Renewable energy is an important component of reducing CO₂ emissions. However, green energy products for professional property portfolios differ considerably in evidence quality, costs and additional climate impact. Owners, asset managers and property managers should therefore assess which product fits their objectives and requirements.
Green electricity: distinguish origin from impact
For grid electricity, renewable origin is documented through an accounting system. Guarantees of origin show that a corresponding quantity of electricity was generated from renewable sources. They do not determine which electricity physically reaches a building.
A guarantee of origin alone does not demonstrate additional renewable generation capacity either. Assessment therefore depends on the actual generation, product criteria and traceable use of the certificates. The German Environment Agency explains guarantees of origin and electricity labelling.
Compare product quality and costs transparently
Labels and certifications can provide guidance. Depending on the standard, they may consider generation technology, plant age or additional support criteria. Regional origin is a separate characteristic and does not replace assessment of the product's other quality features.
Certain origin or quality requirements can create additional costs. The key is to compare specific offers: which characteristics are guaranteed, how are they evidenced and what value do they provide for the portfolio? A green product does not automatically meet regulatory or ESG requirements; the applicable criteria must be assessed separately.
PPAs: link long-term procurement to specific generation assets
Power purchase agreements (PPAs) contractually link electricity procurement to specific generation assets. They can secure long-term prices for agreed volumes or price components and make origin more transparent. Their impact must be assessed at project level: a contract may enable a new plant to be built or support continued operation of an existing one.
However, generation profiles and consumption do not always match. Residual electricity, volume deviations and other contractual costs still need to be assessed. The dena Green PPA pricing guide explains these cost and risk factors. For larger portfolios, a bespoke PPA structure may be appropriate where duration, demand and risk-bearing capacity align.
Gas: distinguish biogenic products from offsetting
Biogenic gases and natural gas products with CO₂ offsetting are different approaches. For biogenic products, feedstocks, production, supplied share and evidence are particularly important. Price, availability and emissions impact can vary substantially.
With offsetting alone, the fossil fuel remains; climate projects aim to compensate for emissions elsewhere. This does not replace emissions reductions at the building. The Energy Efficiency and Climate Protection Networks Initiative factsheet explains these differences. General claims of climate neutrality are therefore not a sufficient basis for a decision.
Choose the right option for the portfolio
Selection begins with consumption, the procurement framework and specific sustainability objectives. Origin, additional benefits, evidence, costs and contractual risks should then be assessed together. The approach of rational energy procurement provides a structured basis for decisions.
NeoBid helps assess, select and implement suitable energy products — from green electricity tariffs to long-term PPA structures. Transparent market comparisons help align commercial requirements and sustainability objectives.
