Energy storage solutions
Energy storage solutions include systems and technologies that temporarily store electrical energy so that it can be made available again when needed. In practice, these are usually battery storage systems that absorb surplus electricity—for example, from photovoltaics or low-cost grid times—and release it later when demand is higher. In this way, they help to stabilize the power grid, bridge supply bottlenecks, and cover peak loads. Battery storage systems thus make an important contribution to a sustainable and independent energy supply by optimizing the use of renewable energies. Compared to simple emergency power batteries, modern energy storage systems offer numerous advantages: They reduce electricity bills, increase security of supply, and are extremely cost-efficient thanks to their modular expandability.
Typical applications for energy storage solutions are diverse: they range from optimizing self-consumption in conjunction with solar power and peak shaving to reduce grid fees, to emergency power supply during power outages. Companies can also save energy costs with battery storage, e.g., by shifting electricity consumption to cheaper times or using it as a buffer for fast charging stations to avoid expensive grid upgrades.
Our company plans and implements energy storage solutions for both private households and commercial enterprises. We primarily rely on the proven technology of Victron Energy, a leading manufacturer of modern energy storage systems with applications ranging from off-grid homes to commercial installations. Victron has more than 40 years of experience and has made a name for itself through high reliability – its products have been tested under a wide variety of conditions. For larger industrial storage systems, we also rely on high-voltage battery systems from other leading manufacturers, as commercial installations often operate with battery voltages in the range of several hundred volts. This enables us to offer optimal solutions in the commercial and industrial (C&I) sector that combine high performance and efficiency with the flexibility and quality of the Victron technology we install.
Why is energy storage worthwhile today—both for private households and businesses?
- In households, storage enables a higher self-consumption rate of your own solar power generation—less feed-in, more self-consumption.
- For commercial and industrial customers, it offers peak shaving, thereby reducing power-related grid fees or increasing the connected load. (E.g., companies with highly fluctuating load profiles)
- In addition, you gain resilience: emergency power supply in the event of a grid interruption, better grid support, and future-proofing in an increasingly decentralized energy supply.
What is a reasonable way to approach the topic of energy storage?
When planning a storage solution, I recommend this pragmatic approach:
- Consumption and generation analysis: Record load curves, own consumption, feed-in surpluses.
- Define objectives: Do you want to increase your own consumption, reduce peak loads, or build up an emergency power reserve?
- Check technical feasibility: Voltage situation, space requirements, cooling, connection conditions.
- Economic and subsidy analysis: Electricity prices, grid fees, subsidy programs.
- System design including monitoring & control: Selection of battery, inverter, EMS, integration into existing system.
- Installation & commissioning: Professional installation, commissioning, test run, training.
- Monitoring & operation: Ongoing monitoring (e.g., via VRM at Victron), maintenance, expansion if necessary.
What exactly is a modern energy storage system?
An energy storage system (ESS) typically consists of a battery (e.g., LFP), an inverter/converter, a battery management system (BMS), and a control/monitoring unit. It is connected between the energy source (e.g., photovoltaics), consumption, and the grid in order to store excess energy and make it available when needed. Its function is to temporarily store energy generated during the day and make it available at times of high load or grid interruption.
FAQ – What matters to customers when it comes to energy storage systems
An energy storage system is worthwhile if it fits your energy profile – and this is often misjudged.
The financial advantage does not come about through “magic,” but through three specific effects:
-
Higher self-consumption
You use more of your own PV energy yourself instead of feeding it into the grid cheaply and buying it back at a high price. -
Lower electricity costs in the evening/at night
The storage system replaces expensive grid electricity during the hours when you consume the most. -
Greater security of supply
Many users report that they value the storage system primarily for the peace of mind and independence it provides – not for the return on investment.
Our recommendation:
Don't make money from the battery – make money from better energy management.
Plan your storage system based on real consumption data, not gut feeling.
In many cases, the payback period is between 6 and 10 years – or even less in the case of high load peaks or high electricity prices.
Good lithium batteries are designed to last 10–15 years or 6,000+ charging cycles.
Over the years, the usable capacity decreases slightly—this is normal. However:
- The system remains fully functional, only the range decreases slightly.
- The battery does not lose capacity “suddenly,” but slowly and predictably.
- Monitoring systems show early on how the capacity is developing.
And most importantly:
In 90% of cases, only the battery needs to be replaced later – not the entire system.
Inverters, Victron hardware, current sensors, fuses, etc. remain intact.
Our recommendation:
If you are planning for the long term, look for modular systems.
This way, you can simply upgrade in 10 years instead of starting from scratch.
Mistake 1: Battery too large – PV system too small
A storage unit that rarely fills up does not save money.
Rule: First optimize PV output, then determine storage capacity.
Mistake 2: Incorrect power-to-capacity ratio
If the inverter is too powerful or the storage unit is too small, operation will be unstable – inefficient and bad for the battery.
Mistake 3: Planning “by feel” instead of by data
Many choose “10 kWh because that's what everyone else does.”
Better: Analyze 2 weeks of real load profile data – especially mandatory in commercial applications.
Our recommendation:
Storage size = (daily consumption + PV profile + target) / 3 factors
And never blindly choose a standard package.
A good ESS feels “unobtrusive” in everyday use – because it perfectly matches consumption.
The most important question for many users is:
“Does the system work when it's really needed?”
The honest answer:
A professionally designed system can bridge a power outage immediately and without interruption—often you don't even notice that the grid is down.
Important to know:
- An ESS is not a replacement for a diesel generator that can run for weeks.
- It keeps critical consumers running: lights, heating, routers, IT, refrigerators.
- The amount of time it bridges depends on the battery size and your consumption.
Many users report that it was only after experiencing their first power outage that they realized the true value of the storage system:
peace of mind, security, no panic in the dark or when working from home.
Our recommendation:
Plan which consumers are really important in an emergency.
Only connect these to the “backup circuit.”
This will make the battery last longer – and the system will remain reliable
On Reddit and in the Victron community, you often see the same concerns:
- “Why does my state of charge remain at 30%?”
- “Why isn't my ESS charging the way I thought it would?”
- “Why does my electric car drain the battery at night?”
- “Why is my system feeding into the grid even though I don't want it to?”
The truth:
Victron, BYD, Pytes, and others are extremely powerful—but also extremely flexible.
A dream for professionals.
Sometimes confusing for end users.
The key point:
If the system has been professionally planned and configured, it will later be as easy as an app for you:
- Select operating mode
- Set charging/discharging limits
- Optional: Set electricity rates for nighttime electricity or “dynamic rates”
- Done
The energy management system automatically takes care of the rest – that's exactly what it's there for.
Our recommendation:
Leave the complexity to the installer or to us – not to you.
A good ESS is “smart in the background” and does not require any technical knowledge in everyday use.
