Begin with the existing inventory
A new plan should not assume that every device must be replaced. Write down the exact models already owned, their intended use and the information available from their manuals. A similar product name or a nominal energy figure does not establish compatibility. The useful first result may be a no-buy decision or a short list of missing checks.
Compare the same task
In the R2 reference, the job is limited to refrigerator power and communication charging under named assumptions. Compare the existing setup with that job. Do not compare a smaller task with a full-house package and conclude that the smaller option is defective. The planned HOME-14 includes Power & Cold; it is not necessary to buy both.
A concrete decision record
Suppose a household already owns a station but has no reliable refrigerator-use record. The next step is to obtain the missing input and check the exact compatibility conditions, not to infer failure from uncertainty. If a measured mismatch is later established, record which requirement fails. Ask whether a limited change addresses it; do not invent a universal connection or installation procedure.
Give each unknown an owner
Keep a single record of demand, exact variants, intended operation and remaining questions. The homeowner supplies measurements and preferences. A local specialist addresses the named scope that requires their competence. A walkthrough is a separate activity and does not become an assessment merely because it is helpful.
Know when to stop
Retaining equipment is a possible outcome, not a guarantee. Incomplete evidence is not approval, and a reference is not a diagnosis for a particular house. Start with the free R2 keep/no-buy example. The Power & Cold candidate adds adaptation to the supported appliance, measured-input records and linked work, procurement and family sheets; HOME-14 adds the coupled household resources. Whether that extra work helps real people or warrants a purchase is still untested. Sales remain closed.