Homemade Inverter Generator - Version 1.1 - 1500 Watts Power Load Test

This is a rough prototype of my homemade generator. Actually its more like a 2 stage DC/AC system that can be used to charge batteries too. I used a (really old) 7 horsepower Tecumseh engine driving a 145Amp Delco Remy Alternator. I chose a shaft drive versus belt drive. My inverter is a MotorMaster Eliminator branded Xantrex 1750 watt inverter. My load test is about 1530 watts. The governor on the engine was broken (see my version 1.0 video). Now that the engine governor is fixed, the proper output is maintained and now the engine doesn't strain with the load. It works really well. Later I will buy a large deep cycle battery and use it to run the inverter for small loads with the engine and generator used for large loads and/or battery charging. Next things to do are make a steel chassis, and get a much quieter muffler. Sorry for the shaky video, it was -15c outside and I guess I was shivering. Be sure to watch all the videos of this generator.

Category:

Science & Technology

Tags:

• alternator
• generator
• 12vdc
• 110vac
• inverter
• Tecumseh
• H70
• gas
• power
• powered
• 1500
• watts
• hp
• horsepower
• battery
• charger
• delco
• remy
• xantrex
• engine
• motor
• ac
• dc

[NOLIMIT69NOLIMIT2000]

That alternator is not running fast enough. Should use a 6 to 8 inch pulley on the motor and stock pulley on the alternator.

[AlternativePowerMan]

@NOLIMIT69NOLIMIT2000 You're wrong. I have the spec sheet on the alternator's RPM power curve and its working perfectly. The alternator is producing approx 150 amps DC in this video, just as I had planned.

[NOLIMIT69NOLIMIT2000]

@AlternativePowerMan No actually you are wrong. You need to reread your spec sheet. An alternator starts making it's good and peak power around 4000rpm minimum. Peaking between 5000 and 7000rpm depending on the alternator. Most lawnmower engines don't run above 4000rpm unless highly modded with a bunch of new parts. Just look at the pulley your car has to run one. You need at least a 4 or 5 inch to achieve that at WOT on that engine.

[AlternativePowerMan]

@NOLIMIT69NOLIMIT2000 Here ya go jackass, read it yourself. (go to delcoremydotcom /Alternator/Models/24SI-Heavy-­­­Duty-Alternator.aspx) The engine is at 3600 RPM, and its not running WOT either!! Look and you'll see that at 3600 RPM the output is around 135 amps. I ran a load test for 30 minutes (started with a drained battery actually) which proves my math that the thing is making at least 145 amps. Go read more books before you shoot your mouth off. BTW the engine not WOT either.

[AlternativePowerMan]

@NOLIMIT69NOLIMIT2000 Your comment about car pulleys proves how little you know. haha

[frosty9595]

With that low of input voltage I would have to guess your alternator isnt keeping up and the battery is being drained.

[AlternativePowerMan]

@frosty9595 Also if I wanted to, I can hook up a remote sense wire, and measure the voltage at the battery. This could cause the alternator to automatically adjust its output via the feedback mechanisim. If the need arises to do that then I will.

[bmwexer]

Whats your point why not just buy generator

[fredriktaaje]

easy to calculate: Voltage lower than 12,2 Volts is definently not charging the battery...To charge the battery and run the inverter and still have some energy to keep up driving with generator paused for small loads you have to bring up the voltage and amperage.. Look at you car: You will see that 14- 14,4 volts is ideal and drops a little when you run fans and big electrical consumers. Run with a smaller battery and check it out... But nice project :-)

[frosty9595]

@AlternativePowerMan Funny you should ask if im building one. Just uploaded a video of my rough test this morning right before reading your reply. ;-)

[AlternativePowerMan]

@frosty9595 Nope not true. The input voltage is within spec of the inverter so that is really all that matters. It is lower than the typical 14VDC due to the cabling, and this only occurs at full output. Read the notes I posted, this is not what I designed the system for, but did want to test it at its limits to see how it would hold up. I went on your youtube page, because you posted other comments. Seems the best you have to offer is showing us how to start an engine. Build a genny soon? :-)