Turnkey battery storage systems for solar parks
Profitability forecast: precise parking instead of a lump sum
Negative price hours, curtailments and grid restrictions are now part of everyday life for many solar park operators. Where photovoltaics used to be calculated primarily on the basis of high full-load hours and stable market prices, today time windows, operating modes and grid integration are increasingly determining profitability. This is precisely where a battery energy storage system (BESS) comes in: It makes yields controllable again, shifts energy specifically to valuable hours and opens up additional revenue options - provided that the storage system is properly integrated into the grid and is operated in an economically optimised manner.
With the new offer „Turnkey battery storage systems for solar parks - technology, infrastructure & marketing from a single source“, Faber E-Tec delivers battery storage projects as a complete system. This includes not only the storage container itself, but also the associated infrastructure: transformer technology, medium voltage, collective cabinets, cabling, ancillary systems as well as commissioning and handover. For operators and project developers, this means clear interfaces, one point of contact and a project setup that remains technically and organisationally manageable.
Profitability forecast within 7 days
Why storage is crucial now
Many solar parks are slowed down economically - not because the PV system is running poorly from a technical point of view, but because external framework conditions are depressing revenues. Negative electricity prices can result in feed-in having no value at times or even causing costs. Curtailments reduce the amount of energy fed into the grid, even though the system could actually be producing. And grid restrictions further limit the room for manoeuvre. A BESS can cushion these effects by absorbing energy when feed-in is unattractive and then providing it when the market or the grid makes sense. The decisive factor here is that a storage system is not a plug-and-play add-on - grid integration and the operating strategy make all the difference.
Three core services - one complete package:
Faber E-Tec bundles the range into three clear modules:
- Turnkey incl. infrastructure: From planning and delivery to commissioning - including transformer technology, medium-voltage integration and project-dependent auxiliary systems.
- Profitability forecast within 7 daysBased on your project or inventory data, we create a customised, park-accurate forecast, typically within 7 days of receiving the complete data.
- Marketing & storage tradingOn request, we can take over the marketing and operational optimisation via Faber Energy Trading - so that technology becomes a predictable operation and a reliable revenue strategy.
Turnkey battery storage systems - forecast in 7 days
Precise profitability forecast instead of standard calculation
A central component of the offer is the profitability forecast. This is because every site is different: the grid structure, feed-in point, output, generation profile and curtailment situation can vary considerably. This is why Faber E-Tec does not provide a generalised model calculation, but a specific forecast for your exact solar park - based on planning data (greenfield) or real operating data (existing).
Typical contents of the forecast:
- Memory size recommendation (kW/kWh) suitable for park and objective (e.g. negative hours, curtailment, marketing)
- Revenue and cost model incl. scenarios (conservative / realistic / ambitious)
- Sensitivity analysis (price assumptions, utilisation strategy, technical/network restrictions)
- For Existing parksBaseline analysis and assessment of potential through storage integration
What is needed for this is deliberately kept pragmatic.
For new construction/planning, information such as location, park capacity, feed-in point or grid level, desired concept and objective is helpful. For existing parks, a single-line diagram, transformer data, MV/LV structure and - if possible - generation/feed-in data and information on curtailment/negative hours are particularly valuable. It is also important to note that forecasts are simulation- and data-based; actual results depend on market prices, grid restrictions, regulatory requirements and operational management, among other things.
BESS solar parks
Marketing incl. storage trading
A storage system only becomes truly economical when it is operated appropriately. This is why Faber E-Tec offers not only the technology but also the economic implementation: marketing, storage trading and operational optimisation can - if desired - be taken over by Faber Energy Trading. The advantage lies in the consistency: technology + strategy + marketing set-up interlock instead of responsibilities being distributed between several parties.
Transformer compact station - Fast delivery!
4 Concepts for new builds and retrofits
There are four storage concepts - each including infrastructure, profitability forecast and optional marketing - so that the offer is suitable for different starting situations:
- New construction as a complete solution (PV + storage + EPC + marketing) - ideal for investors and project developers.
- Complete storage package for system installers (EPC-ready) - clear interfaces for EPCs who want to integrate the storage system as a complete package.
- Retrofit of existing park (variant A - new medium-voltage ring) - if a new, scalable MV structure is sensible or necessary.
- Retrofit existing park (variant B - utilise infrastructure, LV repowering) - fast, cost-efficient retrofitting by using existing transformers/stations (if suitable) and custom-fit new LV superstructures.
Faber E-Tec's vertical integration plays to its strengths in retrofitting in particular: in-house sheet metal and copper production as well as automated processes enable the rapid production of customised low-voltage solutions - ideal for reducing conversion times and continuing to use existing infrastructure in a targeted manner.
How to get to the store
The process is clearly structured:
- Define data & target (new build or existing building)
- Profitability forecast - usually within 7 days of data receipt
- Turnkey realisation - optionally supplemented by marketing & storage trading via Faber Energy Trading
FAQ: BESS, profitability & marketing
For which solar parks does a battery energy storage system (BESS) make sense?
For new and existing solar parks - especially when negative price hours, curtailments or grid restrictions limit revenues or when additional revenue options are to be developed through optimised operation.
What exactly does „turnkey“ mean at Faber E-Tec?
We not only supply the storage system, but also the complete system including engineering, transformer technology, medium-voltage integration, LV components (depending on the project), busbar cabinets, cabling/ancillary systems as well as commissioning and handover - with clear interfaces and a single point of contact.
How quickly do we receive the profitability forecast?
Usually within 7 days, as soon as all the necessary project and inventory data is available.
What is typically included in the profitability forecast?
A park-specific design (kW/kWh), a revenue and cost model with scenarios (e.g. conservative/realistic/ambitious), a sensitivity analysis and - for existing parks - a baseline analysis and the potential through storage integration.
What data do you need for new construction projects (greenfield)?
Typical criteria are location, parking capacity, feed-in point/grid level, desired concept and the objective (e.g. avoidance of negative hours, curtailment management, marketing).
What documents do you need for existing parks (retrofit)?
Ideally a single-line diagram, transformer data, information on the MV/LV structure and - if possible - generation/feed-in data as well as information on curtailment and negative price hours.
Can existing transformers and stations continue to be used?
Often yes - if the existing infrastructure is suitable. We check the technical suitability and, if necessary, can implement LV repowering with customised LV distributors/plates from our own production.
