Frequently Asked Questions

Technical FAQ

Our batteries self-discharge at a rate of 2%-3% per month.

Yes it is! We have a regular power conversion system (PCS) and hybrid PCS available.

Yes, we are. We own the Intellectual Property of system design, certificate, patent and we arrange the sourcing and procurement. We outsource manufacturing and manage the manufacturing process, control the quality and provide O&M by ourselves.

To design a BESS we use a “Specs Form” to collect the info needed for the project/application and then we create the specs sheet for the specific design. Skip the waiting line and fill one out here.

For DC side output, the efficiency is up to 98%. For AC side output, the efficiency need to consider the PCS efficiency, which is: System efficiency = BESS efficiency * PCS efficiency ex) BESS eff=98%, PCS eff=96.5%, System eff=98%*96.5%=94.6%
It depends on battery situation, DOD battery cells have a larger capacity than competition. 10% would be the proper discharge level, 90% max vs 86% competition.

We call charge/discharge rate as ‘C rates’. The calculation of ‘C rate’ is ‘charge & discharge power/capacity’.
For example, a 100kWh battery discharge at a power of 100kW, the battery discharge rate is 1C meaning the battery will be fully discharged after one hour.
Our BESS can reach up to 1C charge and discharge rate. Our recommended charge/discharge rate is 1C/0.5C, which is required by the majority of our clients.

For 0.5C/1C discharge/charge rate, our battery cell lifecycle can reach up to 86% Depth of Discharge at 4000 charge/discharge cycles, and 80% at 8000 charge/discharge cycle.
For 1C/1C discharge/charge rate, our battery cell lifecycle can reach up to 80% Depth of Discharge at 4000 charge/discharge cycles.

State of Charge (SOC) is the available percentage of energy of battery. Take our cellphones as example, the percentage of available power is the SOC.

It depends on the application, We are speaking with different EPS partners. When filling out a specs form, please let us know the application of your project/site. For example, is it a micro-grid? What is the energy storage used for? Our system can be integrated into SCADA (Supervisory Control and Data Acquisition).

We’ve designed BESS’s connected with 600V, 3ph or higher mid-voltage system such as 27.6KVA. We can provide transformer if required and some sample SLD (Single Line Diagram).

Mostly 3ph, due to the limitation on the inverters – especially for high power rate. It could be used as single phase as well – it’ll just have some waste on output power rate though.

Safety FAQ

Our products pass the Certificate of UL 9540 / UL 9540A (BESS) UL1973(battery pack), UL1741(PCS) and UL50 (enclosure), UN38.3. Our existing battery pack design passed more than 30 safety experiments from two departments, and passed the North American safety certification. The battery pack also passed a UL 9540 extreme high temperature thermal runaway test, which does not ignite in high temperature environment and has a high safety index.

In the fire protection technology, we are conducting a number of research and development, such as the fire and explosion protection design applied in the mining industry, which will be applied to our battery pack design using a pipeline connected safety management method. When the power system detects abnormal heat or voltage abnormality of a battery pack, the pipeline communication control device will separately open the shunt solenoid valve of the battery pack and the flame retardant liquid in the fire extinguisher without disturbing other battery packs. The fire-fighting gas is separately delivered to the battery pack through the shunt pipe of the external pipe, preventing the thermal runaway from spreading to other battery packs, thereby avoiding system fire hazard.

For outdoor system there is no issue for NFPA855 compliance.
The NFPA855 compliance is relevant when there are indoor systems. The issue with the system capacity is it’s limited space – i.e. you can only have 600kWh installed together and to install another 600kWh needs to be 1m away. In these cases, need to contact the local facility to figure out the layout of the system. Not an issue of NFPA compliance when our system has passed the certification.

There will be smoke sensor within the container and temperature sensors within the battery packs and container to check on fire issue. We are also looking at a new technology-based sensor, which could prevent the fire from happening based on detecting and controlling of hydrogen before the cell catches fire in advance.
Remote monitoring system will let the owner receive info about whether system’s caught fire remotely through the fire suppression sensor and temperature sensor. System alarm will also record them. On local control side it will mostly rely on the fire suppression system itself, which will be turned on if anything is detected. We can also add the control logic on if the temperature within battery is too high, then turn on the fire suppression system – the issue will be that the communication won’t be faster than the communication within the fire suppression system itself. Only the temperature sensor is not really a reliable way to define whether there is fire.

UL certification is one of the highest level of safety certificate for Battery Energy Storage product in the world. All the battery packs/modules (with BMS) and inverters are UL listed (CSA approved), but we have not done the UL certification for the overall system since each client has different system requirements on each site. If you need system certification, we will help get UL9540 certification for site inspection from either QPS, CSA, UL or ETL, as we have done for other projects in Canada.

Yes, our BMS is built in and certified together with battery packs and modules.

We can set the up-limit of the charge level through our proprietary BMS.

During the production, the battery mostly are charged and discharged 8 – 15 cycles based on the battery quality and system consistency.

Our outdoor cabinets meet the requirements of NEMA 3R, which includes the IP55 water proof testing, anti-corrosion testing, and more.

No. BESS by itself doesn’t emit any carbon emission, even in case of a fire situation we could choose NOVEC 1230 type of fire extinguisher, which uses enviromentally friendly extinguishing fluid. Beyond, it will help reduce GHG emission if used with other renewable sources.

Our Battery Management System has passed UL certification and based on the test results the function reliability of our management system is acceptable. For our battery side, we’ve done long-term charging/discharging tests to make sure the performance is up to standards.

Sales FAQ

It depends on: the Application, kWh, the system specs, financing/leasing/payment terms, and many other variables.

It depends on the application and the cost/benefit analysis, we see a lot of cases with unlevered IRR more than 10%-12% especially with high electricity price, good solar or wind condition or high diesel cost etc.

We have multiple locations, modules and packs are manufactured in China, enclosure could be from China and Canada and our systems are assembled in Canada, UK and US.

We offer leasing solutions through our financial partners.
The eligibility and cost depend on the profile of the handling (the lease) company for the leasing partner to do its due diligence.
Basic info to start off with: company’s name, industry in, business description, years in business, financial standing, the annual project(s) volume of leasing, if it’s a one off sale or multiple sales.
For more information on other payment options, click here.

We have several partners working for different use cases, such as SNC Lavalin, Siemens and other small brands.

Service & IP FAQ

We offer a free 2 year warranty. We also have an optional 5- or 10-year extended warranty.

We offer maintenance and on-site technical and monitoring service. That includes the technical inspection, charge and discharge test, and consumables inspections. We also provide optional 5 and 10 year extension service on good price.

We applied US IP, they have two different types, Utility IP and design IP. Our IP is a Utility IP.

the “Dual-Equilibrium”™ balancing technology (a hardware and software device to significantly extend the life-cycle of the BESS)

This technology is for the battery cell equilibrium. The State of Charge (SOC) unbalance in a battery pack could significantly influence the battery pack lifetime. Therefore, the balancing or equilibrium is required to ensure the battery lifetime. Currently the equilibrium technology widely used is passive equilibrium method, which is stable but low efficiency. Our technology combines active and passsive equilibrium method which can bring us a higher efficiency battery equilibrium method and a longer battery life.

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