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Residential Backup Power

What is standby (backup) generator?


A standby generator is a back-up electrical system that operates automatically. Within seconds of a mains power outage an automatic transfer switch senses the power loss, commands the generator to start and then transfers the electrical load to the generator. The standby generator begins supplying power to the circuits. After mains power returns, the automatic transfer switch transfers the electrical load back to the utility and signals the standby generator to shut off. It then returns to standby mode where it awaits the next outage. To ensure a proper response to an outage, a standby generator runs weekly self-tests.

What Size Generator Do I Need to Power My House / Residential During an Outage?


There are three tips to help you calculate the exact size (KVA) generator you need.

Step 1: Make a list of all the appliances you need powered in the event of a power outage

Step 2: Determine the starting and running KVA of each appliance on the list. Starting KVA of an appliance refers to how much electricity it needs at start up. Starting KVA is typically 2 to 3 times the KVA it uses when it’s running continuously.

Step 3: Add up the total KVA needed and base the generator size you need on this number.

Do you have any suited size standby diesel generator to recommend for my house or appliances?

Recommend 1: Power necessary household appliances. Such as light, air conditioning, fans, water heater, refrigerator/freezer, TV, microwave oven. WALT Power’s 7 kVA air-cooled silent diesel generator can meet your above demands. It installed 16 liters fuel tank can continuous working 8 to 10 hours (depends on load). Connect our remote controller, you don’t need go outside to start the generator, especially in a raining day or cold night. Just press the button, it will start running immediately and power to your home appliances.

Another situation that is power outage while you not at home. Some necessary keep power’s appliances will be affected, such as refrigerator/freezer. You could install our automatic transfer switch (ATS) for the generator. It will automatically management Mains and Genset power. When Mains not available, ATS will start the generator and power to your house. When Mains come, it will automatic stop the generator and transfer to mains power connect.

Recommend 2: Power the whole house or residential. The house actually will require the capacity around 10% to 20% power more than your electricity calculated/installed. Such as you have to consider between 30kVA to 33 kVA power when the capacity which is already installed 26 to 28 kVA.


WALT Power’s standby 33kVA WGP-33S residential backup diesel generator is a cost-effective model, which can meet your power demands for small and middle size house. It powered by water cooled engine, 24 hours running capacity fuel tank. Super quiet-fully enclosed soundproof canopy.

Need helps? CALL 0086-18717996108 or send your requirements to sales@waltpower.com to get further reply.

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