On-demand solar PV design, cable calculations, and BS7671 compliance support for installers, businesses, and homeowners. 20 years of experience. 24–96 hour turnaround.
Whether you're an installer who needs extra design capacity, a business planning an electrical upgrade, or a homeowner wanting independent advice — we've got you covered.
On-demand design backup without the full-time overhead. 20 years from tools to design — we speak your language and deliver designs that work on site.
Independent electrical design and compliance verification for commercial projects. From EV charging to solar installations, we ensure safety and cost-efficiency.
Independent electrical advice with no sales pressure. Get a second opinion on contractor quotes, verify solar designs, or plan a rewire with confidence.
From brief to delivery in as little as 24 hours. No long contracts, no retainer required.
Upload your design files, site details, or project brief via email or our contact form. Tell us what you need.
Our experienced designer produces BS7671-compliant designs, calculations, and documentation. Most quotes confirmed within 2 hours.
Receive installation-ready drawings and documentation. Revisions included. You focus on the job, we handle the paperwork.
A full-time electrical designer costs far more than their salary. With ZESTEC, you only pay for designs you actually need.
Send us an existing solar PV design or electrical plan, and we'll review it for BS7671 compliance issues, sizing errors, and optimisation opportunities — completely free.
Book a free 15-minute call to discuss your project — or request your free design health check today.