Large New Home with High Cost of Grid Connection

off grid battery storage

Objective:

Had a cost of connection, which encouraged him to explore off grid. New build home with 2 semi-detached dwellings (both occupied). Needed a large capacity and robust system to deal with a large potential demand.

As an accountant understood the benefits/economics of owning your own power station supply.

Load Analysis:

51-45kWh average daily winter/summer demand; 16.5kW design surge

Site Considerations:

Large shed available for optimal system installation

System Design:

  • OEA Comprehensive 160-48 System – 16kW 1-phase output
  • OEA Adapt mount – install in shed
  • 136kWh sealed gel battery storage (made to order)
  • 3kW Monocrystalline solar array flush + optimally tilted on shed roof – yielding an estimated 119% of average demand, and 90% in winter
  • 9KVA backup generator (autostart)

Off-Grid Solar EnergyBox

off grid solar array

Objective:

Wanted power on site before family home and shed build commences. Had strong sustainability motivations. The system was required to power a shed initially and a house later on.

Load Analysis:

22-24kWh average daily winter/summer demand; 10.2kW design surge

Site Considerations:

No infrastructure available. Solar ground frames + self contained EnergyBox required

System Design:

  • OEA Complete 130-48 System – 13kW 1-phase output
  • OEA EnergyBox System – install under solar ground frames
  • 79kWh sealed gel battery storage
  • 5kW Polycrystalline solar array on ground frames – yielding an estimated 168% of average demand, and 123% in winter

No Electricity Bills

Solar panel installation

Objective:

Strong green motivations and also to negate electricity bills.

Was very keen to incorporate the system design into the home. Actively involved throughout planning, and this provided an excellent integrated result.

Load Analysis:

14.2-17.5kWh average daily winter/summer demand; 5,2kW design surge

Site Considerations:

Custom built equipment room, and large optimised solar roof area

System Design:

  • OEA Grid Autonomy 60-48 (Import Only) System – 6kW 1-phase output
  • OEA Adapt mount – install in plant room
  • 31kWh sealed gel battery storage
  • 5kW Polycrystalline solar array on north roof surface – yielding an estimated 120% of average demand, and 73% in winter

Nitmiluk National Park Katherine

NT battery storage

Objective:

High cost of connection for grid power, and a preference towards sustainable energy

Load Analysis:

15.3-19.6kWh average daily winter/summer demand; 6kW design surge

Site Considerations:

Optimal solar roof area and equipment room being built in preparation

System Design:

  • OEA Complete 80-48 System – 8kW 1-phase output
  • OEA Adapt mount – install in shed
  • 53kWh sealed gel battery storage
  • 7kW Polycrystalline solar array on roof – yielding an estimated 150% of average demand, and an excellent 126% in winter

6KVA backup generator (autostart)

Sheep Station Diesel Offset

remote battery storage system

Objective:

The station was running a large, inefficient diesel generation system 24/7 for their power supply, the renewable off-grid installation goal is significantly reduce generator operation costs and provide increase power self sufficiency for the the remote site.

Considerations included detailed load analysis under multiple occupation scenarios (Eg. Shearing) and understanding the most suitable solar and battery equipment locations given the large and complex power distribution network.

System Design: 

The system included robust system components with suitable tolerances for the harsh, hot and dusty conditions of the site. A diesel generator was incorporated into the system as a backup power source when required.

  • 2 x SMA SI8.0 Inverter Chargers
  • 79kWh Sonnenschein Battery Storage
  • 11.5kW Trina Solar 260W Modules
  • SMA SMC10000TL Solar Inverter
  • SMA SB5000TL Solar Inverter
  • 20kVA Diesel Generator

Project Outcome:

After the installation, fuel savings will achieve a return on investment in as little as 4 years. Additional benefits included massive reduction in onsite noisefromthegenerator,andtheneed to transport large volumes of diesel to the site. The system requires minimal user maintenance, and has made the property far easier to manage and operate for the client.

Not-For-Profit Mini-Grid

Off grid solar installers

Objective & Site Considerations:

The requirement for a renewable power solution for this project was primarily to reduce the on-going fuel consumption and maintenance costs of the remote facility. In addition, the promotion of clean and sustainable energy sources was a factor in the choice of the power system investment.

At peak occupancy the property accomodates 40 people for a short time, but for most of the year there is only one or two people on site.

The power system for this not-for-profit organisation would be funded by a private investment trust.

System Design: 

Property loads included pumps, workshop and office equipment, cooking equipment, fridges/freezers, and lighting.

The desert-like conditions dicated a choice of reliable and robust soalr modules, and the pre-assembled equipment container included passive cooling features.

  • 128kWh Battery Energy VRLA batteries
  • 52x Tindo Solar 250W Modules (18kW)
  • 44kVA Kohler Diesel Generator
  • 6 x SMA SI5048 Inverter Chargers
  • 3 x SMA SMC6000 Solar Inverters

Project Outcome:

Apart from the long-term financial and environmental benefits of the renewable mini-grid system, the property is now much quieter with reduced noise pollution removed, and cleaner with less fuel & oils kept on site. The diesel fuel savings from the installation of the system will have a payback of roughly four years.

“The consultation, support and service during the development of speci cations for the plant was exceptional. The standard of workmanship on the plant is outstanding. The installation whilst carried out in very trying conditions, was first-rate.” – John Shepherd, Operation Flinders Foundation

Remote Train Monitoring System

Solar Ground Mount Array

Objective:

An off-grid system was required to power trackside monitoring and computer equipment 24/7. The harsh conditions and remote location meant that the power system’s reliability, robustness, and redundancy was critical to maintain uninterruptible power.

Site Considerations:

Installation crews would be required to meet rigorous client-specific safety training and conduct detailed pre-planning before accessing the site. The equipment needed to be capable of withstanding temperatures commonly higher than 45°C during summer.

System Design: 

  • 2 x SMA SI6.0 Inverter Charger
  • 32 x Tindo Solar 250W Modules
  • 2 x SMA SB4000TL Solar Inverters
  • 2 x 48V PVV770 BAE Battery Banks
  • SMA Webbox Remote Monitoring

Project Outcome:

After two years of operation the system has not required a technician visit. Remote monitoring allows assessment of system performance and proactive addressing of any system warnings before they become an issue.

“The CEO personally asked for a brief to be presented to the company board in the US on the outcomes of the project. Feedback was extremely positive. We cannot be more happy. Good job, well done!”