3-Phase Distribution Boards | TPN Boards
Commercial & Industrial
Commercial & Industrial Electrical Solutions
Distribution boards, protective components and EV charging infrastructure for commercial electricians, panel builders and contractors working on bigger installations — supplied trade-first, in stock, and backed by full technical documentation.
Eco Harmony started out supplying EV chargers and electrical protection to homeowners and installers. Off the back of that, we've built up a trade-facing range that now covers three-phase distribution, modular protective devices, and multi-charger EV infrastructure — the kind of components that come up on commercial jobs, new-build fit-outs, and panel builds rather than single-socket domestic installs. Below is a quick summary of each area, with a dedicated page for the detail.
3-Phase Distribution Boards
TPN distribution boards built around a 125A 4-pole main switch with Type 2 surge protection fitted as standard, in a 1.2mm steel enclosure to BS EN 61439-3. Available across a range of way counts for anything from a small commercial sub-board to a full workshop or depot distribution setup, alongside our 3-phase 11–22kW boards for EV circuits.
View 3-phase distribution boards →Modular Components — RCBOs, MCBs, RCDs & SPDs
Din-rail protective devices stocked in the volumes and combinations panel builders actually need: RCBOs across WCED, CHINT, Garo and Bituo Technik, plus MCBs, RCDs and Type 2 surge protection devices to populate distribution boards and control panels to BS 7671.
View modular components →Commercial EV Charging
Multi-charger EV infrastructure built on the Simpson & Partners Holiday Series — MID-certified metering, RFID access control and built-in pay-per-use billing — plus Freestanding units for depot and car park layouts, and dynamic load balancing for sites running several chargers off one supply.
View commercial EV charging →Panel Builders
Board enclosures, protective devices and EV charge point controllers supplied as components for your own builds — not just finished products. Trade ordering, datasheets and compatibility guidance so you can spec and build with confidence.
View panel builder supply →BS 7671 & BS EN 61439-3
Compliant boards & components
Trade Stock
Boards, components & controllers held in the UK
Full Documentation
Datasheets & certificates on request
Frequently Asked Questions
Do you supply commercial and industrial customers, not just homeowners?
Yes. Alongside our homeowner-facing EV charger range, we stock three-phase distribution boards, modular protective components and EV charge point controllers aimed at commercial electricians, panel builders and contractors.
Can I open a trade account?
Get in touch with details of your business and typical order volumes, and we'll set you up with trade pricing and support.
Do you offer bulk or project pricing?
Yes — for multi-board fit-outs, multi-charger installations or panel-build component orders, contact us with your spec and we'll put a project quote together.
What if I need something custom?
We can offer custom builds. We have access to an enormous range of components beyond what's listed on the site — it's not possible to list them all, so if you've got a non-standard spec, get in touch and we'll see what we can put together.
Working on a commercial project?
If you've got a distribution board, panel build or multi-charger EV installation coming up, get in touch and we'll help you spec it.
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