The Nelpuni approach
A good decision starts with what you need.
We help you understand how much battery capacity you need, which options are worth comparing and what to check before buying. The numbers are part of the answer, not a promise of compatibility.
Calculate my needs →From your needs to a decision
- 01
First, how you use it
Choose your appliances, how long you use them and how many days you need. You can adjust the assumptions and review the calculation.
- 02
Next, the limits
We assess energy, power and connections separately. Solar panels need their own checks; they are not included by default.
- 03
Finally, the purchase
Review the candidates and outstanding checks. At the retailer, confirm the exact variant, included accessories, final price and availability.
How to read a result
Read each status alongside the dimension and conditions it refers to. No result replaces the manufacturer's instructions.
- Fits
- The dimension assessed meets your stated requirements. Check the others too: enough battery capacity does not establish that a socket or solar panel is compatible.
- May fit — checks outstanding
- An option is worth considering, but a fact or condition still needs confirmation. We show you what to check before buying.
- Does not fit
- A requirement exceeds a known limit. More battery capacity alone cannot solve insufficient power or an incompatible connection.
- Insufficient information
- We do not have enough information to reach a conclusion. An unknown value counts as neither a pass nor zero.
The evidence is yours to check
Product pages link to sources and distinguish documented facts from outstanding checks. We have not physically tested this equipment.
What documented, pending and tested mean
Documented means a field has an identified source for the stated model and region. It does not automatically verify the rest of the specification, the price or your appliances.
Verified refers only to the accompanying field, source and date. It is not a certification of the whole product or a guarantee of compatibility.
Pending means evidence is insufficient or a contradiction remains unresolved. Tested would require our own physical test with a documented method and result; we do not use that term for reading manuals.
Sources, variants, dates and contradictions
We prioritise manuals and official documentation, identifying the model and region. We do not replace a European 230 V model's specifications with those of a different market variant.
The review date records when evidence was checked, not when the product launched or whether an offer is still valid. We preserve discrepancies between sources rather than silently choosing the most favourable figure.
The assumptions behind the calculations
Energy depends on power, hours of use and days. Estimates include visible assumptions for losses, inverter consumption and reserve. Start-up demand and port limits are assessed separately where data is available.
Solar generation depends on the panels, sunlight and estimated losses. A rated output does not guarantee that production throughout the day. Check voltage, current, connectors and configuration before connecting.
The solar voltage correction for cold weather does not check every temperature limit of the power station. Review the charging and discharging conditions of the model separately.
We do not certify medical power continuity or electrical installations. Those uses still require checks of the actual equipment and its specific requirements.
What AI does and what needs review
We use AI assistance in development and in preparing documentary analyses. The calculator applies programmed rules and formulas; it does not generate results through an AI conversation.
An AI response is neither a manufacturer source nor a physical test. Changes need evidence checks and review before publication. We do not claim to monitor prices or all sources continuously.
Who is behind Nelpuni and how it is funded
Nelpuni Energy is Nelpuni's first specialist area. You can contact the project at nelpuni.contact@gmail.com. The final legal identification is still pending, as stated in the project information. We do not claim an expert team or in-house tests without evidence.
Affiliate links are identified next to offers. A qualifying purchase may earn a commission at no extra cost to you. Commission does not determine suitability; old or unverified prices cannot establish a best-value option.