Advantages of electricity storage
Energy banks are a solution tailored to the needs of the modern world. The deepening energy crisis, rising electricity prices and unstable economic situation force citizens to seek new solutions that will provide them with a safe and stable future. Energy storage is undoubtedly one of them. Investing in an electricity bank guarantees a certain energy independence - instead of returning the produced surplus electricity to the grid, the prosumer keeps it for themselves. Storage increases self-consumption, i.e. allows for the maximum use of the produced energy. In addition, it gives the opportunity to immediately cover the demand for energy at peak times and protects against interruptions in the supply of electricity caused by grid failures or other unpredictable factors.
Home energy storage is an important element of the country's energy transformation. Hybrid PV micro-installations improve the functioning of the national power grid infrastructure - they enable rational and fully efficient management of energy resources.
Energy storage increases self-consumption
Increasing self-consumption of energy, and thus achieving partial energy independence and guaranteed savings on electricity bills, is undoubtedly one of the greatest advantages of investing in a power bank for the end customer. How much does the power consumption for the needs of the prosumer increase in the case of enriching the PV installation with a power bank?
Time for example. A typical photovoltaic installation installed in a household has a power of 5 kW and the household consumes about 4000 kWh per year. On average, the household uses about 22% of the energy produced - the rest goes to the grid. Installing a 5 kWh energy bank increases self-consumption by about 55%. Interestingly, in the case of typical households, the greatest increase in self-consumption is noted at the time of installation of a small energy storage, covering 50% of the daily demand for electricity. Conclusion? It is best to invest in banks with a small capacity - 5 kWh.
Hybrid Kit or Not? Profitability Comparison
Is it worth investing in a hybrid set? The retail price of a classic 5 kW PV installation is around PLN 28,000 net. The cost of the installation is PLN 22,000. The installer therefore gains PLN 6,000.
The cost of the above set for the customer is approximately PLN 30,000 gross. Assuming that the subsidy under the Mój Prąd program is maintained and the thermal modernization relief is used, the final price for the customer is approximately PLN 16-21,000. At the same time, the prosumer is dependent on the grid - he does not fully use the energy produced, relies on electricity prices imposed in advance and is cut off from electricity when the grid fails.
In the case of a hybrid PV set 5 kW + Miellec LV-5 + Deye, the retail price is PLN 45,000 net. The cost of the installation is PLN 37,000, of which:
- PLN 4,000 is the price of the Deye hybrid inverter,
- 9.9 thousand PLN price of the Miellec LV-5 energy bank,
- PLN 1,000 additional costs.
The installer's profit from the installation is PLN 8,000, which is PLN 2,000 more than in the case of classic photovoltaics. By increasing the price for the customer by PLN 4,000, he can gain up to PLN 12,000, which is twice as much as for the installation without the hybrid kit.
The price for the customer is around PLN 49,000 gross. The final cost after taking advantage of the available reliefs and subsidies is around PLN 16-21,000. The customer pays the same as in the case of a classic PV installation. At the same time, they increase the self-consumption of the energy produced and gain some energy independence. This translates into benefits over time - a quick return on investment, financial stability and energy security.
Also check out: Mój Prąd 5.0 is enjoying considerable interest! What is worth knowing about the new edition of the program?
Profitability of installing a hybrid kit in the case of an existing PV installation
Let's look at the issue of adding a power bank to an existing PV installation from the perspective of an installer. The sample retail price for a customer of a Miellec LV-5 power bank and a retro-fit hybrid inverter is around PLN 32,000 net. The cost of the installation is around PLN 17,000, of which:
- 4 thousand PLN inverter price,
- 9.9 thousand zlotys bank price,
- PLN 3,000 for assembly and general supplies.
The profit for the installer is approximately PLN 15,000 net.
What does the customer gain? Under the Mój Prąd program, they can receive PLN 18.4-20.4 thousand in subsidies. In addition, they can count on PLN 1.7-6 thousand in refunds from the thermal modernization relief. The final cost of purchasing and installing the kit is PLN 8.6-14.9 thousand. After installing the energy bank, the car's consumption will increase from 25% to about 55%. The customer can also count on greater grid stability and energy security.
Profitability of energy storage – a few words at the end
Buying an energy storage facility is a profitable solution for both installers and end customers. From the perspective of installers, installing hybrid sets can bring them up to twice as much profit than installing a classic photovoltaic installation.
If we add to this the possibility of connecting an energy bank to an existing PV installation, it turns out that the profit for the installer can increase to PLN 15,000 net. This is an exceptionally attractive proposition, especially in comparison to installations without an energy storage.
For typical households, the best choice are small banks with a capacity of 5 kWh, which increase the auto-consumption of the energy produced to about 55%. The customer, choosing a hybrid set, receives energy independence at the same price and fully uses the potential of their home photovoltaic micro-installation. The installer, on the other hand, by proposing a hybrid set to the customer, can count on even 2x greater profit than in the case of a classic installation.
