Terms of Use

Watt48 is a free planning tool. It estimates the battery capacity, continuous output, and startup surge a set of devices needs, and compares those requirements with published power station specifications. You don’t need an account, there’s nothing to pay, and Watt48 doesn’t sell power stations or any other products.

Results are estimates for planning. They rely on typical device wattages, the run times you enter, and documented assumptions about inverter losses, usable battery capacity, and temperature, all described in the methodology on the results page. Real-world runtime varies with each device’s actual draw, the battery’s age, the weather, and how the equipment is used.

Before you buy or rely on a power station:

• confirm its specifications with the manufacturer;
• check the wattage on your own devices’ labels or in their manuals;
• don’t rely on an estimate alone for medical equipment, such as a CPAP machine, or for anything where losing power could put someone’s health or safety at risk. Confirm the power needs with the equipment’s manufacturer or your healthcare provider, and keep a backup plan.

Watt48 offers general information, not professional electrical advice. Follow the manufacturer’s instructions for every power station and device. Connecting any power source to a home’s electrical system should be done only by a licensed electrician using approved equipment.

Product specifications, photos, and prices come from the public GalaxyAX/power-station dataset. Watt48 refreshes its copy regularly, but the information may be incomplete, out of date, or wrong.

Prices are shown in US dollars, can change at any time, and aren’t an offer to sell. Watt48 isn’t a seller: any purchase is between you and the seller you choose, on that seller’s terms.

Watt48 links to manufacturers’ websites and other third-party sites. We don’t control those sites and aren’t responsible for their content, products, prices, or practices. Their own terms and privacy policies apply when you visit them.

Use the site lawfully and in a way that doesn’t interfere with it. In particular, don’t:

• try to disrupt, overload, or gain unauthorized access to the site or the systems it runs on;
• use automated tools in a way that puts an unreasonable load on the site;
• use the site to break any law.

The Watt48 name and logo, the site’s design, and its original text and illustrations belong to Watt48. You’re welcome to link to any page. Product names, brands, and product photos belong to their respective owners and appear only to identify the products.

Watt48 is provided “as is” and “as available”, without warranties of any kind, whether express or implied, including warranties of accuracy, merchantability, fitness for a particular purpose, and non-infringement, to the fullest extent the law allows. We don’t promise that the site will always be available or error-free, or that a recommended power station will meet your needs.

To the fullest extent the law allows, Watt48 isn’t liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss that comes from using the site or relying on its estimates, including buying a power station that doesn’t meet your needs.

Some places don’t allow these limits, so they may not fully apply to you. Nothing in these terms limits rights you have by law that can’t be waived.

The Privacy Policy and Cookie Policy explain how the site handles information. In short: no accounts, no cookies, and no personal information collected.

We may change, suspend, or discontinue any part of the site at any time. We may also update these terms; the date at the top shows when they last changed, and using the site after an update means you accept the new version.