Supporting Multiple Appliances with One Backup Power Solution
Ensuring emergency backup power for all your critical appliances—not just one—is a significant advantage. It enables staff to concentrate on essential tasks when power is out.
Many clients wonder how many appliances—whether small or large—their single battery backup generator can support at once. While a single system might seem like an efficient way to save time, space, and money, that’s not always the case.
Just because your system has many AC outlets doesn’t mean it can power all of them at the same time. The true limit lies in the inverter’s total wattage capacity.
How Inverters Determine Generator Output
An inverter converts DC power from the batteries into AC power for appliances, and its output is measured in watts. Every appliance requires a specific amount of watts to operate.
Because an inverter can only supply power up to its rated capacity, overloading it can cause the system to fail or shut down during an outage. That’s why each EverSafe system is custom-engineered to provide sufficient capacity for your specified appliances—rather than simply offering more outlets.
How to Select the Right Backup Generator Size
The number of appliances a single system can support varies depending on your unique requirements. Key considerations include:
- Startup Wattage of each appliance
- Desired Backup Duration
- Energy Efficiency of the appliances
- Number of AC Outlets on your backup system (if applicable)
Specialized equipment, like ultra-low-temperature freezers, draws substantial power compared to smaller items like surgical tools.
Medical Cold Storage Considerations
Standard refrigerators or freezers typically run their compressors roughly 30% of the time (about 7.2 hours per day), whereas ultra-low-temperature freezers run over 80% of the time (more than 19 hours daily). Since startup wattage can double the normal running load—and systems are custom-sized—your system may not accommodate extra appliances during an outage.
If you require more backup support, you have three options:
- Upgrade to a Larger System to manage additional appliances
- Install Separate Systems—one for each added appliance
- Use More Efficient Appliances that demand less power and may work with your existing EverSafe system
Often, the latter two options offer better cost-effectiveness and practicality.
Operating Rooms and Backup Power
In surgical or operating settings, multiple appliances often run simultaneously. Devices like lights, monitors, and surgical tools typically draw power in short bursts and are highly energy-efficient, meaning a modest backup system can handle them.
Even larger items, such as surgical tables, may not overburden the system if used intermittently while other high-draw equipment is off. EverSafe designs systems based on realistic usage patterns, adding a buffer to ensure readiness for extreme demands—so you only pay for the power you need, with a safety margin included.
Can I Use All AC Outlets on My Generator?
Standalone and mobile EverSafe units come with 4 and 8 grounded, 3-prong AC wall outlets, respectively. However, the total number of outlets doesn’t guarantee that you can run that many appliances—that depends on proper system sizing.
Hardwired models don’t include built-in outlets; they connect directly to a building’s electrical system. If outlet availability is important to you, let your sales representative know—you may be eligible for a more customized solution.
Need Help with Add-On Appliances?
If you’d like assistance determining whether your EverSafe system can support additional appliances, contact EverSafe Technical Support at 1.800.765.3237, Monday through Friday from 8:30 am to 5:00 pm (EST).
Find the Right System for Your Needs
Every EverSafe system is tailored to match customers’ power requirements and form factors. The most efficient way to select your ideal solution is to reach out directly.
For quotes or to discuss alarms and accessory options, contact our product experts, engineers, or sales team:
Phone: 1.800.765.3237
Hours: Monday–Friday, 8:30 am–5:00 pm (EST)
