#258 in Battery chargers & accessories
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Reddit mentions of [2-Pack] Adjustable DC-DC Buck Boost Converter Automatic Wide Voltage Regulator XL6009 DC to DC 5-32 V to 1.25-35 V Voltage Module
Sentiment score: 1
Reddit mentions: 2
We found 2 Reddit mentions of [2-Pack] Adjustable DC-DC Buck Boost Converter Automatic Wide Voltage Regulator XL6009 DC to DC 5-32 V to 1.25-35 V Voltage Module. Here are the top ones.
![[2-Pack] Adjustable DC-DC Buck Boost Converter Automatic Wide Voltage Regulator XL6009 DC to DC 5-32 V to 1.25-35 V Voltage Module](https://m.media-amazon.com/images/I/51eRBoDEXJL._SL300_.jpg)
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Wide input voltage: 5V-32V; Wide Output Voltage: 1.25V-35V；(with automatic step-up and down, within the scope of work, any voltage input can be regulated any voltage output)Model specification：XL6009 step up down Converter moduleWith 4A high efficiency MOSFET switches, the efficiency of XL6009 can be up to 94%With ultra high switch frequency 400KHz , even if small capacity filtering capacitors can achieve very good resultsApplication: Car regulator , solar photovoltaic, wind power and other applications of voltage instability .
Specs:
| Height | 0.6692913379 Inches |
| Length | 2.362204722 Inches |
| Weight | 0.03747858454 Pounds |
| Width | 1.574803148 Inches |
I have done this for my RV's external (and internal) AP and wireless bridge, back when I had very limited power but still wanted my internet to work. :) It worked well, and eliminated the inverter efficiency loss, replacing it with a very small converter efficiency loss.
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First, we need to figure out if your modem and router actually run on 12 volts DC. I have a feeling one or the other might not, especially the modem, frequently they actually use an AC power input. If any use AC, we'll need to rethink our strategy. (Mind you, some weird things use 12 volts AC as input, etc. So double check. :) )
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If they do both run on 12 volts DC (or any DC voltage), you're going to need to get what's called a 'boost/buck' converter, to stabilize the voltage coming from your battery bank. Computer equipment like that will often crash if fed a voltage that's not EXACTLY what it's rated for (12 Volts, or whatever). (Or worse, sometimes it'll fry it if the voltage is a few volts off!)
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You said that each draws about 10 Watts, so you'll need a reasonably sized boost/buck converter, something like this:
https://www.amazon.com/Adjustable-Converter-Automatic-Voltage-Regulator/dp/B07NTXSJHB/ref=sr_1_6?keywords=boost%2Fbuck+converter&qid=1558452900&s=gateway&sr=8-6
You could use one converter for each device, for best results with heat dissipation, etc. And that means you could also measure (and thus exactly match with the converter setting) the original power cord's output voltage, preventing any possibility that the modem or router will hate the new power source. Essentially, you'll just be making a new power cord that accepts the battery voltage (~12 volts) and outputs exactly what the original cord did.
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As far as the outlet is concerned for the cord to connect to the wall or such... how about just using a set of standard 12 volt outlets like in a car? :) Just connect them like you would any other 12-volt appliance (with a fuse, of course) to your battery bank.
https://www.amazon.com/ONLINE-LED-STORE-Automotive-Extension/dp/B00PXAMYTC/
Something like this should do it. Maybe not that one specifically if you have some other requirements, but it should do the job.