Affiliate disclosure

BackupSizer is reader-supported. Some outbound links are affiliate or referral links: if you click one and then buy a product or request installer quotes, the vendor pays this site a commission. You never pay more because of it.

The complete list of relationships (current or pending approval):

• Battery systems — EcoFlow, Bluetti, and Anker SOLIX affiliate programs (typically 5-10% of sale).
• Installer quotes — EnergySage (battery installations) and Networx referral programs, paid per referral or lead.
• Retail — Home Depot and Lowe's affiliate programs on portable generators and accessories.

Worth stating plainly: there is no Generac, Kohler, Cummins, or Tesla affiliate program for publishers. When this site recommends a standby generator or a Powerwall — which the calculator does constantly — nobody pays us anything. That asymmetry is the strongest evidence we can offer that the math drives the recommendations, not the commissions.

Every monetized link on this site carries rel="sponsored" markup, and every page containing one displays a disclosure line. The sizing logic is documented on the methodology page and runs entirely in your browser — no link changes its output.