Expandable Heat Pump Consumer Unit with Spare Ways – WME10/SPH
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £80+
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The WME10/SPH is an expandable heat pump consumer unit designed for installers who want to future-proof domestic properties. Built into a compact 10-way enclosure, it provides dedicated protection for a heat pump while leaving four spare usable ways for additional circuits such as EV charging, solar PV, or battery storage....
The WME10/SPH is an expandable heat pump consumer unit designed for installers who want to future-proof domestic properties. Built into a compact 10-way enclosure, it provides dedicated protection for a heat pump while leaving four spare usable ways for additional circuits such as EV charging, solar PV, or battery storage.
Supplied factory-assembled with a 100A main switch, Type 2 SPD, and Type B RCD, this unit delivers compliant protection for inverter-driven heat pumps while reducing on-site wiring time. The spare ways allow further technologies to be added later without installing additional consumer units.
Installer note: Ideal for properties where a heat pump is being installed now, with plans to add EV charging or solar at a later date.
- Expandable heat pump consumer unit with spare usable ways
- Factory-fitted 100A main switch
- Integrated Type 2 surge protection device (SPD)
- Type B RCD for inverter-driven heat pump protection
- 4 spare usable ways for future circuits
- Compact 10-way metal enclosure
- 18th Edition Amendment 2 compliant
Designed for Future Expansion
The WME10/SPH is suited to domestic heat pump installations where additional low-carbon technologies may be added later. The spare usable ways allow installers to integrate EV chargers, solar PV, or battery storage without replacing the consumer unit.
If only a single heat pump circuit is required with no future expansion planned, a dedicated heat pump board may be sufficient. For larger properties or higher expansion requirements, larger expandable boards are available.
Related Expandable Consumer Units
| Product | Usable Ways | Best For |
|---|---|---|
| WME10/SOL1 | Solar-only | Dedicated domestic solar PV installations |
| WME10/SPH | 4 spare ways | Compact future-ready heat pump installs |
| WME12/SPH | 6 spare ways | Heat pump + EV or solar expansion |
| WME14/SPH | 8 spare ways | Medium-size domestic systems |
| WME16/SPH | 10 spare ways | Larger homes or multiple future circuits |
| WME18/SPH | 12 spare ways | High-capacity domestic installations |
| WME22/SPH | 16 spare ways | Maximum expansion & multi-technology installs |
What makes this consumer unit expandable?
The unit includes spare usable ways, allowing additional circuits such as EV chargers or solar PV to be added later without replacing the board.
Why does this unit use a Type B RCD?
Type B RCDs are required for inverter-driven loads such as heat pumps, where smooth DC leakage may occur.
Is this suitable for EV chargers?
Yes. Spare ways can be used to add EV charging circuits where appropriate protection is installed.
Is this supplied pre-wired?
Yes. Internal components are factory-fitted to reduce on-site wiring and installation time.
- Product Type: Expandable Heat Pump Consumer Unit
- Main Switch: 100A
- RCD: Type B
- Surge Protection: Type 2 SPD
- Enclosure Size: 10-way
- Usable Spare Ways: 4
- Enclosure: Metal
- Application: Domestic heat pump & future renewable installs
This consumer unit is supplied factory-assembled to reduce installation time. Final connection and commissioning must be completed by a qualified electrician.
- Install in accordance with BS 7671 (18th Edition Amendment 2)
- Ensure SPD earth connection is as short as possible
- Verify Type B RCD suitability for the connected heat pump
- Spare ways can be populated later as additional circuits are added
- Suitable for indoor domestic installations
