24-36 volt power station charging using abandoned air compressor wiring

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One of the biggest issue using power station on the roads are the slow charging. At 12 volts the charging are limited to 8A for Ecoflow Delta 2. Solar panel are not that effective if you need to charge at night.

Ecoflow release an alternator charger that can charge at 800 Watt but it cost $600.
Tinkerer Adventure use Victren that are about $140-160 and very good option.
.

This is another option that is also very good.

On GX470, most abandoned the air suspension. This circuit are rated for 50 amps. My cheap solution is:
1. Use air compressor circuit.
2. Use 110 volt inverter button to control this. Done by jumping the signal from inverter relay to air suspension relay.
3. Use a cheap waterproof 12 volt to 24 volt. https://a.co/d/4F2S2Om
4. Install it where the old compressor used to be.
5. Wire a XT60i cable or Universal Solar Panel Connector to be able to charge it at higher amp. I would buy something around 10' to be more flexible.
This is what I use but found it a bit too short and specific to ecoflow. Not all power station use this kind of connector.
https://a.co/d/5NEonvh
6. Air compressor connector
90980−10989 Male.
7. 12 AWG waterproof quick connector for connecting XT60i cable to the charger. https://a.co/d/62Xsu6x.

Using this I was able to charge minimum 350W at idle.

This document courtesy of Stephen S downloaded from GXOR files section explain how to reuse air compressor circuit.
 

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This is how I trigger air suspension relay. Need to jump 12V signal from
Inverter relay to activate air suspension relay. I bent the trigger pin of air suspension relay and connect it to the 12 volt trigger of inverter relay. This way when I turn on inverter swich from inside cabin, it would also activate this circuit.
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This is how I run the output from 24 Volt converter inside the cabin.
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12 Volt to 24 Volt converter installed outside, where the old air suspension compressor used to be.
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FB_IMG_1721859984180.jpg
 
My Ecoflow Delta 2 got max 15 Amp and 11-60 volt. I been reliably charging 358 watts. I found this is limited to the 15 Amp Ecoflow software set the limit.

I found on eBay similar step up converter that up the voltage to 36 volts. That would charge at the max 500 watt from the software limit ecoflow set. 15 Amp X 36 Volt = 540 Watt max from the converter.

Not bad for $25.
Screenshot_20241008_095826_eBay.jpg
Screenshot_20241008_095815_eBay.jpg


Screenshot_20241008_095815_eBay.jpg


Screenshot_20241008_095826_eBay.jpg
 
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