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Information only

Calculators, guides and other content are general educational information, not engineering, electrical, legal, tax or financial advice. Results are estimates based on stated assumptions. Electrical work — especially high-voltage DC, solar arrays, EV chargers and anything connected to building wiring — must be performed by qualified, licensed people in accordance with local codes. See the Disclaimer.

Quote requests

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Contest rules

The DC Build of the Month contest is free to enter, open to people aged 18+, and void where prohibited. One entry per person per month. Entries must be the entrant's own work. Judging criteria are published on the contest page; judges' decisions are final. Prize amounts are announced at the start of each month. Winners must respond within 14 days or an alternate may be chosen. Entrants grant 9DC a non-exclusive licence to display their submission with credit. Winners are responsible for any taxes.

Acceptable use

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Intellectual property

Original text, tools, code and design are © 9DC.com. Third-party trademarks belong to their owners; see the trademark disclosure.

Links and advertising

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Liability

To the fullest extent permitted by law, 9DC is not liable for any loss arising from use of the site or reliance on its content. The site is provided "as is".

Changes

We may update these terms; continued use means acceptance.