renewable or non-renewable energy source such as Wind, Solar Thermal, Solar PhotoVoltaic, Hydro, Geothermal etc. reliably for peak-shaving and base-load power supply during its project life, which is well in excess of 3 to 5 times the life of conventional electro-chemical battery storage.

The system controller detects excess renewable energy (via CT clamps) and reroutes it to the hydro-pneumatic air compressor which charges a bank of compressed air cylinders. The excess heat during the compression cycle is vented to atmosphere. When the demand surpasses the renewable energy supply, the stored compressed air is then released and expanded through our Patented N-GEN® Turbine to generate the appropriate amount of electrical energy.

Benefits and features


•        low initial and whole life costs

•        low maintenance

•        consistent high performance & power availability

•        reliable, even in hostile environments

•        fast plug-and-play installation


•        environmentally tolerant, self-contained units

•        comprehensive GUI status display as standard

•        run from standard cylinders or plant ring main

•        auto compressor option for cylinder recharge

•        very low environmental impact and disposal issues


*SunStalker® System - Single and Dual Axis Solar Tracking for Roof and Ground Mount.

The main benefit of dual axis (outside the tropics) and single axis (inside the tropics), is that more energy (typically 35% for single axis and 43% for dual axis) can be created closer to the demand cycles and hence reducing the amount of energy storage required. The following is an example of a typical Tracking PV – Solar Thermal Electric system design for a daily load of 3,555 kWh.

If the 250kW of fixed PV were used to match the load, then approximately 1,273 kWh will be generated (Red line) and approximately 2,280 kWh will need to be generated through a solar thermal electric system or alternatively be produced by more PV Panels, stored in batteries or be supplied by the grid.

Graph of load profile with Fixed PV Panels

If, however, the 250 kW was placed on a dual axis tracker, then approximately 1,820 kWh would be generated and only 1,735 kWh would be required from a solar thermal electric system, or PV-Batteries or the Grid.

Graph of load profile with SunStalker® Tracking PV Panels


A direct comparison is shown below

Therefore, the real cost savings are attributable to the following benefits:

  • Energy is generated closer to “Peak” demand;

  • 30% less PV Panels required to achieve the same energy output;

  • Reduced energy cost through the partial off-set of “Peak” power;

  • Reduced cost of hybridising with solar thermal electric or additional PV and batteries;

  • Wind rated to Zones “A”, “B” and “C”;

  • Light weight construction allows roof top mounting;

  • Can be hybridised with the Amp-El Energy™ Solar Thermal Electric system for 24 hour power supply.

  • The Australian Designed and Made SunStalker® for roof and ground mount applications is currently being trialed at several sites under different conditions with newly developed Australian technology.




Single & Dual Axis Solar Tracking


SunStalker® Roof Mounted Dual Axis Solar Tracker

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Power Cap™ - The Long-Life Battery Alternative

Zero Emissions Developments is proud to announce it’s Behind The Meter® distributed energy solution for residential applications that incorporates the long life Power Cap™ System. The system has been designed to supply the daily energy needs of homes, day and night whether grid connected or grid independent from an on-site renewable solar PV system that is coupled with our long-life Graphene Supercapacitor system. Pre-commercialisation units are currently available.


Energy Storage - Power Cap

The Power Cap™ system that is superior to battery technology and up to 100 times the life


ZED’s Behind-The-Meter® Power Cap™ Solution Features and Benefits

 ZED’s Power Cap™ system can deliver many benefits over conventional electro-chemical batteries, such as:

  • Expected life is over 1,000,000 cycles which equates to approximately 25 year life in normal applications;

  • Deep cycle discharge, long duration discharge as well as fast charge and short discharge;

  • The Fast Charging capabilities eliminates the Need for Large Battery Banks;

  • The Supercapacitor bank can be charged in a few minutes without affecting cycle life. This feature delivers significant advantages in a wide range of deployments such as in electric vehicles or utility grade frequency regulation;

  • Graphene ultra-thin layers increases Energy Density over standard supercapacitors;

  • The proprietary algorithm-based balancing, charging and control circuit used, actively balances and stabilizes the system, delivers deep cycle and long duration discharge and specific energy of 115 Wh/kg. Therefore, in addition to standard fast charge / discharge usage, the energy storage system can be deployed at industry that contains high inductive loads.

  • Levellised Cost of Energy per cycle is less than one, one hundredth the cost of battery technology ($0.01 versus $0.10/kWh/Cycle);

  • High Efficiency, with a Depth-of-Discharge (DOD) of 99% and round-trip efficiency of 99.1%, the ZED Behind-The-Meter® system delivered and rated capacity are almost the same, allowing for a significant reduction in the number of Supercapacitors required when compared to systems utilizing chemical batteries, thereby lowering capital investment;

  • Cycle Life more than 100 times that of conventional battery storage, leading to Lower Cost of Ownership;

  • The cycle life of the energy storage system is 1 million cycles at 99% DOD with negligible capacity fade and impact of charge / discharge rates. Combined with very low maintenance requirements, ZED delivers power and energy at an unmatched cost per cycle;

  • Temperature tolerance enables usage in most environments. With a temperature tolerance range that is higher than electro-chemical batteries, the Power Cap™ can be deployed in extremely harsh environments without cooling or heating, resulting in less oversight and maintenance;

  • A charge retention circuit controls a small percentage of embedded Li Ion to supply current to reduce charge leakage and increase self-discharge time to 14 days;

  • These units can be paralleled to increase the total storage capacity; and

  • The unit is 100% recyclable at the end of its life.