Scott Aerator Solar Back-up Battery Module | 48V Battery Backup for Solar Pond Aerators | 3-Day Runtime

Solar aerators work great during daylight. The question most buyers eventually ask is: what happens at night? Or during a three-day storm in November? The Back-up Battery Module answers that. It adds a 48-volt battery bank — four 120 Ah AGM batteries — to your Scott solar subsurface aeration system, extending operation through the hours when the panels aren't generating power. In good conditions with a fully charged bank, you get up to three days of continuous runtime without sun. Scott uses four batteries where most competitors use two. More capacity means the batteries don't cycle as deeply on a typical overnight discharge, which means longer service life and more reliable operation when you need it most — the three-day cloudy stretch in late fall when winterkill risk is highest. The control section includes an MPPT charge controller with Bluetooth monitoring, a programmable digital timer, and automatic fan ventilation. The timer lets you schedule run windows — useful if you want to run the aerator overnight but not 24/7. The MPPT controller captures more usable energy than a fixed-voltage charge controller. One thing to understand before purchasing: this module requires two solar panels to generate enough power to recharge the batteries. If you're adding it to a Standard subsurface system (single panel), your purchase will include a second panel. If you already have an XL system (two panels), the battery module adds directly without a panel upgrade. The enclosure is all-welded laser-cut steel with a powder-coated finish, stainless steel hardware, and locking hasps. NEMA-rated for outdoor exposure. The air intake uses a magnetic louver that pulls off without tools for cleaning. If you're adding this module to an existing Scott solar aerator please call before ordering to review your existing system.  What's included: Enclosure, 4 AGM deep-cycle batteries (120 Ah each), all cables and connectors, MPPT charge controller, smart controller with digital timer, low-voltage disconnect, full instructions, complete tech support access. Key Features Up to 3 days without sun — four 120 Ah AGM batteries at 48V keep your aerator running through nights, storms, and cloudy stretches Requires two solar panels — adding this to a Standard (single-panel) subsurface system upgrades it to a two-panel configuration; panels are included if needed MPPT charge controller with Bluetooth — monitors and manages charging efficiency; accessible via Bluetooth for status checks Digital programmable timer — schedule daily run times; run continuously overnight or set specific windows to extend battery life Automatic ventilation with high-temp protection — 78 CFM fan activates automatically; system shuts down and restarts if temperature limits are hit Low-voltage disconnect with auto-reconnect — protects batteries from over-discharge; reconnects automatically when charge recovers Four AGM batteries — not two — double the capacity means longer runtime and less cycling stress on each cell Optional slow-start controller — gradually powers up your system over two weeks on first start; reduces shock to fish in sensitive ponds Welded powder-coated steel enclosure — stainless steel hardware, locking hasps, NEMA 3R/4X/12 rated; built for outdoor use Tool-free magnetic air intake louver — remove, clean, and reinstall in seconds; no tools required Specifications Power & Electrical Batteries: Four 120 Ah AGM deep-cycle System voltage: 48V Charge controller: MPPT with Bluetooth Circuit protection: Individual thermal-magnetic breakers Low-voltage protection: Automatic disconnect and reconnect Run time scheduling: Programmable digital time clock Thermal Management High-temp limit: Yes, with automatic restart Low-temp limit: Yes, battery freeze protection with automatic restart External alarm outputs: Normally open dry contacts Enclosure Construction: All-welded laser-cut steel Finish: Baked-on powder coat Hardware: Stainless steel NEMA rating: 3R / 4X / 12 Weight: 120 lbs (without batteries) Dimensions: 22" wide x 22.5" deep x 30" high Assembly & Documentation Back-up Battery Module Specs & Assembly (PDF)