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EHC Comet PV 8kW Electric System Boiler Model 1 — EHCEPV8KW — Multi-Output 2 4 6 8kW Solar PV Single Phase
EHC Comet PV 8kW Electric System Boiler Model 1 — EHCEPV8KW — Multi-Output 2 4 6 8kW Solar PV Single Phase
The EHC Comet PV 8kW Electric System Boiler (Model 1 — EHCEPV8KW) is a single-phase 230V smart electric system boiler with four selectable output levels — 2, 4, 6 or 8kW — configured on-site at installation. It functions as a standard electric system boiler for central heating (a hot water cylinder is required for DHW), and can additionally be integrated directly with a solar PV installation to maximise self-consumption of generated electricity. The boiler incorporates a six-stage modulating stainless steel heat exchanger, pump, expansion vessel, auto-bypass, and auto-air vent — all within the compact 710mm casing — eliminating the need for separate sealed system components. Weather compensation, energy monitoring, three-zone control capability, and app connectivity (via optional C.MI2 module) are all included. Suitable for small to medium properties, new builds, and off-gas-grid homes with solar PV. 5-year warranty as standard; 10-year warranty now available for this model.
⚡ System Boiler — Cylinder Required — The Comet PV is a system boiler: it heats the central heating circuit and an indirect hot water cylinder for DHW. A separate hot water cylinder is required. DHW can be provided via S-Plan or Y-Plan with the EHC Twin Channel Heatpack. If no cylinder space is available, consider the EHC Astro V2 combi boiler instead.
⚠ Qualified Installation Required — Must be installed by a Part P registered electrician in accordance with EHC installation instructions and all applicable Building Regulations. Filling loop not supplied.
2–8 kW
On-site selectable
Single phase
230V / 50Hz
Solar PV
Direct integration
3 zones
Independent circuits
10 years
Warranty available
Features & Benefits
✔ Solar PV Integration — Maximise Self-Consumption
The Comet PV can be integrated directly with a solar PV installation to divert surplus generated electricity into heating rather than exporting it to the grid at the lower SEG rate. When PV output exceeds immediate household consumption, the boiler absorbs the surplus — heating the cylinder or running the heating circuit — converting electricity that would earn only the export tariff into heat at the grid import rate value. Particularly valuable for homes already running PV who want to maximise self-use without a diverter device.
✔ On-Site Multi-Output — Configurable at Installation
Rather than a fixed output, the Comet PV is configured on-site to the required kW level — matched to the property's heat loss calculation. The setting can be adjusted after initial commissioning, so if insulation improves or the system design changes, the boiler's output can be recalibrated without replacement. This gives the installer flexibility and means a single boiler model covers a range of property sizes.
✔ Up to Three Independent Heating Zones
The Comet PV manages up to three separate heating circuits simultaneously at different flow temperatures — for example, underfloor heating at 40°C, panel radiators at 65°C, and a towel rail circuit — without requiring individual zone mixing valves. This simplifies mixed-emitter system design considerably, making the boiler suitable for new builds and retrofits with diverse heating layouts.
✔ App Control — EHC C.MI2 Internet Module
With the optional EHC C.MI2 Internet Module (AHP1004), the boiler connects to the EHC smartphone app for full remote control — heating schedules, temperature settings, energy consumption monitoring, and system status. App connectivity is particularly useful for monitoring solar PV contribution and optimising heating schedules around generation periods. The internet module is sold separately.
✔ Weather Compensation & Energy Monitoring
Weather compensation automatically adjusts the boiler's flow temperature based on outdoor conditions — raising output in cold weather, reducing it on mild days — preventing overcycling and improving system efficiency, especially with UFH. Energy monitoring tracks consumption over time, enabling the homeowner and installer to understand running costs and optimise schedules around cheap-rate tariffs (Economy 7, Octopus Go) or PV generation windows.
✔ Six-Stage Stainless Steel Heat Exchanger
The Comet PV's six-stage modulating stainless steel heat exchanger steps the boiler's output through six power levels rather than cycling on/off at full power. This reduces current peaks, smooths demand on the supply, and maintains steadier system temperatures — particularly beneficial on time-of-use tariffs where high instantaneous demand can trigger peak charges. The stainless heat exchanger resists corrosion and is designed to eliminate unnecessary external pipework connections.
✔ All-in-One Sealed System — No External Pipework
The boiler incorporates pump, auto-air vent, expansion vessel, auto-bypass valve, and pressure gauge within the compact casing — there is no requirement for separate external sealed system components. This simplifies the installation significantly, particularly in retrofit scenarios where adding an external expansion vessel, pump station, and auto-air vent to existing pipework would be time-consuming and require additional space.
✔ Anti-Legionella, Frost Protection & Fault Diagnostics
Automatic anti-legionella cycling periodically raises DHW cylinder temperature above 60°C to comply with hygiene requirements. Frost protection activates the boiler at a preset temperature threshold to protect pipework in unoccupied properties. Built-in fault diagnostics display error codes on the backlit LCD panel, reducing diagnostic call-out time. A high-current thermal cut-out provides additional safety protection.
Output Configurations — Model 1 (Single Phase)
| Output | BTU | Approx. Load Current |
|---|---|---|
| 2 kW | 6,824 BTU | ~9 A |
| 4 kW | 13,648 BTU | ~17 A |
| 6 kW | 20,472 BTU | ~26 A |
| 8 kW | 27,297 BTU | ~35 A |
Technical Specifications — 8kW Model 1
| Manufacturer / SKU | EHC (The Electric Heating Company) — EHCEPV8KW |
| Boiler Type | Electric system boiler (cylinder required for DHW) |
| Supply | Single phase 230V / 50Hz |
| Output Settings | 2, 4, 6, 8 kW — on-site configurable |
| Heat Exchanger | 6-stage modulating stainless steel |
| Flow Temperature Range | 20°C – 85°C (adjustable) |
| Heating Zones | Up to 3 independent circuits at different temperatures |
| Integral Components | Pump, expansion vessel, auto-air vent, auto-bypass, pressure gauge |
| Dimensions (H × W × D) | 710 × 418 × 251 mm |
| Weight | 25 kg |
| Solar PV Integration | Yes — built in |
| App Control | Via EHC C.MI2 Internet Module AHP1004 (sold separately) |
| Supplied With | Wired room temperature sensor, outdoor weather compensation sensor, DHW tank temperature sensor, hanging bracket (filling loop not supplied) |
| ERP Rating | D (heating) |
| Warranty | 5 years standard (registration required) · 10-year Plus warranty now available for this model |
$2,004.26
EHC Comet PV 8kW Electric System Boiler Model 1 — EHCEPV8KW — Multi-Output 2 4 6 8kW Solar PV Single Phase—
$2,004.26
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EHC Comet PV 8kW Electric System Boiler Model 1 — EHCEPV8KW — Multi-Output 2 4 6 8kW Solar PV Single Phase
The EHC Comet PV 8kW Electric System Boiler (Model 1 — EHCEPV8KW) is a single-phase 230V smart electric system boiler with four selectable output levels — 2, 4, 6 or 8kW — configured on-site at installation. It functions as a standard electric system boiler for central heating (a hot water cylinder is required for DHW), and can additionally be integrated directly with a solar PV installation to maximise self-consumption of generated electricity. The boiler incorporates a six-stage modulating stainless steel heat exchanger, pump, expansion vessel, auto-bypass, and auto-air vent — all within the compact 710mm casing — eliminating the need for separate sealed system components. Weather compensation, energy monitoring, three-zone control capability, and app connectivity (via optional C.MI2 module) are all included. Suitable for small to medium properties, new builds, and off-gas-grid homes with solar PV. 5-year warranty as standard; 10-year warranty now available for this model.
⚡ System Boiler — Cylinder Required — The Comet PV is a system boiler: it heats the central heating circuit and an indirect hot water cylinder for DHW. A separate hot water cylinder is required. DHW can be provided via S-Plan or Y-Plan with the EHC Twin Channel Heatpack. If no cylinder space is available, consider the EHC Astro V2 combi boiler instead.
⚠ Qualified Installation Required — Must be installed by a Part P registered electrician in accordance with EHC installation instructions and all applicable Building Regulations. Filling loop not supplied.
2–8 kW
On-site selectable
Single phase
230V / 50Hz
Solar PV
Direct integration
3 zones
Independent circuits
10 years
Warranty available
Features & Benefits
✔ Solar PV Integration — Maximise Self-Consumption
The Comet PV can be integrated directly with a solar PV installation to divert surplus generated electricity into heating rather than exporting it to the grid at the lower SEG rate. When PV output exceeds immediate household consumption, the boiler absorbs the surplus — heating the cylinder or running the heating circuit — converting electricity that would earn only the export tariff into heat at the grid import rate value. Particularly valuable for homes already running PV who want to maximise self-use without a diverter device.
✔ On-Site Multi-Output — Configurable at Installation
Rather than a fixed output, the Comet PV is configured on-site to the required kW level — matched to the property's heat loss calculation. The setting can be adjusted after initial commissioning, so if insulation improves or the system design changes, the boiler's output can be recalibrated without replacement. This gives the installer flexibility and means a single boiler model covers a range of property sizes.
✔ Up to Three Independent Heating Zones
The Comet PV manages up to three separate heating circuits simultaneously at different flow temperatures — for example, underfloor heating at 40°C, panel radiators at 65°C, and a towel rail circuit — without requiring individual zone mixing valves. This simplifies mixed-emitter system design considerably, making the boiler suitable for new builds and retrofits with diverse heating layouts.
✔ App Control — EHC C.MI2 Internet Module
With the optional EHC C.MI2 Internet Module (AHP1004), the boiler connects to the EHC smartphone app for full remote control — heating schedules, temperature settings, energy consumption monitoring, and system status. App connectivity is particularly useful for monitoring solar PV contribution and optimising heating schedules around generation periods. The internet module is sold separately.
✔ Weather Compensation & Energy Monitoring
Weather compensation automatically adjusts the boiler's flow temperature based on outdoor conditions — raising output in cold weather, reducing it on mild days — preventing overcycling and improving system efficiency, especially with UFH. Energy monitoring tracks consumption over time, enabling the homeowner and installer to understand running costs and optimise schedules around cheap-rate tariffs (Economy 7, Octopus Go) or PV generation windows.
✔ Six-Stage Stainless Steel Heat Exchanger
The Comet PV's six-stage modulating stainless steel heat exchanger steps the boiler's output through six power levels rather than cycling on/off at full power. This reduces current peaks, smooths demand on the supply, and maintains steadier system temperatures — particularly beneficial on time-of-use tariffs where high instantaneous demand can trigger peak charges. The stainless heat exchanger resists corrosion and is designed to eliminate unnecessary external pipework connections.
✔ All-in-One Sealed System — No External Pipework
The boiler incorporates pump, auto-air vent, expansion vessel, auto-bypass valve, and pressure gauge within the compact casing — there is no requirement for separate external sealed system components. This simplifies the installation significantly, particularly in retrofit scenarios where adding an external expansion vessel, pump station, and auto-air vent to existing pipework would be time-consuming and require additional space.
✔ Anti-Legionella, Frost Protection & Fault Diagnostics
Automatic anti-legionella cycling periodically raises DHW cylinder temperature above 60°C to comply with hygiene requirements. Frost protection activates the boiler at a preset temperature threshold to protect pipework in unoccupied properties. Built-in fault diagnostics display error codes on the backlit LCD panel, reducing diagnostic call-out time. A high-current thermal cut-out provides additional safety protection.
Output Configurations — Model 1 (Single Phase)
| Output | BTU | Approx. Load Current |
|---|---|---|
| 2 kW | 6,824 BTU | ~9 A |
| 4 kW | 13,648 BTU | ~17 A |
| 6 kW | 20,472 BTU | ~26 A |
| 8 kW | 27,297 BTU | ~35 A |
Technical Specifications — 8kW Model 1
| Manufacturer / SKU | EHC (The Electric Heating Company) — EHCEPV8KW |
| Boiler Type | Electric system boiler (cylinder required for DHW) |
| Supply | Single phase 230V / 50Hz |
| Output Settings | 2, 4, 6, 8 kW — on-site configurable |
| Heat Exchanger | 6-stage modulating stainless steel |
| Flow Temperature Range | 20°C – 85°C (adjustable) |
| Heating Zones | Up to 3 independent circuits at different temperatures |
| Integral Components | Pump, expansion vessel, auto-air vent, auto-bypass, pressure gauge |
| Dimensions (H × W × D) | 710 × 418 × 251 mm |
| Weight | 25 kg |
| Solar PV Integration | Yes — built in |
| App Control | Via EHC C.MI2 Internet Module AHP1004 (sold separately) |
| Supplied With | Wired room temperature sensor, outdoor weather compensation sensor, DHW tank temperature sensor, hanging bracket (filling loop not supplied) |
| ERP Rating | D (heating) |
| Warranty | 5 years standard (registration required) · 10-year Plus warranty now available for this model |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The EHC Comet PV 8kW Electric System Boiler (Model 1 — EHCEPV8KW) is a single-phase 230V smart electric system boiler with four selectable output levels — 2, 4, 6 or 8kW — configured on-site at installation. It functions as a standard electric system boiler for central heating (a hot water cylinder is required for DHW), and can additionally be integrated directly with a solar PV installation to maximise self-consumption of generated electricity. The boiler incorporates a six-stage modulating stainless steel heat exchanger, pump, expansion vessel, auto-bypass, and auto-air vent — all within the compact 710mm casing — eliminating the need for separate sealed system components. Weather compensation, energy monitoring, three-zone control capability, and app connectivity (via optional C.MI2 module) are all included. Suitable for small to medium properties, new builds, and off-gas-grid homes with solar PV. 5-year warranty as standard; 10-year warranty now available for this model.
⚡ System Boiler — Cylinder Required — The Comet PV is a system boiler: it heats the central heating circuit and an indirect hot water cylinder for DHW. A separate hot water cylinder is required. DHW can be provided via S-Plan or Y-Plan with the EHC Twin Channel Heatpack. If no cylinder space is available, consider the EHC Astro V2 combi boiler instead.
⚠ Qualified Installation Required — Must be installed by a Part P registered electrician in accordance with EHC installation instructions and all applicable Building Regulations. Filling loop not supplied.
2–8 kW
On-site selectable
Single phase
230V / 50Hz
Solar PV
Direct integration
3 zones
Independent circuits
10 years
Warranty available
Features & Benefits
✔ Solar PV Integration — Maximise Self-Consumption
The Comet PV can be integrated directly with a solar PV installation to divert surplus generated electricity into heating rather than exporting it to the grid at the lower SEG rate. When PV output exceeds immediate household consumption, the boiler absorbs the surplus — heating the cylinder or running the heating circuit — converting electricity that would earn only the export tariff into heat at the grid import rate value. Particularly valuable for homes already running PV who want to maximise self-use without a diverter device.
✔ On-Site Multi-Output — Configurable at Installation
Rather than a fixed output, the Comet PV is configured on-site to the required kW level — matched to the property's heat loss calculation. The setting can be adjusted after initial commissioning, so if insulation improves or the system design changes, the boiler's output can be recalibrated without replacement. This gives the installer flexibility and means a single boiler model covers a range of property sizes.
✔ Up to Three Independent Heating Zones
The Comet PV manages up to three separate heating circuits simultaneously at different flow temperatures — for example, underfloor heating at 40°C, panel radiators at 65°C, and a towel rail circuit — without requiring individual zone mixing valves. This simplifies mixed-emitter system design considerably, making the boiler suitable for new builds and retrofits with diverse heating layouts.
✔ App Control — EHC C.MI2 Internet Module
With the optional EHC C.MI2 Internet Module (AHP1004), the boiler connects to the EHC smartphone app for full remote control — heating schedules, temperature settings, energy consumption monitoring, and system status. App connectivity is particularly useful for monitoring solar PV contribution and optimising heating schedules around generation periods. The internet module is sold separately.
✔ Weather Compensation & Energy Monitoring
Weather compensation automatically adjusts the boiler's flow temperature based on outdoor conditions — raising output in cold weather, reducing it on mild days — preventing overcycling and improving system efficiency, especially with UFH. Energy monitoring tracks consumption over time, enabling the homeowner and installer to understand running costs and optimise schedules around cheap-rate tariffs (Economy 7, Octopus Go) or PV generation windows.
✔ Six-Stage Stainless Steel Heat Exchanger
The Comet PV's six-stage modulating stainless steel heat exchanger steps the boiler's output through six power levels rather than cycling on/off at full power. This reduces current peaks, smooths demand on the supply, and maintains steadier system temperatures — particularly beneficial on time-of-use tariffs where high instantaneous demand can trigger peak charges. The stainless heat exchanger resists corrosion and is designed to eliminate unnecessary external pipework connections.
✔ All-in-One Sealed System — No External Pipework
The boiler incorporates pump, auto-air vent, expansion vessel, auto-bypass valve, and pressure gauge within the compact casing — there is no requirement for separate external sealed system components. This simplifies the installation significantly, particularly in retrofit scenarios where adding an external expansion vessel, pump station, and auto-air vent to existing pipework would be time-consuming and require additional space.
✔ Anti-Legionella, Frost Protection & Fault Diagnostics
Automatic anti-legionella cycling periodically raises DHW cylinder temperature above 60°C to comply with hygiene requirements. Frost protection activates the boiler at a preset temperature threshold to protect pipework in unoccupied properties. Built-in fault diagnostics display error codes on the backlit LCD panel, reducing diagnostic call-out time. A high-current thermal cut-out provides additional safety protection.
Output Configurations — Model 1 (Single Phase)
| Output | BTU | Approx. Load Current |
|---|---|---|
| 2 kW | 6,824 BTU | ~9 A |
| 4 kW | 13,648 BTU | ~17 A |
| 6 kW | 20,472 BTU | ~26 A |
| 8 kW | 27,297 BTU | ~35 A |
Technical Specifications — 8kW Model 1
| Manufacturer / SKU | EHC (The Electric Heating Company) — EHCEPV8KW |
| Boiler Type | Electric system boiler (cylinder required for DHW) |
| Supply | Single phase 230V / 50Hz |
| Output Settings | 2, 4, 6, 8 kW — on-site configurable |
| Heat Exchanger | 6-stage modulating stainless steel |
| Flow Temperature Range | 20°C – 85°C (adjustable) |
| Heating Zones | Up to 3 independent circuits at different temperatures |
| Integral Components | Pump, expansion vessel, auto-air vent, auto-bypass, pressure gauge |
| Dimensions (H × W × D) | 710 × 418 × 251 mm |
| Weight | 25 kg |
| Solar PV Integration | Yes — built in |
| App Control | Via EHC C.MI2 Internet Module AHP1004 (sold separately) |
| Supplied With | Wired room temperature sensor, outdoor weather compensation sensor, DHW tank temperature sensor, hanging bracket (filling loop not supplied) |
| ERP Rating | D (heating) |
| Warranty | 5 years standard (registration required) · 10-year Plus warranty now available for this model |
