evcc-io/evcc
Apr 2025 – Jan 2026
5 Months active
Languages Used
GoYAMLyaml
Technical Skills
API IntegrationBackend DevelopmentConfiguration ManagementAPI developmentbackend developmenttesting
duck.
PROFILE
Duck.
Over five months, Duck worked on the evcc-io/evcc repository, building and refining Octopus Energy tariff integrations to support both import and export tariffs, multi-account management, and robust API key validation. Using Go and YAML, Duck enhanced backend reliability by implementing payment-method-aware tariff selection, filtering out incorrect or ambiguous tariff data, and supporting new API key formats with strict validation and comprehensive tests. The work addressed real-world billing and configuration challenges, reduced support overhead, and improved integration security. Duck’s approach demonstrated depth in API integration, backend development, and configuration management, delivering features and fixes that improved accuracy and maintainability.
Overall Statistics
Feature vs Bugs
57%Features
Repository Contributions
7Total
Bugs
3
Commits
7
Features
4
Lines of code
449
Activity Months5
Your Network
153 peopleWork History
January 2026
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for evcc-io/evcc focused on enhancing API key management to increase security, compatibility, and reliability for external integrations. Delivered a feature that enables new API key formats and ensures strict validation, complemented by tests that verify correct behavior and guard against regressions. This work improves onboarding and reduces configuration errors for partners relying on updated key formats.
1 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for evcc-io/evcc focused on enhancing API key management to increase security, compatibility, and reliability for external integrations. Delivered a feature that enables new API key formats and ensures strict validation, complemented by tests that verify correct behavior and guard against regressions. This work improves onboarding and reduces configuration errors for partners relying on updated key formats.
January 2026
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Delivered Octopus Energy export tariffs support to enable end-to-end energy management for import and export tariffs, aligning tariff type queries with Octopus API to enable enhanced cost optimization and reporting.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025: Delivered Octopus Energy export tariffs support to enable end-to-end energy management for import and export tariffs, aligning tariff type queries with Octopus API to enable enhanced cost optimization and reporting.
September 2025
1 Commits
Sep 1, 2025September 2025 (evcc-io/evcc): Focused on reliability improvements in tariff discovery. No new features released; implemented a critical bug fix to exclude export tariffs and require an import tariff during tariff discovery, improving accuracy of tariff selection and preventing misbilling. Impact: more robust tariff handling across Octopus tariffs; reduced downstream errors and support burden. Skills demonstrated: Go code changes, algorithm refinement, error handling, and incremental release discipline.
1 Commits
Sep 1, 2025September 2025 (evcc-io/evcc): Focused on reliability improvements in tariff discovery. No new features released; implemented a critical bug fix to exclude export tariffs and require an import tariff during tariff discovery, improving accuracy of tariff selection and preventing misbilling. Impact: more robust tariff handling across Octopus tariffs; reduced downstream errors and support burden. Skills demonstrated: Go code changes, algorithm refinement, error handling, and incremental release discipline.
September 2025
May 2025
2 Commits • 1 Features
May 1, 2025May 2025 (2025-05) delivered targeted tariff management improvements for evcc-io/evcc, focusing on accuracy, reliability, and multi-account support for Octopus Tariff. The work comprises two primary outcomes: (1) a bug fix for Tariff API Payment Method Filtering, ensuring only tariff entries that match the applied payment method are processed; this prevents incorrect tariff data when the API returns entries with different payment methods; and (2) a new multi-account capability for Octopus Tariff, allowing users to specify an account number to resolve ambiguity and ensure the correct account's tariff information is used. These changes improve billing accuracy, reduce user support issues, and enhance interoperability with Octopus Energy accounts. Demonstrated a robust approach to API data handling, account resolution, and traceable changes via commits.
May 2025
2 Commits • 1 Features
May 1, 2025May 2025 (2025-05) delivered targeted tariff management improvements for evcc-io/evcc, focusing on accuracy, reliability, and multi-account support for Octopus Tariff. The work comprises two primary outcomes: (1) a bug fix for Tariff API Payment Method Filtering, ensuring only tariff entries that match the applied payment method are processed; this prevents incorrect tariff data when the API returns entries with different payment methods; and (2) a new multi-account capability for Octopus Tariff, allowing users to specify an account number to resolve ambiguity and ensure the correct account's tariff information is used. These changes improve billing accuracy, reduce user support issues, and enhance interoperability with Octopus Energy accounts. Demonstrated a robust approach to API data handling, account resolution, and traceable changes via commits.
April 2025
2 Commits • 1 Features
Apr 1, 2025Monthly summary for 2025-04: Focused on stabilizing the Octopus tariff integration in evcc and expanding tariff coverage with a payment-method aware flow. Implemented non-Direct Debit tariff support and fixed an authentication issue related to the API key parameter, improving reliability and customer value.
2 Commits • 1 Features
Apr 1, 2025Monthly summary for 2025-04: Focused on stabilizing the Octopus tariff integration in evcc and expanding tariff coverage with a payment-method aware flow. Implemented non-Direct Debit tariff support and fixed an authentication issue related to the API key parameter, improving reliability and customer value.
April 2025
Activity
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Quality Metrics
Correctness91.4%
Maintainability85.8%
Architecture82.8%
Performance80.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
GoYAMLyaml
Technical Skills
API IntegrationAPI developmentBackend DevelopmentConfiguration Managementbackend developmenttesting
Repositories Contributed To
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