1. **Check the "Battery" Icon**: If the UPS battery is not holding a charge or is weak, there may be an icon indicating low battery or a warning light.
2. **Run a Self-Test**: Most APC UPS systems allow you to perform a self-test by holding down the power button or using management software. If the UPS fails the self-test, it could be an indication that the battery or internal circuits are faulty.
3. **Check Load Indicators**: UPS systems typically show the load they're carrying (often shown as a bar or percentage). Make sure the load isn’t too high. Overloading the UPS can reduce its lifespan and performance.
4. **Check Battery Age**: UPS batteries typically last around 3-5 years. If your unit is older than that, the battery may need replacement, even if it hasn’t shown warning lights yet.
5. **Check for Audible Alarms**: A failing UPS might beep frequently, especially when the power goes out, indicating a problem with the battery or internal components.
You can try running a test by unplugging the UPS from the wall while it is powering devices. If the devices shut off, it's a strong indicator that the battery might be bad.
For a house and office of that size, you'll likely need a whole-house generator. Here are some options:
1. **Generac Guardian Series**: These generators are popular for home use and come in various sizes. A 22-24 kW model should be sufficient for your needs.
2. **Kohler Residential Generators**: Known for their reliability and long lifespan. A 20-24 kW model would likely be appropriate.
3. **Cummins QuietConnect Series**: These are known for being quiet and efficient. A model in the 20-25 kW range would work well.
4. **Briggs & Stratton**: They offer a range of reliable home generators. Look for a 20-25 kW model for adequate coverage.
You'll also need a transfer switch to connect the generator to your home’s electrical system. It's best to consult with a professional to determine the exact size and type of generator you need based on your power usage.