
ABG Real Estate Management has entered into a partnership with Sunday Power to develop solar and battery projects across its property portfolio.
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The first project has been completed at Bedriftsvegen in Skien, where a comprehensive energy upgrade has lifted the building's energy rating from E to A. Measures include a new roof, additional insulation, technical upgrades, local energy production and energy storage. Isola Solar served as the solar installation contractor and project manager.
The initiative is part of ABG Real Estate Management's approach to active portfolio management, with the aim of reducing energy consumption, strengthening the attractiveness of its buildings and creating long-term value for investors.
Attractive buildings for tenants — value creation for investors
Tenants are increasingly seeking buildings with lower energy consumption, documented sustainability credentials and more predictable operating costs. For ABG Real Estate Management, energy upgrades are therefore about making buildings more attractive to tenants while strengthening the long-term value of the properties for investors.
"This is about far more than solar panels and batteries. When we lift a building from E to A through a comprehensive energy upgrade, tenants get lower and more predictable energy costs, access to local renewable energy and a more resilient energy supply. That makes the buildings more attractive to tenants, gives us a stronger position in lease renegotiations and strengthens long-term value creation for investors," says Jonas Jevanord, CEO & Partner at ABG Real Estate Management.
Improved energy ratings, lower energy consumption and a reduced carbon footprint also position properties more favorably with lenders, and can contribute positively to conversations about green financing.
Lifting a building from E to A
The property at Bedriftsvegen is home to tenants including Bravida, Huseby, Monter and Autobudget. Through the upgrade, tenants benefit from a building with a higher energy standard, improved indoor climate and more predictable energy costs.
The scope of the project stands out for the number of measures carried out simultaneously: a new roof, additional insulation, technical upgrades, local energy production and energy storage. Together, these have reduced the building's energy consumption and lifted its energy rating from E to A.
The project was carried out in collaboration with Lapsen & Co, the property's technical manager, which supported ABG Real Estate Management as owner's representative throughout the project.
Investing in battery storage
As part of the partnership, ABG Real Estate Management has also signed an agreement with Sunday Power on battery storage. The batteries will contribute to better utilization of local energy production, increased flexibility in energy use and new opportunities in the energy market.
The collaboration is structured through the Solar as a Service and Battery as a Service models, under which Sunday Power is responsible for analysis, engineering, financing, construction, operations and market optimization.
"Solar energy and batteries are no longer just about sustainability. They can reduce energy costs, improve energy ratings and create new revenue opportunities. We are seeing more and more property companies wanting to take a more active role in the energy market," says Johan A. Asplin at Sunday Power.
The first of several projects
The Skien project is the first of several energy upgrades ABG Real Estate Management is working on in 2026. Additional buildings are currently in the planning and execution phases, with solar energy, battery storage and other energy upgrades as central elements.
"After a thorough evaluation of the market, we have now established partnerships with solid players that make it possible to carry out projects like this efficiently and at scale across the portfolio," says Jevanord.

