Paralleling Generators: Can You Combine Watts?
Connecting dual generators with synchronizing cords to double your total available power.
What is Paralleling?
If you own a 2000-watt generator and you buy a second 2000-watt generator, can you plug them together to get 4000 watts? Yes, but only if they are inverter generators designed to run in parallel.
This process uses a special Parallel Kit (a cord with a bridging box) that connects the two generators, synchronizes their AC sine waves, and combines their output into a single heavy-duty 30-amp or 50-amp outlet.
Why Not Just Buy One Big Generator?
There are three massive advantages to buying two small generators and paralleling them, rather than buying one large one:
- Weight & Portability: A 4000-watt generator weighs over 100 lbs and is hard to lift into a truck. Two 2000-watt generators weigh 45 lbs each and are easily carried by one person.
- Fuel Efficiency & Scalability: If you only need to run a TV and a fridge, you only start one generator, saving fuel. If you need to run the air conditioner, you start the second one and parallel them.
- Redundancy: If one generator breaks down, you still have the other one to provide essential backup power.
The Math: How Watts Combine
When you parallel two identical generators, both their Running Watts and Starting Watts double.
4000W Total Surge / 3200W Total Run.
With a standard parallel kit, this combined power is routed to a 30-Amp RV receptacle (TT-30R) or a twist-lock outlet (L5-30R), allowing you to power heavy loads like a 13,500 BTU RV air conditioner.
Important Rules for Paralleling
- Must be Inverters: You cannot parallel conventional open-frame generators. Only inverter generators have the microprocessors required to synchronize their 60Hz frequency waves. If waves are out of sync, a catastrophic short circuit occurs.
- Must use the same Brand/Model: While it is technically possible to parallel different brands if their inverter architectures are identical, manufacturers strongly recommend only paralleling identical models.
- Never connect without the proper kit: Do not try to make a homemade "suicide cord" to connect two generators. You must use the manufacturer's parallel kit, which contains communication wires for the internal computers.