Strom 7kW Single Phase Electric Combi Boiler - SBSP7C
The Strom SBSP7C 7kW Single Phase Electric Combi Boiler delivers central heating and instant domestic hot water from a single compact unit — with no flue, no carbon monoxide risk, and no gas supply needed. Designed from the ground up to replicate the familiar experience of gas, oil or LPG boilers, it is the ideal solution for off-grid properties, gas-free homes, and spaces where a conventional boiler cannot be fitted. Running on a standard 230V single-phase supply and drawing just 32A, the SBSP7C is small enough to fit almost anywhere yet powerful enough to serve a compact home with radiators, underfloor heating and a shower.
Electric combi boilers are the clean alternative to gas for homes off the mains gas network — and increasingly popular in new builds, flats, and rural properties. Unlike oil or LPG, there are no delivery logistics, no external storage tanks, and no requirement for an annual Gas Safe service. The SBSP7C combines heating and on-demand hot water in one wall-hung cabinet, eliminating the need for a separate hot water cylinder in smaller applications.
With over 99% thermal efficiency, virtually every unit of electricity drawn from the supply becomes useful heat. Paired with a solar PV system or an Economy 10 tariff, running costs can be kept highly competitive against fossil-fuel alternatives.
Strom's proprietary serpentine heating element transfers heat across the full surface area rather than a single hot spot. Multiple independent strands share the load, minimising limescale formation and extending element life significantly compared with conventional immersion-style elements.
Output modulates down to as little as 1kW, matching heat production precisely to demand. This avoids energy waste during mild weather and reduces electricity bills compared with fixed-output boilers.
Both the circulation pump and expansion vessel are built in, reducing the number of external components required during installation. The boiler arrives ready to connect, saving time and materials on site.
An intuitive LED digital touchscreen provides clear status information and easy temperature adjustment. The display shows the current time, allowing homeowners to confirm the programmer is running correctly at a glance.
Because electric boilers produce no combustion gases, no flue or air supply is needed. The SBSP7C can be installed in a kitchen, airing cupboard, utility room or bedroom — anywhere a standard 230V supply is available.
With no combustion process whatsoever, CO is simply impossible. A significant safety advantage for flats, HMOs, and any property where CO alarm regulations and inspections are a concern.
Minimal moving parts mean minimal noise. Unlike gas boilers that ignite and modulate a burner, the SBSP7C operates almost silently — ideal for bedrooms, home offices or noise-sensitive installations.
At just 700 × 425 × 250mm, the SBSP7C is smaller than most standard gas boilers. Its slim footprint makes it suitable for tight spaces where a combi replacement was previously impossible.
Compatible with solar PV systems, the SBSP7C can use excess generation to heat your home. On Economy 10 tariffs it competes favourably against oil and LPG on running cost when managed across off-peak periods.
Built-in frost protection monitors internal temperature and triggers an automatic defrost cycle when the boiler drops dangerously low — protecting pipework in unheated areas or holiday properties.
Unlike gas appliances, electric boilers have no combustion components to check, clean or certify annually. Maintenance is limited to system pressure and inhibitor levels — dramatically reducing ongoing ownership costs.
With a flow temperature range of 20°C–80°C and modulation down to 1kW, the SBSP7C works equally well with low-temperature underfloor heating circuits and conventional radiator systems.
This boiler must be installed by a competent, certified plumber or heating engineer in accordance with the Building Regulations in force at the time of installation. Electrical connection must comply with BS 7671 and be carried out by a qualified electrician. Minimum breaker size: 40A. Minimum cable size: 4mm². Strom Limited are not responsible for faulty installations performed by unqualified tradespeople.
The 7kW single-phase unit delivers a DHW flow rate of 4 litres per minute at a 30°C rise — well suited to showers and basins. Strom recommend selecting a 3-phase model for applications that include a bath, as the higher outputs of 18–24kW units are better matched to bath-filling demands.
Electrical: Dedicated 40A MCB on a 4mm² cable from your consumer unit. Must be wired by a Part P qualified electrician. Confirm your existing consumer unit has capacity before ordering.
Plumbing: The system must be flushed to 10% of mains PPM (chloride and otherwise) prior to first fill. If retrofitting into an existing system, a power flush must be completed to remove debris from radiators and pipework. Use flexi hoses on all connections.
System pressure: Fill the heating circuit when cold to 1.0–1.5 Bar. The filling loop must comply with current Water Regulations and must be removed and capped after filling.
Inhibitor: Add a suitable central heating inhibitor (e.g. Fernox F1 or equivalent) to protect the heat exchanger and system components. System water quality directly affects boiler longevity and warranty validity.
Can the SBSP7C replace my existing gas combi boiler?
The SBSP7C has been designed to replicate the combi boiler experience familiar from gas, oil or LPG systems. You will need a competent engineer to reconfigure the pipework and remove the gas components. At 7kW single phase the DHW flow rate of 4 L/min suits showers and basins well; for bath-filling applications a 3-phase model is recommended.
Do I need a hot water cylinder with a combi boiler?
No — hot water is heated on demand directly from the mains cold supply; there is no storage tank or cylinder required for DHW. The SBSP7C can, however, also work in conjunction with a vented or unvented indirect cylinder for system configurations that require stored hot water.
How do I register for the 5-year warranty?
Register at stromltd.com/guarantee within 45 days of purchase using the registration card supplied in the box and the details from your original merchant invoice. Only the legal owner of the building can register. If not registered within 45 days the warranty defaults to 12 months.
Is the boiler compatible with solar panels?
Yes. The SBSP7C is compatible with solar PV systems and can use excess generation to run the boiler, significantly reducing running costs during sunny periods. For optimum solar integration consider adding a power diverter such as a myenergi eddi to automatically redirect surplus export.
Does the boiler need a service every year?
No annual service is required. Because there are no combustion components, there is nothing equivalent to a gas boiler's annual safety inspection. Routine maintenance is limited to checking system pressure and ensuring the water inhibitor concentration remains adequate.
Can I control the boiler with a room thermostat or smart thermostat?
Yes. The SBSP7C accepts a standard room thermostat connection and is compatible with a wide range of programmable and smart thermostats. Strom also offer a Controls Pack A bundle which includes a programmable RF room stat for wireless control.
What is the default hot water temperature?
The DHW temperature is set to 45°C by default. The user can adjust this using the increase/decrease buttons on the touchscreen, but only while a hot water outlet is actively open — a safety feature to prevent scalding from excessive stored heat.
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Strom 7kW Single Phase Electric Combi Boiler - SBSP7C
The Strom SBSP7C 7kW Single Phase Electric Combi Boiler delivers central heating and instant domestic hot water from a single compact unit — with no flue, no carbon monoxide risk, and no gas supply needed. Designed from the ground up to replicate the familiar experience of gas, oil or LPG boilers, it is the ideal solution for off-grid properties, gas-free homes, and spaces where a conventional boiler cannot be fitted. Running on a standard 230V single-phase supply and drawing just 32A, the SBSP7C is small enough to fit almost anywhere yet powerful enough to serve a compact home with radiators, underfloor heating and a shower.
Electric combi boilers are the clean alternative to gas for homes off the mains gas network — and increasingly popular in new builds, flats, and rural properties. Unlike oil or LPG, there are no delivery logistics, no external storage tanks, and no requirement for an annual Gas Safe service. The SBSP7C combines heating and on-demand hot water in one wall-hung cabinet, eliminating the need for a separate hot water cylinder in smaller applications.
With over 99% thermal efficiency, virtually every unit of electricity drawn from the supply becomes useful heat. Paired with a solar PV system or an Economy 10 tariff, running costs can be kept highly competitive against fossil-fuel alternatives.
Strom's proprietary serpentine heating element transfers heat across the full surface area rather than a single hot spot. Multiple independent strands share the load, minimising limescale formation and extending element life significantly compared with conventional immersion-style elements.
Output modulates down to as little as 1kW, matching heat production precisely to demand. This avoids energy waste during mild weather and reduces electricity bills compared with fixed-output boilers.
Both the circulation pump and expansion vessel are built in, reducing the number of external components required during installation. The boiler arrives ready to connect, saving time and materials on site.
An intuitive LED digital touchscreen provides clear status information and easy temperature adjustment. The display shows the current time, allowing homeowners to confirm the programmer is running correctly at a glance.
Because electric boilers produce no combustion gases, no flue or air supply is needed. The SBSP7C can be installed in a kitchen, airing cupboard, utility room or bedroom — anywhere a standard 230V supply is available.
With no combustion process whatsoever, CO is simply impossible. A significant safety advantage for flats, HMOs, and any property where CO alarm regulations and inspections are a concern.
Minimal moving parts mean minimal noise. Unlike gas boilers that ignite and modulate a burner, the SBSP7C operates almost silently — ideal for bedrooms, home offices or noise-sensitive installations.
At just 700 × 425 × 250mm, the SBSP7C is smaller than most standard gas boilers. Its slim footprint makes it suitable for tight spaces where a combi replacement was previously impossible.
Compatible with solar PV systems, the SBSP7C can use excess generation to heat your home. On Economy 10 tariffs it competes favourably against oil and LPG on running cost when managed across off-peak periods.
Built-in frost protection monitors internal temperature and triggers an automatic defrost cycle when the boiler drops dangerously low — protecting pipework in unheated areas or holiday properties.
Unlike gas appliances, electric boilers have no combustion components to check, clean or certify annually. Maintenance is limited to system pressure and inhibitor levels — dramatically reducing ongoing ownership costs.
With a flow temperature range of 20°C–80°C and modulation down to 1kW, the SBSP7C works equally well with low-temperature underfloor heating circuits and conventional radiator systems.
This boiler must be installed by a competent, certified plumber or heating engineer in accordance with the Building Regulations in force at the time of installation. Electrical connection must comply with BS 7671 and be carried out by a qualified electrician. Minimum breaker size: 40A. Minimum cable size: 4mm². Strom Limited are not responsible for faulty installations performed by unqualified tradespeople.
The 7kW single-phase unit delivers a DHW flow rate of 4 litres per minute at a 30°C rise — well suited to showers and basins. Strom recommend selecting a 3-phase model for applications that include a bath, as the higher outputs of 18–24kW units are better matched to bath-filling demands.
Electrical: Dedicated 40A MCB on a 4mm² cable from your consumer unit. Must be wired by a Part P qualified electrician. Confirm your existing consumer unit has capacity before ordering.
Plumbing: The system must be flushed to 10% of mains PPM (chloride and otherwise) prior to first fill. If retrofitting into an existing system, a power flush must be completed to remove debris from radiators and pipework. Use flexi hoses on all connections.
System pressure: Fill the heating circuit when cold to 1.0–1.5 Bar. The filling loop must comply with current Water Regulations and must be removed and capped after filling.
Inhibitor: Add a suitable central heating inhibitor (e.g. Fernox F1 or equivalent) to protect the heat exchanger and system components. System water quality directly affects boiler longevity and warranty validity.
Can the SBSP7C replace my existing gas combi boiler?
The SBSP7C has been designed to replicate the combi boiler experience familiar from gas, oil or LPG systems. You will need a competent engineer to reconfigure the pipework and remove the gas components. At 7kW single phase the DHW flow rate of 4 L/min suits showers and basins well; for bath-filling applications a 3-phase model is recommended.
Do I need a hot water cylinder with a combi boiler?
No — hot water is heated on demand directly from the mains cold supply; there is no storage tank or cylinder required for DHW. The SBSP7C can, however, also work in conjunction with a vented or unvented indirect cylinder for system configurations that require stored hot water.
How do I register for the 5-year warranty?
Register at stromltd.com/guarantee within 45 days of purchase using the registration card supplied in the box and the details from your original merchant invoice. Only the legal owner of the building can register. If not registered within 45 days the warranty defaults to 12 months.
Is the boiler compatible with solar panels?
Yes. The SBSP7C is compatible with solar PV systems and can use excess generation to run the boiler, significantly reducing running costs during sunny periods. For optimum solar integration consider adding a power diverter such as a myenergi eddi to automatically redirect surplus export.
Does the boiler need a service every year?
No annual service is required. Because there are no combustion components, there is nothing equivalent to a gas boiler's annual safety inspection. Routine maintenance is limited to checking system pressure and ensuring the water inhibitor concentration remains adequate.
Can I control the boiler with a room thermostat or smart thermostat?
Yes. The SBSP7C accepts a standard room thermostat connection and is compatible with a wide range of programmable and smart thermostats. Strom also offer a Controls Pack A bundle which includes a programmable RF room stat for wireless control.
What is the default hot water temperature?
The DHW temperature is set to 45°C by default. The user can adjust this using the increase/decrease buttons on the touchscreen, but only while a hot water outlet is actively open — a safety feature to prevent scalding from excessive stored heat.
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Description
The Strom SBSP7C 7kW Single Phase Electric Combi Boiler delivers central heating and instant domestic hot water from a single compact unit — with no flue, no carbon monoxide risk, and no gas supply needed. Designed from the ground up to replicate the familiar experience of gas, oil or LPG boilers, it is the ideal solution for off-grid properties, gas-free homes, and spaces where a conventional boiler cannot be fitted. Running on a standard 230V single-phase supply and drawing just 32A, the SBSP7C is small enough to fit almost anywhere yet powerful enough to serve a compact home with radiators, underfloor heating and a shower.
Electric combi boilers are the clean alternative to gas for homes off the mains gas network — and increasingly popular in new builds, flats, and rural properties. Unlike oil or LPG, there are no delivery logistics, no external storage tanks, and no requirement for an annual Gas Safe service. The SBSP7C combines heating and on-demand hot water in one wall-hung cabinet, eliminating the need for a separate hot water cylinder in smaller applications.
With over 99% thermal efficiency, virtually every unit of electricity drawn from the supply becomes useful heat. Paired with a solar PV system or an Economy 10 tariff, running costs can be kept highly competitive against fossil-fuel alternatives.
Strom's proprietary serpentine heating element transfers heat across the full surface area rather than a single hot spot. Multiple independent strands share the load, minimising limescale formation and extending element life significantly compared with conventional immersion-style elements.
Output modulates down to as little as 1kW, matching heat production precisely to demand. This avoids energy waste during mild weather and reduces electricity bills compared with fixed-output boilers.
Both the circulation pump and expansion vessel are built in, reducing the number of external components required during installation. The boiler arrives ready to connect, saving time and materials on site.
An intuitive LED digital touchscreen provides clear status information and easy temperature adjustment. The display shows the current time, allowing homeowners to confirm the programmer is running correctly at a glance.
Because electric boilers produce no combustion gases, no flue or air supply is needed. The SBSP7C can be installed in a kitchen, airing cupboard, utility room or bedroom — anywhere a standard 230V supply is available.
With no combustion process whatsoever, CO is simply impossible. A significant safety advantage for flats, HMOs, and any property where CO alarm regulations and inspections are a concern.
Minimal moving parts mean minimal noise. Unlike gas boilers that ignite and modulate a burner, the SBSP7C operates almost silently — ideal for bedrooms, home offices or noise-sensitive installations.
At just 700 × 425 × 250mm, the SBSP7C is smaller than most standard gas boilers. Its slim footprint makes it suitable for tight spaces where a combi replacement was previously impossible.
Compatible with solar PV systems, the SBSP7C can use excess generation to heat your home. On Economy 10 tariffs it competes favourably against oil and LPG on running cost when managed across off-peak periods.
Built-in frost protection monitors internal temperature and triggers an automatic defrost cycle when the boiler drops dangerously low — protecting pipework in unheated areas or holiday properties.
Unlike gas appliances, electric boilers have no combustion components to check, clean or certify annually. Maintenance is limited to system pressure and inhibitor levels — dramatically reducing ongoing ownership costs.
With a flow temperature range of 20°C–80°C and modulation down to 1kW, the SBSP7C works equally well with low-temperature underfloor heating circuits and conventional radiator systems.
This boiler must be installed by a competent, certified plumber or heating engineer in accordance with the Building Regulations in force at the time of installation. Electrical connection must comply with BS 7671 and be carried out by a qualified electrician. Minimum breaker size: 40A. Minimum cable size: 4mm². Strom Limited are not responsible for faulty installations performed by unqualified tradespeople.
The 7kW single-phase unit delivers a DHW flow rate of 4 litres per minute at a 30°C rise — well suited to showers and basins. Strom recommend selecting a 3-phase model for applications that include a bath, as the higher outputs of 18–24kW units are better matched to bath-filling demands.
Electrical: Dedicated 40A MCB on a 4mm² cable from your consumer unit. Must be wired by a Part P qualified electrician. Confirm your existing consumer unit has capacity before ordering.
Plumbing: The system must be flushed to 10% of mains PPM (chloride and otherwise) prior to first fill. If retrofitting into an existing system, a power flush must be completed to remove debris from radiators and pipework. Use flexi hoses on all connections.
System pressure: Fill the heating circuit when cold to 1.0–1.5 Bar. The filling loop must comply with current Water Regulations and must be removed and capped after filling.
Inhibitor: Add a suitable central heating inhibitor (e.g. Fernox F1 or equivalent) to protect the heat exchanger and system components. System water quality directly affects boiler longevity and warranty validity.
Can the SBSP7C replace my existing gas combi boiler?
The SBSP7C has been designed to replicate the combi boiler experience familiar from gas, oil or LPG systems. You will need a competent engineer to reconfigure the pipework and remove the gas components. At 7kW single phase the DHW flow rate of 4 L/min suits showers and basins well; for bath-filling applications a 3-phase model is recommended.
Do I need a hot water cylinder with a combi boiler?
No — hot water is heated on demand directly from the mains cold supply; there is no storage tank or cylinder required for DHW. The SBSP7C can, however, also work in conjunction with a vented or unvented indirect cylinder for system configurations that require stored hot water.
How do I register for the 5-year warranty?
Register at stromltd.com/guarantee within 45 days of purchase using the registration card supplied in the box and the details from your original merchant invoice. Only the legal owner of the building can register. If not registered within 45 days the warranty defaults to 12 months.
Is the boiler compatible with solar panels?
Yes. The SBSP7C is compatible with solar PV systems and can use excess generation to run the boiler, significantly reducing running costs during sunny periods. For optimum solar integration consider adding a power diverter such as a myenergi eddi to automatically redirect surplus export.
Does the boiler need a service every year?
No annual service is required. Because there are no combustion components, there is nothing equivalent to a gas boiler's annual safety inspection. Routine maintenance is limited to checking system pressure and ensuring the water inhibitor concentration remains adequate.
Can I control the boiler with a room thermostat or smart thermostat?
Yes. The SBSP7C accepts a standard room thermostat connection and is compatible with a wide range of programmable and smart thermostats. Strom also offer a Controls Pack A bundle which includes a programmable RF room stat for wireless control.
What is the default hot water temperature?
The DHW temperature is set to 45°C by default. The user can adjust this using the increase/decrease buttons on the touchscreen, but only while a hot water outlet is actively open — a safety feature to prevent scalding from excessive stored heat.
