SigenStor

Yes, if it is set up for it. Sigenergy quotes 0 ms load-side disruption, but only when its Energy Gateway is fitted together with the Energy Controller and battery. As with any battery, backup is a specification choice made at the start, and we would plan which circuits it covers at survey. Peak output in off-grid mode is limited to twice the controller's nominal output for 10 seconds, so heavy loads such as an electric shower need checking.

Sigenergy designs the battery to be stacked, up to six modules per Energy Controller, and says old and new modules can be mixed because each pack has its own optimiser. The limit is the controller: if you might want six modules, the controller and the battery's power rating need to suit that from day one. We would check this against your likely future needs at survey.

The SigenStor Energy Controller is a hybrid inverter with its own solar inputs, so it is designed to take the panels' output directly. If you have an existing system, the usual choices are to replace the old inverter with the hybrid or to add a separate AC-coupled battery. Sigenergy's published SigenStor datasheets do not describe an AC-coupled connection to a third-party inverter, so we would confirm the best route for your roof at survey.

Roughly the electricity you use in the evening and overnight, which for many Northern Ireland homes is 6 to 10 kWh. SigenStor's modules are 5.84 kWh and 8.76 kWh usable, so a single module covers a smaller home and two modules cover a larger one. Buying more than you cycle each day adds cost without adding savings, so we size from your actual usage.

Sigenergy markets SigenStor as including an EV DC charger, but lists the EV DC charging module as its own product with its own datasheet and warranty (3 years), and says it must be used with a Sigen Energy Controller. Treat it as an add-on to confirm when you ask for a quote. Many homes use an ordinary AC charger instead, and we can talk through which suits your car.

Sigenergy's Europe warranty document gives 10 years on the battery and Energy Controller, with a promise that the battery keeps 60% of its usable energy over that time. It requires installation by a skilled installer, an internet connection for updates and claims within 30 days. That document refers to Europe and does not name the UK, so we will confirm the terms that apply to a UK purchase with Sigenergy's UK supplier before you buy.

It uses lithium iron phosphate cells, the more thermally stable chemistry, and Sigenergy lists IEC/EN 62619 and UN 38.3 testing for the battery. The units are rated IP66 and can be installed outdoors or in a garage, within the temperature limits. Siting, ventilation and escape routes are covered in our installation checks.