Solar pays best at noon. A farm does not. Milking, cooling, drying and workshop equipment run from before sunrise until late in the evening, so a large part of the electricity the roof produced was leaving the site while the farm bought its evening power back from the grid. A SolisStorage EverCore battery system closed that gap.
Client story · Battery storage
From 45% to 80% savings: battery storage for a farm in Žarnov
The panels were already on the roof. The battery is what turned a 45% saving into 80%.
45% → 80%
Share of energy the farm now covers itself
120 kWh
Stored at midday, used in the evening
60 kW
Power available on demand
Sunshine at noon, work at six in the morning
The photovoltaic system on this farm in Žarnov, in the Košice-okolie district, had been working for a while and was already cutting the bill. But production follows the sun, and consumption follows the working day.
Without storage, only the electricity used at the exact moment it was produced counted. Anything extra at midday left the site; every kilowatt-hour after sunset was bought back. That mismatch is what held the savings at roughly 45%.
Why storage beat adding more panels
More panels would have produced more energy at exactly the hours the farm already had a surplus. Storage solves the other half of the problem: it moves energy the farm has already paid for to the hours when the farm actually needs it.
The EverCore cabinet was connected to the existing installation. Nothing about the original system changed. Midday surplus now charges the batteries and runs the farm in the evening and early the next morning.
What was installed
- SolisStorage EverCore C&I
- 60 kW rated power
- 120 kWh storage capacity
- LFP cells, 8,000 cycles
- IP66 inverter, IP55 cabinet, C5 anti-corrosion
- Scalable to 1.25 MW / 15.66 MWh
The result
Before: photovoltaics only
- Around 45% of consumption covered by own production
- Surplus left the site at midday
- Evening and early morning bought from the grid
After: photovoltaics + EverCore
- Up to 80% of consumption covered by own production
- Midday surplus stored on site
- Evening and early morning run on stored solar
Results as reported by Solis for this project. Actual savings depend on the consumption profile, the size of the photovoltaic system and energy tariffs.
What it means for your site
If the panels are already up, storage is usually the fastest way to get more out of them. Energy produced at midday runs the site in the evening, so you buy less at the times electricity costs most, and you install nothing new on the roof.
The sites that gain the most are the ones that work outside the sunniest hours: farms, workshops, cold stores, hotels and any plant that starts early or finishes late.
Questions owners ask us
In most cases, yes. In Žarnov the EverCore was added to a system that had been in operation for years. An installer checks the existing inverter, the grid connection and your consumption profile, and sizes the battery from there.
It depends on how much energy you use outside peak solar hours, on the size of your photovoltaic system and on your tariffs. On this farm the share of self-covered consumption went from around 45% to up to 80%.
It is modular. This farm uses 60 kW / 120 kWh, and the same platform scales to 1.25 MW / 15.66 MWh by combining units, so the system can grow with your consumption.
Tell us your consumption and your existing installation and you have a sizing proposal within a week. Delivery and commissioning depend on the configuration and the grid connection.
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