Remove the gas-powered motor from your tractor. Replace with an electric-powered motor. The type of motor you choose will depend on your power needs. For instance, if you are using the tractor simply to mow the lawn, then you don't need an engine that supports much horsepower. For larger jobs, you're going to want an engine that supports at least 10 to 15 horsepower.
Fabricate a tray on the tractor for your motor's battery. The battery tray can be fitted to the back of the tractor for easier access and battery charging. The tray should be able to hold whatever size battery you need, based upon the amount of horsepower you're looking to generate, as well as the amount of time you can conceivably devote to allowing your tractor battery to charge. Make sure the battery will be securely protected with a cover.
Install the battery in the battery tray. Connect your battery to the engine, and be sure all moving parts -- such as wheels, axles and hydraulic lifts -- are properly connected to receive power from the battery and engine. Your engine is now ready for testing in a safe, secure area where no people or property could be potentially harmed.
Ensure the battery is properly charged. When you consider that electric batteries for vehicles sometimes take up to 24 hours to fully charge, you won't need as much time to charge a tractor battery -- unless your tractor is heavy-duty. Still, it's important to know the charge time for your battery, as this will have to be factored into your schedule, especially if you're using the tractor for a business.
Test out your electric-powered tractor. Make sure the parts work properly, and determine how long you can use your tractor before the battery needs another charge. If all goes well, you can now enjoy doing the same type of work without the extra costs of fossil fuel and the added damage to the environment.