For auxiliary and backup power. Batteries from several manufacturers available. Call with requirements

The BatteryMINDer® from VDC Electronics is a 3-mode charger/maintainer/conditioner that extends performance and life  of all types and sizes of 12 Volt lead acid batteries while automatically dissolves harmful power-robbing sulphation using safe, U.S.  patented high-frequency pulse technology. These include  maintenance-free, marine, deep cycle, sealed, gel, and all popular brands of  AGM dry-type, valve-regulated batteries, such as those made by Interstate, Exide, Optima  and Odyssey.
VDC also offers Solar Panel controllers.

Deltron Battery Tender - Battery Tender battery chargers are designed to fully and automatically charge and maintain a wide range of styles of lead acid batteries in a 4-step sequence that avoids the potential damaging effects that can be caused by most trickle chargers. Float mode at end of charge cycle.