Our Products
Made in Britain Energy Storage Systems

Solar PV Partners work with Multi Source Power’s team of experts to design, build, and deliver Battery Energy Storage Systems for both on and off-grid applications. Our high-performance modular BESS fully integrates into any power plant to accelerate return on investment on projects across the globe.
Our commercial BESS partners have a wealth of experience with solutions across the UK and Internationally, leveraging low OPEX, energy-dense technology to enable customers to optimise their energy objectives and create new revenue streams from frequency balancing, curtailment and other grid services, including dynamic containment.
Energy storage systems also provide solutions to projects outside of traditional markets, where stable power can be scarce and investing in the right equipment is vital in providing consumers, businesses and investors with stable power grids. Our grid-forming BESSs tour the globe fuelling high profile events, providing power solutions to some of the remotest communities and reinforce island grids through hybridisation, DC-coupled solar and other renewables.
Multi Source Power systems are proudly British Made, working to enable the UK and countries around the world to achieve their net zero carbon ambitions.

Flex-ESS250
The most flexible all-in-one energy storage solution
The Flex-ESS250 hybrid power system is a high-density, modular energy solution. Reduced project risk and cost due to simple installation, small footprint, and lightweight construction. Low operating costs with enclosed cooling and durable housing. Integrating KORE Power energy storage and our ground-breaking FLEX Inverter, Flex-ESS250 achieves an industry-leading, optimised footprint for applications where space is constrained, or at a premium. Working with multiple power sources and output configurations, the Flex-ESS250 provides the ultimate, flexible approach for most applications.
- Modular for flexible energy storage configurations
- Market leading power density and efficiency
- Ultra-Low Installation Cost/Time
- DC Coupled Solar
- Manufactured in Great Britain

Flex-ESS500
Engineered for low project overheads
Flex-ESS500 provides a plug-and-play, factory built-and-tested energy storage solution designed for low cost project overheads. It integrates an efficient inverter with high-performance storage, offering both off- and on-grid functionality.
- Inverter: Reduced infrastructure & component costs, UPS function for facility protection, on/off grid forming and following with peak efficiency up to 98.6% (lowest 97%) and outdoor housing IP64 (indoor version available)
- Storage: Long lifespan (5000 to 6000 cycles, 10/15/20 year lifespan), British-engineered with extendable warranties, maximum safety with modules certified to UL9540A, expandable and optimised via the Master/String-Rack Controller (SRC), and Li-ion Tamer off-gas protection
- BESS: Modular and expandable solution; thermally insulated and ultra-durable housing ensures ideal climatic conditions, with minimized parasitic loads by water cooling the inverter and HVAC for KORE Mark 1 batteries, resulting in class-leading efficiencies.

Flex-ESS1000
Utility-Scale Modular Storage System
- 1Hr to 4Hrs + storage capability
- Ultra-Low Lifetime Op-Ex
- Ultra-Low Installation Cost/Time
- Manufactured in Great Britain
The Flex-ESS1000 integrated energy storage system is a high-density, modular energy solution. Low operating costs due to its enclosed cooling and IP64 housing. Integrating KORE Power Mark1 storage modules and EPC’s CAB1000 inverter, Flex-ESS1000 achieves an industry-leading, density-optimising footprint for applications where space is constrained or at a premium. Working with multiple power sources and output configurations, the Flex-ESS1000 provides the ultimate, flexible approach for scalable ESS applications.
Alpha ESS Storion Systems
The Lithium Iron Phosphate (LFP or LiFePO4) battery systems from Alpha ESS are non-toxic, non-hazardous (no cobalt) and have very high efficiency charge and discharge rates, even in extreme climates. Storion Series are an all-in-one energy storage and management system for residential, agricultural, industrial and commercial applications.



Storion SMILE 5
Residential, Commercial
The STORION Smile 5, is the perfect complete energy storage solution for storing excess solar PV generation at home or in a business for self consumption. Power storage ranges from 5.7kWh to 22.8kWh. A 5kW inverter is included along with the Alpha Cloud software, which provides remote control of the system and helps to maximize savings. The 24-hour Alpha Cloud monitoring system via the user-friendly interface demonstrates real-time profit. Other benefits include:
- Worry-Free-Safe operation with built-in system protection mechanisms
- Prompt response to any problems with remote diagnostics
- Local technical support from Alpha engineers
- Free Upgrades for Life of System
- Easy to update your system online or via USB dri Prices for SMILE5 start at £3.3k for 5.7kWh storage, 5kW inverter and Alpha Cloud

Storion Eco-S5
Commercial
Schools, universities, government office buidlings, factories, petrol stations, and other commercial buildings with high levels of energy demand can maximize their energy independence and reduce grid power demand with solar PV and battery storage. Even businesses without solar PV systems can benefit from the ability of batteries to reduce peak power demand and shift grid consumption to off-peak hours.
AlphaESS provides a one-stop solution for commercial and industrial facilities seeking to save on electricity bills, reduce exposure to rising energy prices, generate additional revenues from renewable energy, and reduce their environmental impacts. AlphaESS's remote monitoring and maintenance platform, the AlphaCloud platform helps customers monitor the system's operating status in real time through web pages or mobile APPs, remotely set various functions, perform remote software upgrades for inverters, EMS and BMS.

Storion-T30/T50/T100
Commercial, Industrial
- Output 30 / 50 / 100 kW Max. Capacity 1032.2 kWh
- Battery M48112-S and Inverter Dimensions 1180 x 700 x 1500 mm
- Cluster Capacity Range 28.7 ~ 1032.2 kWh
- Inverter Weight 170kg w/o battery for 30kW 520 / 750 kg for 50 / 100 kW combined with battery
- DOD 90%, Certifications CE, IEC

Containerised energy storage solutions
Industrial, Utility, On-Grid and Off-Grid
AlphaESS also enable communities and companies with multiple distributed energy resources to share energy with a microgrid. This type of interconnected “Virtual Power Plant” is ideal for areas with no grid access, communities that want to disconnect from the network, or companies that want to provide renewable energy electricity supply. See press article link below: Alpha ESS powers Africa's largest solar & energy storage project for a hospital commissioned at FOCO.
Alpha Cloud
AlphaCloud platform provides monitoring of the system's operating status in real time through web pages or mobile APPs, remote setting of various functions and enables remote software upgrades for inverters, EMS and BMS.
- Safe operation with built-in system protection mechanisms
- Prompt response to any problems with remote diagnostics
- Local technical support from Alpha engineers
- Easy to update online or via USB drive
- Free Upgrades for Life of System

Industrial Batteries Regulation
As a distributor of industrial batteries under the Waste Batteries and Accumulator Regulations 2009, Solar PV Partners provide and have provided Aqueous Hybrid and Lithium Iron Phosphate (LFP) LiFePO4 batteries. We are obliged to take back waste industrial batteries supplied to an end user by us for treatment and recycling. We are required to do this in any calendar year we place new industrial batteries on the market. If any of our customers, or in certain cases other end users, require us to take back Industrial batteries, they should contact us at recycle@solarpvpartners.com. We will assist in the necessary arrangements for the return, proper treatment and recycling of the waste industrial batteries.