Cost: photovoltaic self-consumption control
Compare assessment, measurement, device control, wiring, setup and follow-up. Separate control retrofit from a complete PV installation. Neither self-consumption rate nor payback is guaranteed without defined profiles, tariffs and measurement boundaries.
Editorial update on 18 September 2026
Itemise the proposed system
Request relevant measurement points, controller, interfaces, wiring, protection and installation. Name controlled equipment and enabled functions. Separate reused equipment from additions.
Calculate net benefit
Value avoided variable purchases, then deduct forgone export revenue and added costs. Include software subscriptions, maintenance and losses. Diverting energy to a resistance heater instead of another heat source also requires comparison of the heat service delivered.
Compare measurable alternatives
Assess unchanged operation, simple scheduling and proposed control using the same profile. Battery storage is a separate option with cost and losses. Specify reported indicators, data access and tuning visits. Inclusion on the installation invoice alone does not establish grant eligibility.
The three budget levels
Where your money goes
- MeasurementOn quotationData and metering points.
- ControlOn quotationController and compatible interfaces.
- InstallationOn quotationWiring, setup and tests.
- Follow-upOn quotationData, adjustments and recurring fees.
What makes the price vary
Profile
Surplus and flexible usage.
Compatibility
Models and communication.
Objectives
Comfort, priorities and manual override.
Running cost
Subscriptions and maintenance.
Indicative scenarios
No grant is deducted from the budget shown here. If a quote mentions support, request the exact scheme and confirmation of your eligibility before including it in financing.
Frequently asked questions
Should I target the highest possible percentage?
Not through unnecessary consumption. Compare useful service, net benefit and demand coverage.
Does load shedding automatically use solar surplus?
No. Demand limiting and surplus use are different functions; ask what is provided.
Will control work without Internet?
It depends on equipment and configuration. Ask about local operation, limits and outage behaviour.
Is a battery mandatory?
No. Assess control and storage separately; no demand-coverage rate is universal.
Your exact price, in 2 minutes
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