Router Battery Backup

The 15V PoE output on my Ratel 860P is just over 16V so there's a chance it may fall within the minimum voltage spec of the 19V Asus router. I couldn't find the DC voltage ranges for the AC86U online.

Alternatively one could switch the PoE port on the Ratel to 24V and use a custom wired ethernet jack and a few 1N5400 diodes (3A) wired in series to drop the voltage to 19V.

If one wants to get more efficient (>90%) then a DC-DC buck step down converter based on something like the LM2596 should do the trick.
 

Mini DC UPS (16500mAh) Backup Battery Power Bank Supply (44.4Wh)​

www.geewiz.co.za

Mini DC UPS (12000mAh) Backup Battery Power Bank Supply (44.4Wh) - 12V Router, CCTV, Wifi Backup

Backup power for ANY 12V appliance Lasts approximately 5 HOURS on backup power Input:12V 2000mA Output:12V 2000mA
www.geewiz.co.za www.geewiz.co.za
I'm doing a endurance run with this battery backup and, with my router & ONT drawing 1.8A max, the unit is still showing a green indicator 6h45m in. It should theoretically get to 9 hours; I'll test that another day.
 
Has anyone connected a solar panel to Ratel 860P - comments please.

They're switching off the power on Friday Easter weekend from 9:00am to 17:00 (hahaha - it always trips when they switch on so will probably not have electricity on Saturday either).

Also when connecting the solar panel is it just a cable? I'm thinking of using it now and again, not permanently so want to place the panel outside and plug in when needed - or is that a silly idea :)
 
maumau said:
Has anyone connected a solar panel to Ratel 860P - comments please.

They're switching off the power on Friday Easter weekend from 9:00am to 17:00 (hahaha - it always trips when they switch on so will probably not have electricity on Saturday either).

Also when connecting the solar panel is it just a cable? I'm thinking of using it now and again, not permanently so want to place the panel outside and plug in when needed - or is that a silly idea :)
Click to expand...
Nothing wrong with only connecting the solar from time to time. A simple electrical cable should do. Try stay to the same cable thickness as the cable attached to the panel.
 
Last edited:
Speedster said:
Nothing reason with only connecting the solar from time to time. A simple electrical cable should do. Try stay to the same cable thickness as the cable attached to the panel.
Click to expand...

Thanks so much @Speedster :)

Ratel 860P takes a panel up to 50W so it's small enough to move around.
 
PsyWulf said:
Cctv does this with a 1-4 DC splitter cable,no special sauce required
Click to expand...
Had a look at some now and I guess they could work. I'm looking for a nicely packaged one though as I want to replace the growing collection of power bricks on my desk.
 
Speedster said:
Had a look at some now and I guess they could work. I'm looking for a nicely packaged one though as I want to replace the growing collection of power bricks on my desk.
Click to expand...
Strip one of those 12V Alarm/CCTV Backup power supplies for the DC board perhaps
 
Speedster said:
Just bumping this question. Anyone seen something along these lines?
Click to expand...
I think Mantech has stuff like this.

Products

Mantech Electronics is an Electronic Component, Test and Measurement, Tool and Power Product Importer, Supplier and Distributor. Products are available from any one of our branches and distributors in JHB, DBN and CPT. We are committed to helping you succeed.!
www.mantech.co.za
 
furpile said:
I think Mantech has stuff like this.

Products

Mantech Electronics is an Electronic Component, Test and Measurement, Tool and Power Product Importer, Supplier and Distributor. Products are available from any one of our branches and distributors in JHB, DBN and CPT. We are committed to helping you succeed.!
www.mantech.co.za
Click to expand...
Thanks. I think I'm going to keep my eyes open for someone who fried their Gizzu / Ratel / UltraLan batteries and use one of those
 
maxer100 said:
Hi Guys

So I'm looking to power the following for at least 2 hours , preferably more for breathing room.
Asus Router + ONT18 W / 12 V / 1.5A
Access point12V 1A
Access point12V 1A
Raspberry Pi 4b5v 3amp 6.4w

The Raspberry Pi would be nice to have powered as well, but can be tricky to find a device for 5v and 3amp.
Click to expand...

The LM2596 is 3-amp rated and you can find modules on eBay for about R 25.

I have a 15-watt setup like this with at least 6-8 hours runtime off an old car battery.

The input is a 19V laptop power supply (~ 70W max). The charging circuit is managed by an Arduino (which itself hangs off the Raspberry Pi). The battery and laptop supply are connected in a simple "diode-or" configuration. The output is a couple of boost-buck modules for 12V and an LM2596-based buck module for 5V. Each module is just a "channel" connected in parallel.

Lead-acid needs to be oversized vs. li-ion but it's still the more economical option for stationary applications like this, imo. I suspect the main reason 18650s are standard in all the Chinese products is simply because they're cheaper to ship.
 
Thanks @Tomtomtom

I ended up going with a ratel860p. Still need to sort out the power for the PI but have the rest of the devices covered.

Very happy with the Ratel, gave me 5hours on the router/ont and only dropped to 50% power.
 
maxer100 said:
Thanks @Tomtomtom

I ended up going with a ratel860p. Still need to sort out the power for the PI but have the rest of the devices covered.

Very happy with the Ratel, gave me 5hours on the router/ont and only dropped to 50% power.
Click to expand...

I also need to Power my Pi.

Would a regular 5V3A powerbank work?

Like this.

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MidnightZA said:
I also need to Power my Pi.

Would a regular 5V3A powerbank work?

Like this.

Takealot.com: Online Shopping | SA's leading online store

South Africa's leading online store. Fast, reliable delivery to your door. Many ways to pay. Shop anything you can imagine: TVs, laptops, cellphones, kitchen appliances, toys, books, beauty & more. Shop the mobile app anytime, anywhere.
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Click to expand...

Could work. But it's not the intended application so you'd have to test and see.

If the Pi draws 5 W then a 10000 mAh powerbank (rated at 3.7 V) should give over 7 hours.

The question is will the powerbank controller chip handle charging at the same time? Otherwise it's going to be a one-shot thing. And can it charge fast enough? It needs to accept more than the Pi consumption of ~5 W (i.e. > 1 A at 5 V) or it will never recharge with the Pi connected.

For various reasons e.g. thermal constraints the controller might not do what you want even if it looks like it should be possible from the spec.
 
Tomtomtom said:
Could work. But it's not the intended application so you'd have to test and see.

If the Pi draws 5 W then a 10000 mAh powerbank (rated at 3.7 V) should give over 7 hours.

The question is will the powerbank controller chip handle charging at the same time? Otherwise it's going to be a one-shot thing. And can it charge fast enough? It needs to accept more than the Pi consumption of ~5 W (i.e. > 1 A at 5 V) or it will never recharge with the Pi connected.

For various reasons e.g. thermal constraints the controller might not do what you want even if it looks like it should be possible from the spec.
Click to expand...
It’s probably worth a shot though - a power bank is always useful to have lying around even if it doesn’t work for that.
 
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