Why integrated PV systems will define the next phase of electrified installations
As heat pump adoption accelerates across the UK, installers are increasingly being asked a critical question:
How can solar meaningfully reduce the running costs of an all-electric home?
The answer lies not simply in adding panels to a roof, but in designing solar as part of a coordinated electrification strategy.
A recent Solarwatt Home installation in North-East Wales demonstrates how photovoltaic (PV), battery storage and an air-source heat pump can operate as one integrated system — maximising self-consumption, stabilising energy costs and improving long-term performance.
With more than 32 years of experience in solar engineering and system design, Solarwatt brings long-term performance thinking to the integration of PV, storage and smart energy management.
More importantly, it highlights how installer thinking must evolve as homes transition away from fossil fuels.
From components to energy architecture
The project combined SOLARWATT’s intelligently integrated hardware and software:
· 20 Solarwatt glass-glass PV modules (approx. 9kWp)
· A 6kW hybrid inverter
· 10.4kWh battery storage
· An air-source heat pump
· Solarwatt’s integrated energy management platform
Rather than installing solar and heating as separate measures, the system was designed from the outset to function as a coordinated energy ecosystem.
That distinction is critical
In many homes, solar generation peaks at midday while heating demand rises in the morning and evening. Without intelligent coordination, surplus electricity is exported at low rates, and homeowners import power at peak tariffs.
Solarwatt’s energy management software addresses this imbalance. Excess solar generation is stored in the battery and deployed strategically to support heat pump demand. The system continuously monitors production, storage and consumption, optimising energy flows in real time.
For installers, this represents a shift from component installation to system design.
Why electrification changes solar design
Heat pumps significantly increase household electricity demand — particularly in winter. Traditional PV sizing, based purely on historic household consumption, is often insufficient for electrified properties.
Designing solar for high-load homes means:
· Sizing arrays around future energy demand, not past usage
· Treating battery storage as a strategic enabler, not an optional extra
· Ensuring monitoring and control systems can coordinate thermal loads
· Specifying components engineered for long-term performance
In this installation, the 10.4kWh battery bridges the timing gap between generation and heating demand, improving self-consumption and reducing reliance on grid imports during high-cost periods.
Another consideration for electrified homes is how storage can adapt as demand evolves. The SOLARWATT Battery vision platform uses a modular architecture, allowing battery capacity to be expanded over time rather than fixed at the point of installation.
This flexibility is increasingly valuable as homeowners continue to electrify their properties. Heat pumps may be installed first, but EV charging, induction cooking and additional electrical loads often follow. A scalable storage platform allows installers to size systems appropriately at the outset while retaining the ability to increase capacity as the household’s energy profile grows.
For installers, modular storage reduces the risk of under sizing systems in rapidly electrifying homes, while avoiding unnecessary upfront costs. It also reinforces the shift toward viewing solar and storage not simply as equipment, but as adaptable infrastructure designed to support the long-term transition to all-electric living.
As export tariffs remain relatively modest compared to retail electricity prices, maximising on-site consumption has become the primary value driver.
Policy momentum: The Warm Homes Plan
This system-led thinking also aligns with the direction of UK policy. The proposed Warm Homes Plan aims to accelerate low-carbon heating adoption and whole-home upgrades.
For installers, this signals a move toward coordinated measures rather than isolated technologies. Heat pumps, insulation and energy generation are increasingly expected to work together to deliver measurable performance improvements.
As electrified heating expands, grid demand will rise. Solar systems that are designed to actively support that demand — rather than operate independently — strengthen the financial case for heat pump adoption and improve overall system outcomes.
Solarwatt’s integrated approach reflects this policy shift. By delivering PV modules, storage and intelligent energy management as a unified solution, installers can specify systems that directly support the goals of electrified housing.
Rather than solar being an afterthought, it becomes core infrastructure for the all-electric home.
Durability and performance matter more than ever
Electrified homes rely heavily on system stability. When solar output contributes directly to heating efficiency, degradation or failure carries greater financial consequences.
Solarwatt’s glass-glass modules are engineered for enhanced durability, protecting against microcracks, moisture ingress and long-term performance decline. Combined with integrated monitoring, this supports consistent yield over multi-decade lifespans.
For installers, reduced performance risk means fewer callbacks and stronger customer confidence — both increasingly valuable in a referral-driven market.
As systems become more complex, quality and compatibility are no longer secondary considerations.
Designing for the next phase of growth
Spring installations provide an ideal opportunity to rethink solar specification alongside heat pumps. With many projects being scoped ahead of the next heating cycle, installers have the chance to design more intelligently from the outset.
Key considerations include:
· Is the PV array sized for full electrification?
· Is storage capacity aligned with heating demand?
· Can the control system coordinate generation and load in real time?
· Are components specified for 25–30 years of stable performance?
The North-East Wales project illustrates how these questions can be addressed within a single, integrated framework.
Integration as a competitive advantage
As electrification accelerates, homeowners are investing in energy resilience — not just equipment.
Solar, storage and heat pumps can coexist. But when engineered to actively support one another, they deliver significantly greater value: lower imports, improved cost predictability and stronger carbon reductions.
Solarwatt’s system-led model enables installers to move beyond bolt-on thinking and deliver fully integrated solar + heat pump solutions designed for high-demand homes.
In the era of electrification, integration isn’t an upgrade — it’s the advantage.
To explore how Solarwatt Home systems can support your next heat pump installation, and to view detailed performance data from this project, visit the case study or speak with the solarwatt.co.uk UK team about installer partnership opportunities.
Visit us at booth D95 at Solar & Storage Live London
