So you've decided to add battery storage to your solar system — smart move. But before the crew shows up, a lot of homeowners have the same question: where does the battery actually go, and what does the installer need from my house to put it there? Whether you're pairing a FranklinWH aPower, EG4 WallMount, or Sigenergy SigenStor with your existing solar array, the placement and prep work follow a similar pattern. Here's what to expect.
Picking the Right Spot
Most residential batteries end up in one of three places: the garage, an exterior wall, or a dedicated utility closet. Garages are the most common choice in Texas because they're climate-buffered, easy to access for service, and close to the main electrical panel — which keeps wiring runs short and installation costs down. Exterior mounting works too, especially for units like the EG4 WallMount that carry an outdoor-rated enclosure, but your installer will want a shaded, north- or east-facing wall to keep the battery out of direct afternoon sun. Direct summer heat is the enemy of battery longevity, and in Houston or Dallas that heat is no joke.
Your installer will also check a few practical things before committing to a spot: is there enough clearance around the unit for airflow and service access, is the wall structurally able to support the battery's weight, and is it within cable-run distance of both the inverter and the electrical panel. A battery mounted 60 feet from the panel means more conduit, more labor, and more cost — so proximity matters more than most homeowners expect.
What Happens During the Mounting and Wiring Process
Once the spot is confirmed, installation typically follows this sequence. First, the crew mounts a backing plate or bracket to the wall — batteries like the FranklinWH aPower and Sigenergy SigenStor use a wall-hung design that keeps them off the floor, out of reach of minor flooding, and easier to service later. Next comes the DC wiring between the battery and the hybrid inverter, followed by communication cabling (usually a simple CAT5 or proprietary comm cable) so the inverter and battery can talk to each other and coordinate charge/discharge behavior automatically.
After wiring, the installer will connect the battery to the home network — either via Wi-Fi or a hardwired connection — so it can report to the manufacturer's monitoring app. This step matters more than it sounds like it should: without it, you lose visibility into state of charge, backup status, and firmware updates. Finally, the system goes through commissioning, where the installer verifies charge and discharge settings, tests backup transfer if the system includes whole-home or partial-home backup, and confirms everything is communicating properly before calling the job done.
Stackable Systems and Future Expansion
One thing worth asking your installer about up front: can this system grow later? Most modern battery platforms — including the FranklinWH aPower 2 and Sigenergy SigenStor — are designed to be stackable, meaning additional battery modules can be added to the same bracket or bus bar down the line without ripping out what's already installed. If there's a chance you'll want more backup capacity in a year or two, it's worth confirming your installer is leaving room — literally, on the wall — for that expansion, and that your inverter's battery bus can handle the added capacity.
Questions to Ask Before Install Day
A few questions can save you a headache later. Ask whether the mounting location is covered under the manufacturer's warranty terms (some warranties specify temperature or exposure limits). Ask how the installer plans to route conduit — through the attic, along an exterior wall, or through the slab — since this affects both cost and how much patching or paint touch-up you'll need afterward. And ask what happens if the Wi-Fi connection fails during commissioning; a good installer will have a backup plan, like a hardwired ethernet drop, rather than leaving your monitoring dark.
Solwel Is Here to Help
At Solwel, we stock hybrid inverters and battery storage systems from FranklinWH, EG4, Sigenergy, and more — with fast fulfillment out of our Houston (4620 S Sam Houston Pkwy W, STE 450) and Dallas (350 S Belt Line Rd, STE 108) warehouses. If you're speccing a system and want help thinking through mounting location, stacking for future expansion, or which battery pairs best with your inverter, give us a call at (346) 432-4228 — we talk through these installs with contractors every day.
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