Win more projects. Deliver them with confidence.
Immersa is the leading technical partner behind solar installers, EPC Contractors and Renewable businesses across the UK for Commercial Battery Storage.
We don't compete with you. We extend your team. From the first bid through to long-term asset management, we bring the engineering, product supply and technical backing you need to win Commercial Battery work and deliver it well.
30 to 5000
kW + Solutions
20,000+
kW battery deployed
39,800+
kWh battery capacity
Who we work with
Immersa is built for the teams who deliver projects on the ground. If any of these sound like you, we should talk.
Solar Installers
You're adding BESS to your offering and want battery modelling, engineering depth and a supplier without hiring an in-house team.
EPC Contractors
You're delivering complex small or large commercial & industrial projects and need a technical partner to integrate Commercial Battery Storage.
PPA and Funding Providers
You're shaping a project from the ground up and need feasibility, modelling and a route to delivery for Commercial Batteries.
Battery Aggregators
You need a Commercial Battery Partner to support you with complex modelling, engineering, and delivery support to deliver revenue excellence.
Bring us in at any stage. Earlier is better.
Our best projects start with a conversation before the tender lands. But wherever you are in the project, we can step in.
At bid or tender
We help you shape a credible Battery proposal with or without Solar. That means sizing, modelling and pricing the system so you can quote with confidence and win the work.
Talk to us about a live bidDuring design & planning
We deliver the Battery engineering package: G99, single-line diagrams, hybrid architecture and DNO coordination. Your design gets sorted before anyone breaks ground.
Get design supportOn-site & commissioning
We back your delivery team with installation guidance, Battery supply and commissioning support, so the system performs as modelled from day one.
Ask about on-site support“It has been a real joy to work with Immersa and AlphaESS for the installation at Hill Farm. Lewis, Peter, Oliver and the team are so helpful, always quick to pick up the phone or reply to an email, and the technical support is excellent. Having an AlphaESS engineer come to commission the system as standard means that we can trust that everything will run smoothly from day 1. We look forward to working with Immersa and AlphaESS on many more projects in the future!”
Laura Greenish
Solar Design Engineer, Natural Generation
How we support you
Six ways we can support your delivery. Battery supply at the core, and add the support you need around it — whether that's the one piece or the full package, we will flexibly plug into your team where it adds the most value.
Battery modelling, load analysis and financial cases built around the way your clients actually use energy.
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Full system architecture, hybrid-coupling, G99 documentation and DNO coordination, handed over as a package your install team can execute.
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Commercial AlphaESS batteries and balance-of-system components held in UK stock, with technical specification support included.
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Technical guidance through site prep, install and commissioning, plus on-site support from AlphaESS engineers when you need it.
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Performance monitoring, optimisation and ongoing support to protect the client's investment and strengthen your relationship with them.
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Our investor and aggregator network helps installers unlock funding and revenue stacks that make commercial Battery projects bankable.
Learn moreHow it works
A straightforward path from first call to delivered project, and the long relationship that follows.
Discovery call
Tell us about the project, the client and where you need support. No sales pitch. We'll tell you quickly whether we can add real value.
Joint scoping and design
We model the investment system, shape the engineering package and agree exactly where Immersa fits into your delivery team.
Delivery support
Product supply, install guidance and commissioning support, delivered alongside your team and not in place of it.
Ongoing partnership
Asset management, repeat projects and a relationship that grows with every site we deliver together.
Why installers choose Immersa
We're not a reseller, and we're not a rival installer. We're the technical partner that sits quietly behind your delivery team, making sure every project lands well.
- AlphaESS authorised UK partner with direct manufacturer technical support to guarantee product excellence
- UK-based engineering team with full G99 and DNO coordination experience
- Proven track record on small and large commercial & industrial projects
- Investor and aggregator network to unlock funding and revenue stacks for our Battery Solutions
- Full lifecycle support, from feasibility through to asset management
- Service-led, not product-led. We win when your project wins.
Projects we've delivered with our partners
Ready to deliver your next Commercial Battery project with us?
Whether you've got a live bid, a project on the drawing board, or just a question about how we work, we'd love to hear from you.