Peak demand and energy arbitrage
Battery sizing and business case for lowering peak demand charges and moving energy use into lower priced periods.
Business cases, feasibility and solution engineering for commercial sites and developments.
Work areas
Solar optimisation
Storing midday solar for use at the evening peak, and sizing solar and storage together.
Constrained connections
Storage, load management or a staged connection to get supply on sooner and at lower cost than a network upgrade.
Battery enabled vehicle charging
Fleet and depot charging where the existing connection is the limit, with a battery supplying the charging peaks.
Energy centres for developments
Central plant for villages, subdivisions and mixed use sites that reduces the connection the development needs.
Civil engineers and developers
Load estimates, connection strategy, plant space and coordination with the network company.
One project space
Each engagement runs in a secure project space in ASKA Tungsten. Interval data, drawings, network correspondence, model runs and reports are held in one place, with a register of every document issued and the actions and decisions that follow.
The client, their engineers and the developer work from the same record, and it stays with the project into construction and operation.
- Data room for interval data, drawings and correspondence
- Document register with every revision issued
- Actions, decisions and milestones tracked to close
The model carries into operation
The model built for the business case is the same engine that runs the battery once it is installed. Savings are measured each month against the figures in the original report, on the same tariff and the same assumptions.
When results move away from the model, the record shows why: a tariff change, a change in site load, or the battery itself.
- One engine for the study and for daily dispatch
- Monthly report against the original business case
- Every figure traced to its tariff and its run
Consulting and engineering
Feasibility
Whether storage, solar or a change to the connection suits the site, and what it would save.
- Half hourly data and the network tariff, with logging where data is missing
- Options modelled in ASKA Tungsten
- A report with the cost, savings and assumptions of each option
Business case
The chosen option worked up for an investment decision.
- System sized and priced for the site
- Payback, NPV and IRR, with and without funding
- Funding applications
Network support
Work with the network company on the site's connection and charges.
- Contracted capacity checked against the site's data
- Connection applications for batteries and solar
- Queries on network charges and capacity
Solution engineering
The system designed and specified to be built.
- Single line diagrams
- Plant layout and general arrangement drawings
- Equipment specification
Recent work
Energy centre
Greenfields community development
Energy centre design that holds the development to a managed 450 kVA connection with storage, in place of about 770 kVA of unmanaged demand.
Business case
Coolstore, South Auckland
Storage sized to seasonal refrigeration peaks, with a modelled payback under 5 years.
Feasibility
Retirement village, Waikato
Battery storage modelled on the village's half hourly data and network tariff.