Sigenergy SigenFlux Heat Pump Launches in the UK

Sigenergy, the maker of the SigenStor home battery, has launched its SigenFlux heat pump in the UK at Solar & Storage Live UK 2026. It is an air-to-water heat pump designed to plug into the company's battery system and run from surplus solar, and a sample was first shown at Intersolar Europe earlier this year (Taiyang News, 7 October 2026). The launch is a product announcement rather than a buying guide: no UK price, capacity or efficiency figures have been published yet.

What Sigenergy has announced

An air-to-water unit. SigenFlux extracts heat from outside air and transfers it to water for residential use. A Polish trade report says it covers space heating as well as domestic hot water, but Sigenergy has not published heat output in kW, a coefficient of performance (COP) or a refrigerant type (Taiyang News).

Built to pair with the battery. The heat pump connects to Sigenergy's SigenStor Neo home battery through a built-in "smart port". The battery system first supplies priority household loads and storage, and the heat pump then uses excess solar to raise self-consumption (Taiyang News). The June 2026 Intersolar press release describes SigenStor Neo as an all-in-one unit combining inverter, battery and gateway, with a Smart Port intended for third-party loads such as heat pumps (Sigenergy press release via pv magazine).

AI-scheduled heating. Room temperature and scheduling are managed through an AI agent in the mySigen app, which uses energy-management data, routine loads and dynamic tariffs to heat during cheap periods and flag potential faults. During a grid outage the system is said to run on battery power to maintain the home's climate (Taiyang News). The press release adds a "2-in-1" control panel, flexible indoor-outdoor unit pairing and Wi-Fi plus Sub-1G communication (pv magazine).

What we do not know yet

Everything above is vendor description. Independent testing, UK pricing, availability dates, installer rollout and kW sizes are all missing from the coverage we found (pv magazine). Treat the "AI" claims as marketing until real-world performance data appears. The key unknown is whether SigenFlux will be certified for the government grant: the Boiler Upgrade Scheme requires an MCS-certified installer and eligible, certified equipment (GOV.UK). Until Sigenergy confirms that, assume no grant eligibility. Our Boiler Upgrade Scheme update explains how the grant currently works.

Why a battery-linked heat pump matters for solar homes

Heating demand peaks when solar output is weakest, so a heat pump rarely runs on solar alone in a UK winter. The realistic benefit of a linked battery is shifting grid electricity to cheaper tariff windows and using stored summer-shoulder solar for hot water. That makes the control software and your tariff at least as important as the hardware. Our guide to heat pump running costs shows how much tariff choice moves the bill, and are heat pumps worth it in the UK covers the wider decision.

Should you wait for SigenFlux?

If you already have a SigenStor, it is worth asking your installer whether SigenFlux will be offered and when. If you are choosing a battery now, do not buy on the strength of an unpriced heat pump: compare batteries on their own merits, starting with our SigenStor review and the Sigenergy vs Sungrow vs Solis comparison. If your boiler is failing, get quotes for heat pumps that are available and MCS-installed today rather than waiting for a product with no UK price.