Sigenergy Battery Storage Cornwall.
Sigenergy's SigenStor packs solar inverter, battery, EV charging and smart energy management into one unit rather than several separate boxes on your wall. We fit it as part of a fully surveyed, MCS certified installation, sized around your home's actual usage rather than a one-size-fits-all package.
Residential batteries also qualify for 0% VAT until 31 March 2027: see full details
One unit, built to scale.
All-in-One Hybrid Design
Sigenergy is one of the newest names in battery storage, built around a genuinely different approach: rather than pairing a separate inverter and battery, the SigenStor system combines both into a single all-in-one unit. That means less equipment on your wall, a simpler installation, and fewer connection points that can fail or need servicing down the line.
The SigenStor combines the inverter and battery into a single all-in-one unit. The inverter converts the power your battery stores into electricity your home can actually use, and having both in one unit means fewer connection points and a simpler install.
Modular and Scalable
Capacity is fully modular. You start with a base unit and add extra battery modules as your needs grow, rather than committing to a fixed size upfront or replacing the whole system later. That flexibility suits Cornwall households who might add an EV or heat pump in a few years and want a battery that can scale with them, rather than starting again from scratch.
Efficient, Smart Monitoring
Sigenergy's cells are built for high round-trip efficiency, so less of the energy you store is lost as heat before you actually use it, a genuine difference in how much you save over a year, not just a spec sheet number. The system also comes with smart app monitoring, so you can see exactly how much you're storing, using and exporting in real time, and adjust settings like time-of-use charging without needing to call us out.
10-Year Warranty
Sigenergy backs the SigenStor system with a 10-year warranty, giving you the same manufacturer-backed confidence as more established battery brands, while still benefiting from its newer all-in-one design.
Fully Certified Installation
SigenStor's standout feature is its built-in EV DC charger. Most home chargers run on AC and top out around 7kW, but SigenStor's DC charging can be faster and more efficient, which helps most when solar generation is low. Get in touch for a free quote and we'll talk through whether Sigenergy is the right fit for your home.
Built around modular design.
All-in-One Hybrid Design
Inverter and battery combined into a single unit, for a simpler installation.
Modular & Scalable
Add extra battery modules later as your usage grows, without starting again.
High Round-Trip Efficiency
Less energy lost between storing and using power, for genuinely better savings.
Smart App Monitoring
See exactly what you’re storing, using and exporting, and adjust settings in real time.
Is Sigenergy right for you?
Sigenergy suits you if you want the simplest possible setup, with the inverter and battery combined into one unit, and fewer components to think about both during installation and over the system's lifetime.
More ways we can help.
Common Questions
Sigenergy combines the inverter and battery into one all-in-one unit, rather than pairing two separate components, for a simpler installation and fewer connection points.
Yes, the system is fully modular, so you can start with what you need now and add battery blocks later as your usage grows.
I cannot recommend Holloway Electrical highly enough. From the planning of our solar and battery installations through to the final commissioning Jamie's took care of everything. Organised other trades to assist, explained everything that was going on and completed the job on time as promised to an exceptional standard, I could not be happier.
We experienced a very friendly and helpful service from Jamie with our new kitchen electrics. We would highly recommend his services.
We are so pleased with the work that Jamie completed for us today, supplying power to our apartment garage and installing sockets and EV charger. The quality of the work is outstanding. I highly recommend Holloway Electrical Ltd, definitely our electrical professional for all future requirements!
Hi Jamie, Kieran did a great job and we are both very pleased with it. Thank you very much. I would like to discuss with you the electrical box in the kitchen which will need to be replaced. PEH
A lovely local company to deal with. Efficient and left everything clean and tidy. Highly recommend.
Great communication, excellent service, great price, 100% recommend.
We had several quotes from Electricians to install our EV charger which varied dramatically. Jamie’s quote was by far the most reasonable and he was the only one who bothered to come to our home and look at the charger etc. before taking on the job. He arrived on the agreed date of installation and was personable, efficient and tidy. I would have no hesitation in recommending Jamie and would be happy to call on his services again in the future.
Jamie provided us with a personable, friendly and efficient service when installing our new EV charger. I would have no hesitation in recommending him.
I cannot recommend Holloway Electrical highly enough. From the planning of our solar and battery installations through to the final commissioning Jamie's took care of everything. Organised other trades to assist, explained everything that was going on and completed the job on time as promised to an exceptional standard, I could not be happier.
We experienced a very friendly and helpful service from Jamie with our new kitchen electrics. We would highly recommend his services.
We are so pleased with the work that Jamie completed for us today, supplying power to our apartment garage and installing sockets and EV charger. The quality of the work is outstanding. I highly recommend Holloway Electrical Ltd, definitely our electrical professional for all future requirements!
Hi Jamie, Kieran did a great job and we are both very pleased with it. Thank you very much. I would like to discuss with you the electrical box in the kitchen which will need to be replaced. PEH
A lovely local company to deal with. Efficient and left everything clean and tidy. Highly recommend.
Great communication, excellent service, great price, 100% recommend.
We had several quotes from Electricians to install our EV charger which varied dramatically. Jamie’s quote was by far the most reasonable and he was the only one who bothered to come to our home and look at the charger etc. before taking on the job. He arrived on the agreed date of installation and was personable, efficient and tidy. I would have no hesitation in recommending Jamie and would be happy to call on his services again in the future.
Jamie provided us with a personable, friendly and efficient service when installing our new EV charger. I would have no hesitation in recommending him.
Get your free Sigenergy quote.
No obligation. We'll call you within 24 hours.
Serving homes and businesses across Cornwall.
Based in St Austell, we install throughout the following towns and the surrounding villages.
