System selection
Find the right backup system.
Start with your real loads, then narrow the battery and inverter. Each step carries your result forward, so you never enter the same information twice.
One decision, three connected steps
The calculator determines the requirement. The two finders explain product fit and compatibility.
Backup calculator
Select the loads that must stay on and the expected outage duration.
Choose a battery
Match the calculated capacity to installation, stock and expansion needs.
Choose a hybrid inverter
Confirm phase, peak demand, PV input and generator requirements.
How recommendations are made
A transparent pre-selection, not a black box.
The first two calculations come from electrical fundamentals. Product matching then uses current data sheets. Site design and local compliance require a qualified engineer or installer.
Energy requirement
Appliance power × operating time, adjusted for efficiency and reserve.
Peak power
Simultaneous running load plus the largest expected startup demand.
Battery fit
Required kWh, discharge current, installation, local stock and preferred 10.24 kWh path.
Inverter fit
Continuous power, phase, PV input, generator input and battery current capability.
Learn before you decide
Guides, definitions and direct answers.
Use these resources when you need the reasoning behind a specification or a practical answer before requesting a quote.
Blog
Practical articles on sizing, installation, products and energy-storage buying decisions.
Read the blog → ReferenceEnergy storage glossary
Plain-language definitions of battery, inverter, solar and commercial-storage terms.
Browse the glossary → AnswersFAQ
Direct answers about products, delivery, local stock, partnership and project support.
Read the FAQ →Selection FAQ
Questions before you rely on the result.
Short answers about inputs, current limits and when engineering review is required.
What should I prepare before using the selectors?
Start with the calculator result: required energy in kWh and peak demand in kW. Also confirm grid phase, planned PV power, installation location and whether local stock is the priority.
Is the recommended battery and inverter a final system design?
No. It is a preliminary product path. An engineer must confirm battery voltage, continuous charge and discharge current, BMS protocol, inverter data sheets, cables and protective devices before the quote.
Why can a battery have enough kWh but still be unsuitable?
kWh describes stored energy. The inverter also requires enough battery-side current at full output. If the battery's maximum continuous discharge current is too low, the selector sends the project for engineering review.
When does the automatic selection stop?
Manual review is triggered for requirements above the 17.41 kWh automatic home range, peak demand above 8 kW, three-phase supply, planned PV above 10 kW, incompatible battery current, rack installation or protected outdoor installation.
Does the selector prioritize stock in Ukraine?
When you choose “Ukraine stock first,” the selector first looks for an in-stock model that meets the capacity requirement. If none fits, it returns to the full home range. Without this priority, the 10.24 kWh path is favored when it fits.
Engineer-confirmed selection
Have a load list or calculator result?
Send the required kWh, peak kW, phase, planned PV and installation conditions. We will confirm the battery, inverter, BMS communication and system limits before the quote.
Step 2 · Product fit
Choose a battery.
Use the capacity from the backup calculator, then confirm how and where the battery will be installed.
ES-BOX34 PLUS
- Final compatibility is checked against the selected inverter.
Step 3 · Compatibility
Choose a hybrid inverter.
Use the peak demand from the calculator and confirm phase, PV and generator requirements.
5.5 kW hybrid inverter
- The quote confirms battery communication and permitted charging current.
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