Expandable Heat Pump Consumer Unit with Spare Ways – WME16/SPH
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £80+
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The WME16/SPH is a 16-way expandable heat pump consumer unit designed for larger domestic installations where multiple low-carbon technologies are planned. It provides dedicated heat pump protection while offering ten spare usable ways for future circuits such as EV charging, solar PV, battery storage or auxiliary supplies. Supplied factory-assembled with...
The WME16/SPH is a 16-way expandable heat pump consumer unit designed for larger domestic installations where multiple low-carbon technologies are planned. It provides dedicated heat pump protection while offering ten spare usable ways for future circuits such as EV charging, solar PV, battery storage or auxiliary supplies.
Supplied factory-assembled with a 100A main switch, Type 2 surge protection device (SPD) and Type B RCD, this board delivers compliant protection for inverter-driven heat pumps while significantly reducing installation time on site.
Installer note: A strong choice for properties installing a heat pump now, with EV charging, solar PV or battery storage planned as future upgrades.
- Expandable heat pump consumer unit with high spare capacity
- Factory-fitted 100A main switch
- Integrated Type 2 surge protection device (SPD)
- Type B RCD for inverter-driven heat pump protection
- 10 spare usable ways for future expansion
- 16-way metal enclosure
- 18th Edition Amendment 2 compliant
Built for Larger, Multi-Technology Homes
The WME16/SPH is ideal for modern homes adopting multiple electrical technologies over time. Its higher spare capacity allows additional circuits to be added later without replacing the consumer unit, helping installers deliver long-term, future-proof solutions.
This board is particularly suited to larger properties where space, circuit separation and expansion headroom are critical.
Related Expandable Consumer Units
| Product | Spare Usable Ways | Best For |
|---|---|---|
| WME10/SOL1 | Solar-only | Dedicated domestic solar PV installs |
| WME10/SPH | 4 | Compact future-ready installs |
| WME12/SPH | 6 | Heat pump + single upgrade |
| WME14/SPH | 8 | Medium-to-large domestic installs |
| WME16/SPH | 10 | Large homes / multi-tech setups |
| WME18/SPH | 12 | High-capacity domestic systems |
| WME22/SPH | 16 | Maximum expansion & future-proofing |
Who should choose a 16-way expandable board?
This board is ideal for larger domestic properties planning multiple low-carbon technologies over time.
Why is a Type B RCD included?
Heat pumps use inverter-driven compressors that can generate smooth DC leakage, requiring Type B protection.
Can spare ways be used later?
Yes. Additional circuits such as EV chargers or solar PV can be added without replacing the consumer unit.
Is the unit supplied pre-wired?
Yes. The consumer unit is factory-assembled to simplify installation and reduce on-site labour.
- Product Type: Expandable Heat Pump Consumer Unit
- Main Switch: 100A
- RCD Type: Type B
- Surge Protection: Type 2 SPD
- Enclosure Size: 16-way
- Spare Usable Ways: 10
- Enclosure: Metal
- Application: Domestic heat pump & renewable expansion
This consumer unit is supplied factory-assembled to reduce installation time and minimise wiring errors. Final connection and commissioning must be carried out by a qualified electrician.
- Install in accordance with BS 7671 (18th Edition Amendment 2)
- Keep SPD earth connections as short as possible
- Confirm Type B RCD suitability for the connected heat pump
- Spare ways can be populated later as new circuits are added
- Suitable for indoor domestic installations
