Grid-tied battery energy storage systems (BESS)
Stop letting grid limits stall your growth - we design, install, and maintain tailored grid-tied BESS systems to give you control of costs and when and how you use power
Smooth out energy demand spikes
Cut your operating costs
Unlock new revenue streams
Growing businesses shouldn’t be held back by the grid - grid-tied battery energy storage systems (BESS) make sure they’re not.
Access to reliable, affordable power shouldn’t decide whether your organisation can grow. Yet rising demand, supply constraints and costly delays leave too many businesses stuck - unable to expand, cut costs or make the most of their renewables. Grid-tied battery energy storage systems (BESS) removes that barrier. It gives you the flexibility to use power on your own terms - unlocking growth, lowering bills and supporting your move to cleaner energy.
What is grid-tied BESS, and how does it work?
A grid-tied battery energy storage system (BESS) stores electricity for later use. It draws from the grid at low-tariff times or from on-site generation such as solar, to charge the system before discharging during periods when supply is constrained or demand is high.
This means you can expand operations, or run new equipment like add EV chargers, without waiting years for grid reinforcement. At the same time, you gain flexibility to smooth demand, avoid peak tariffs, and integrate more renewables with maximum return. In short, grid-tied BESS gives commercial and industrial businesses control over when and how they use power, unlocking capacity and resilience while supporting sustainability goals.
What is grid-tied BESS, and how does it work?
A grid-tied battery energy storage system (BESS) stores electricity for later use. It draws from the grid at low-tariff times or from on-site generation such as solar, to charge the system before discharging during periods when supply is constrained or demand is high.
This means you can expand operations, or run new equipment like add EV chargers, without waiting years for grid reinforcement. At the same time, you gain flexibility to smooth demand, avoid peak tariffs, and integrate more renewables with maximum return. In short, grid-tied BESS gives commercial and industrial businesses control over when and how they use power, unlocking capacity and resilience while supporting sustainability goals.
Cut costs, unlock growth, and stay ahead with grid-tied battery storage.
Grid-tied battery energy storage systems (BESS) are helping UK businesses, councils, and renewable energy projects take control of their power. By charging from the grid at off-peak times or capturing surplus solar generation, then discharging when demand and tariffs are high, our grid-tied BESS solutions cut costs, smooth demand spikes, and improve resilience. From EasyGrid systems for commercial sites to installations for industry, we design, install, and maintain tailored battery storage that unlocks growth without waiting years for grid upgrades.
Choose the right grid-tied battery storage solution (BESS) for your commercial or industrial needs
Time-of-day energy optimisation
Shift your energy use away from expensive peak hours. By charging batteries on cheaper overnight tariffs and discharging during the day, you can flatten bills and avoid costly demand charges.
Limited power supply management
Don’t let grid constraints hold back growth. Grid-tied BESS covers demand spikes so you can expand operations without waiting years for reinforcement from the national grid.
Solar self-use for commercial sites
Get the most from your solar investment. Store surplus daytime generation and use it in the evenings or early mornings, when grid electricity is at its most expensive.
Arbitrage opportunities with smart controls
Turn volatility into value. Buy electricity when prices are low, use it to power your site or sell it back to the grid when rates climb - all managed automatically by smart controls.
Core components of a grid-tied battery energy storage solution (BESS)
Every commercial and industrial BESS includes four core elements, designed to integrate safely and efficiently with your site’s power infrastructure.
Battery modules (typically Li‑ion/LFP): store electricity safely and reliably until you need it.
Power conversion system (inverter/PCS): converts stored DC into usable AC power for your site, and vice versa when charging.
EMS (Energy Management System)/controls:smart
software that manages charging and discharging to match your tariffs, loads, and solar PV profile - maximising savings.
Switchgear, metering and protection: ensures seamless integration with your existing UK electrical infrastructure while keeping systems safe
Our EasyGrid battery energy storage systems can be stored in all-weather enclosures outdoors or installed indoors. We configure power to match the size of the peak you need to shave, and energy to cover the duration you need. Everything is tailored to your bespoke needs, sized from real site data, your tariffs and your operational plans. We specify proven battery chemistries and integrate monitoring, protection and enclosure design appropriate to the environment.
Why choose immersion cooling for your grid-connected BESS?
As energy systems transition to renewables, Battery Energy Storage Systems (BESS) are a key tool in addressing grid congestion, enabling peak shaving, and overcoming supply constraints for commercial and industrial users and developers. New developments often face grid connection challenges, and this is where developers, DNOs, IDNOs, and ICPs increasingly rely on BESS to make projects viable.
These applications are frequently located in environments where safety must be engineered in from the outset. Dense, built environments place additional demands on battery storage systems - particularly where installations are near buildings, critical infrastructure, or within regulated sites.
Battery systems have a strong safety record, but understandably some locations are more sensitive than others. This includes city centre sites or installations adjacent to commercial premises such as offices or hotels, where planning and proximity constraints require additional risk mitigation.
Immersion cooling is specifically suited to these environments. By fully submerging battery cells in a thermally conductive, non-conductive (dielectric) fluid, heat is removed efficiently from all surfaces - supporting consistent performance under sustained, high-demand operation.
Immersion cooling also provides an additional layer of protection by fundamentally changing how heat and gases are managed within the system in the event of a failure:
Rapid heat absorption
the dielectric fluid removes heat directly from all cell surfaces, reducing the likelihood of critical temperature escalation
Thermal event suppression
In the unlikely event of cell failure, the surrounding fluid helps limit temperature rise and slows propagation to neighbouring cells, while cooling emitted gases below their spontaneous combustion temperature
Reduced oxygen exposure
Submersion helps isolate potential off-gassing from ambient oxygen, lowering the risk of combustion
Contained environment
Heat and gases are managed within a controlled system, supporting safer deployment in constrained or sensitive locations
This makes immersion-cooled systems particularly well-suited for installations where safety, permitting, and proximity constraints are key considerations—and can help projects meet requirements that might otherwise be difficult to satisfy.
How do plate-cooled (indirect) systems compare?
In plate-cooled systems, cells are mounted to liquid-cooled plates. Heat transfers from the cell through interfaces into the plate, and then into circulating coolant.
This approach is widely used across many battery applications and offers a proven, efficient solution - particularly where operating profiles are less continuous or less demanding.
What does immersion cooling (direct) offer?
In immersion-cooled systems, cells are fully submerged in a dielectric fluid. Heat is removed directly from all cell surfaces and carried away through fluid circulation.
Key benefits for grid-connected systems include:
Benefits:
- Uniform thermal management: minimises temperature variation across cells
- Efficient heat removal: direct contact reduces thermal resistance
- Enhanced safety characteristics: supports mitigation of thermal propagation
- Support for high utilisation: well-suited to continuous cycling and high loads
- Reduced thermal stress: contributing to longer system lifespan
While immersion cooling introduces a higher upfront cost, the total cost of ownership is comparable to plate-cooled systems due to improved cycle life and reduced thermal degradation.
Why it matters for grid applications
Given these performance and safety characteristics, immersion cooling delivers clear advantages in grid-connected environments:
Robust safety in densely deployed or regulated environments
Long service life despite frequent cycling
Choosing the right approach
Both cooling strategies play an important role across different energy storage applications:
Plate and traditional cooling systems are well-suited to more remote or less sensitive sites and typically offer a lower upfront cost
Immersion cooling is optimised for safety and performance in grid-connected environments, where consistency, risk mitigation, and longevity under continuous operation are critical
Technical specification:
| Output power from battery power | kW | 130 | ||
| Input power from grid | kW | 130 | ||
| Output voltage | VAC 3/N/PE | 220V/380 230V/400 | ||
| Battery capacity | kWh | 261 | ||
| Battery nominal voltage | V DC | 768 | ||
| Operating ambient temperature | Deg C | -20 - 50 deg | ||
| Battery cooling | Immersion cooling via air to fluid AC | |||
| IP rating | IP55 | |||
| Input connection (standard) | Hard wired terminal | |||
| Weight | kg | 3,500 | ||
| Dimensions | D x L x H mm | 1450 x 1400 x 2500 | ||
| Output power from battery power | 130kW | |
| Input power from grid | 130kW | |
| Output voltage | 3/N/PE;220V/380VAC 3/N/PE;230V/400VAC | |
| Battery capacity | kWh | |
| Battery nominal voltage | 768V DC | |
| Operating ambient temperature | -20 - 50ºC | |
| Battery cooling | Immersion cooling via air to fluid AC | |
| IP rating | IP55 | |
| Input connection (standard) | Hard wired terminal | |
| Weight | 3,500kg | |
| Dimensions (D x L x H) | 1450 x 1400 x 2500mm | |
Return on investment in grid-tied battery energy storage solutions (BESS) for UK businesses - what usually moves the needle
The ROI from an EasyGrid FLEX grid-tied battery energy storage solution (BESS) depends on your site’s energy profile, but UK businesses typically see measurable savings and operational gains within just a few years. Here’s where the biggest wins usually come from:
Tariff spread
The wider your peak vs off-peak difference, the faster your payback. Charging at night and discharging during the day flattens bills.
Peak demand charges avoided
Even shaving just a few minutes of peak load each day can translate into thousands saved annually.
Solar uplift
Store and use more of your own solar PV generation instead of exporting at low rates - improving renewable returns.
Operational benefits
Expand operations without waiting years for a grid upgrade, improve site resilience, and meet ESG and sustainability goals.
Your trusted expert partner in UK grid-tied battery energy storage solutions (BESS)
Expanding capacity or controlling costs with the grid can be complex. That’s why businesses across the UK turn to Energy Solutions. With over 30 years’ experience in advanced hybrid power systems, we design, assemble and support grid-tied BESS that give organisations flexibility and confidence in their power supply.
Our projects range from 15kVA systems for office campuses through to 500kW installations for commercial and industrial uses. Every system is built and supported in the UK, integrating seamlessly with solar PV, EV charging and existing grid connections to deliver reliable, intelligent power where it’s needed most.
Proven performance
From factories adding new production lines to councils deploying EV hubs, our systems can deliver significant measurable results.
Seamless integration
Our BESS systems are designed to work with your existing grid connection, solar PV, or EV infrastructure.
Expert UK support
Our team provides guidance from assessment through to installation, with ongoing monitoring and service.
Trusted suppliers of battery energy storage solutions (BESS) to
Your path to resilient grid-tied power
Step 1 - Consultation and assessment
We review your energy profile, growth plans and site constraints to understand exactly what’s holding you back.
Step 2 - Tailored proposal
You receive a clear design and business case for a grid-tied BESS solution - including how it integrates with your grid supply, solar or EV charging.
Step 3 - Installation and ongoing support
We coordinate installation and commissioning, with your system delivered pre-configured by our engineers. Remote monitoring ensures it performs from day one, giving you the capacity, cost control and resilience to operate with confidence.
How EasyGrid grid-tied battery storage could be used to unlock capacity and control costs
Factory expansion without a grid upgrade
A manufacturer wants to add a new production line but faces a three-year wait and a six-figure bill for grid reinforcement.
How BESS helps: An EasyGrid grid-tied system could charge on off-peak tariffs and discharge during daytime peaks, enabling expansion immediately and avoiding relocation costs.
Office complex managing peak energy tariffs
A multi-tenanted office building sees energy bills spike each afternoon as demand peaks, pushing up costs and affecting EPC ratings.
How BESS helps: Your EasyGrid system could charge overnight or from on-site solar, then discharge during peak hours. This would flatten demand, lower annual costs, and improve efficiency ratings for tenants.
Public EV charging hub
A city council wants to install rapid chargers, but contracted grid capacity can’t support the load at busy times.
How BESS helps: With our EasyGrid system you could store electricity overnight at lower tariffs, then release it to cover daytime peaks. This would allow simultaneous EV charging without breaching supply limits, while also enabling revenue from price arbitrage.
EasyGrid: Grid-tied battery storage solutions you can count on
Solving grid constraints doesn’t have to be complex. Ignoring them only means stalled growth, rising costs, missed sustainability targets and reliance on outdated back-up options. Our EasyGrid grid-tied battery energy storage solutions give you the flexibility to expand without waiting years for grid reinforcement. They integrate seamlessly with your existing supply, solar or EV charging, so you gain capacity, cost control and resilience - with expert UK support at every stage.