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Building my first electric Drain Jetter

962 Views 13 Replies 4 Participants Last post by  57Chevy
Hello, so I wanted some different opinions and views on my project

I work in drainage, I have a petrol drain jetter can pack on my van. Current spec is a Honda GX630 petrol engine/ Interpump ws202 (200bar/21litres per minute)

I want to build A new drain jetter/pressure washer but with lithium ion batteries.

can anybody help advise me on the most suited BDLC motor and battery’s required.

so far I have found a 15kw bdlc motor that can be run with 72vdc.
The batteris supplying the motor will be from victron energy Google (HE lithium ion 25.6v 200ah)
I was looking at purchasing 3 batteries (25.6v and 200ah each) but connected in a parallel/series. These 3 batts would provide me with 15kwh (5kwh x 3)

do I need to compare the NM torque of Honda to specify the bdlc motor im looking at (golden Motor/EVMotorsport) are the two websites selling what seems to be suitable alternatives?

really appreciate if anyone can reply their views and if I’M on the right page.

A company called RIONED in Holland have built an electric drain jetter that has 6x 25.6v 209ah batteries in a series and it lasts all day. I only need something to last 4hours a day. And they have given no spec on the Motor they use.

tney are charging £80k plus for there machjne. The HE 25.6v 200v batteries are 3.7k each so I know it’s going to be expensive but I’m confident I can buiof for significantly less.
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The batteris supplying the motor will be from victron energy Google (HE lithium ion 25.6v 200ah)
I was looking at purchasing 3 batteries (25.6v and 200ah each) but connected in a parallel/series. These 3 batts would provide me with 15kwh (5kwh x 3)
I'm not sure what "connected in a parallel/series" was intended to mean, but if you have enough modules you can connect them in a combination of parallel and series, but with only three they're either all in parallel (combining for 25.6 V and 600 Ah) or all in series (combining for 76.8 V and 600 Ah). The total energy is the same either way.

Presumably all would be connected in series.
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do I need to compare the NM torque of Honda to specify the bdlc motor im looking at...
No. You only need to match the power of the Honda at the speed it is operated with the power of the electric motor, and choose gearing (or belt drive) to put the motor at a speed suitable for it. If the electric motor runs at a different speed from the Honda engine, it will be producing a different amount of torque. Which is essentially what remy_martian has posted.
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