/ The Result
137 kWp of PV, and 750 kWh battery reduce costs by 27%.
Our modelling demonstrated that combining 137 kWp of PV with 750 kWh battery storage system would reduce the hotel’s energy expenses by 27%. The solution would displace energy purchased from the grid, and reduce peak energy demands, reducing lines charges by 33%. The capital investment internal rate of return was >11%.
We are currently working with Edgewater to design and implement the solution.
750 kWh
2hr battery system
xx%
Reduction in lines charges
xx%
Estimated savings from solar and batteries
/ Challenge
A Popular Hotel Looking for Creative Ways to Reduce its Power Bills
Standing on the shores of Lake Wanaka, Edgewater Hotel has been an idyllic location for travellers to absorb the lake’s natural beauty since its inception in 1986. As it undertakes scheduled refurbishments, the hotel is looking to capitalise on the opportunities presented by renewable energy to reduce the costs of sourcing electricity from the national grid.
Edgewater’s electricity costs were being driven as much by network charges as by energy consumption — lines made up ~42% of the total, with Control Period Demand (CPD) charges a major contributor. Electricity supply contract renewal was, and significant line charges increases in 2026 pricing were expected to further increase operating costs.
Facing large increases in electricity retail and network costs, Edgewater wanted to quantify the benefits of PV and Battery technology.
/ Our approach
Edgewater Needed to Quantify the Business Case Before Investing.
Facing large increases in electricity retail and network costs, Edgewater sought Revolve’s expertise to quantify the benefits of PV and Battery technology.
/01
Solar and Battery Business Case
To identify the opportunities for savings, Revolve completed a detailed analysis of electricity load profiles, network tariff data and retail electricity pricing.Revolve built a clear business case for the investment into onsite energy generation and storage. Detailed modelling of the site’s load profile, local weather conditions, and current and future electricity and lines tariffs, was used to establish future costs and savings.
Revolve’s monitoring platform is being used to validate site peak demand characteristics and inform the final design of the systems.
Revolve is working with Edgewater to implement the solutions.
Implementing the Solar and Battery
Revolve is working with Edgewater to design and implement the battery and solar system.
/ Results
Real Projects. Real Outcomes.
We help businesses and community groups realise their renewable energy goals. Take a look at our projects to find out how.
