Author Topic: Replaced Davis wall-warts with Tripp-Lite 21A USB Charging Station  (Read 490 times)

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Offline miraculon

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I received a Tripp-Lite Charging station with 10 USB ports. I have been running two meteohubs and a netatmo for a few days now without issue.

I just got my shipment of Davis 6627 USB power cables from Scaled Instruments.

In addition to the meteohubs and netatmo, I am running the following Davis receivers:

2 VP2 Consoles
1 VUE Console
1 Envoy 8x
1 Envoy

At first, the LED back-light kept going out on the VP2 displays. I did the usual connector wiggling, contact cleaner, etc. and they are staying on OK. I don't know what it was, but all five units are running off the charging station just fine. This is in addition to the mh/netatmo.

The only other comment is that the USB power cable seems larger and didn't want to route through the three pegs and the slot in the battery cover. I just plugged it in without routing the cable through those features. I don't think that there will be any problem without the extra strain relief.

The station can provide a total of 21A, 2.1A per port.

This has freed up several 110V AC outlets, which was my original objective.

So far, so good.

I checked each port with it's "customer" with one of those plug in USB volt/amp meters with the ports built in. Each is drawing an expected amount of current. The consoles were easy to confirm, because the backlight won't stay on if it is running on battery, but for the Envoys, the meter was just the ticket.

I'll report any anomalies, but I expect it to "just work".

Here is a pic of the charging station:



Greg H.


Blitzortung Stations #706 and #1682
CoCoRaHS: MI-PI-1
CWOP: CW4114 and KE8DAF-13
WU: KMIROGER7
Amateur Radio Callsign: KE8DAF

Offline sho23

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Re: Replaced Davis wall-warts with Tripp-Lite 21A USB Charging Station
« Reply #1 on: June 06, 2019, 07:27:44 PM »
What circuit allows you to go more than 15A? I'd be afraid of forgetting how much that draws, and triggering the breaker by accidentally plugging something else into that circuit.

Offline Bushman

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Re: Replaced Davis wall-warts with Tripp-Lite 21A USB Charging Station
« Reply #2 on: June 06, 2019, 07:54:52 PM »
I like the simplicity of it, but use a UPS.
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Offline miraculon

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Re: Replaced Davis wall-warts with Tripp-Lite 21A USB Charging Station
« Reply #3 on: June 06, 2019, 09:13:27 PM »
What circuit allows you to go more than 15A? I'd be afraid of forgetting how much that draws, and triggering the breaker by accidentally plugging something else into that circuit.

Spec says Input Current 120V (1.4A) / 230V (0.7A) per Tripplite.
The output current is 21A at 5V.

Greg H.




Blitzortung Stations #706 and #1682
CoCoRaHS: MI-PI-1
CWOP: CW4114 and KE8DAF-13
WU: KMIROGER7
Amateur Radio Callsign: KE8DAF

Offline Jstx

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Re: Replaced Davis wall-warts with Tripp-Lite 21A USB Charging Station
« Reply #4 on: June 06, 2019, 10:16:50 PM »
What circuit allows you to go more than 15A? I'd be afraid of forgetting how much that draws, and triggering the breaker by accidentally plugging something else into that circuit.

Watt's up, doc?
Input-- 120V x 1.4A = 168 Watts  [about four 40W lightbulbs]
Output-- 5V x 21A = 105 Watts

Standard AC outlet: 120V x 15A = 1800 Watts 
Most AC plugin devices are limited to 1500W; very few things draw that much, generally only heating/ cooling devices, etc.

I use a 14K BTU portable heat pump in the garage and have only ever seen a peak power draw of ~1450W in heat cycle mode, using a little watt/power meter. With the unit producing about 4.5-5 KW resistance heater equivalent BTUs, it's a fairly efficient source of HVAC [only need heat a few days a year anyway, but cooling near year-around if in the garage].
Cheap either way, only paid about $260 new for it [on sale], for 14,000 BTUs of raw A/C capacity, compare that to a typical small 14K [slightly more than "1 ton"] split central-type system starting around $1,800-2,500 retail, plus installation, for ~$3,000+.
Costs: 53.85 BTU per $1.00, compared to 4.67 BTU per $1.00. Or $0.01857 per BTU, vs. $0.2143 per BTU, ~12 times more expensive for a traditional split system.
A BTU is a BTU, watts is watts, parts is parts...

The 'lectric water heater's getting old, going to replace it with a "hybrid" heatpump one. Cost is more than double, but it's much more efficient [4-5 times], with a payback of about a year on the electric bill, gravy after that. Plus, it exhausts "COLD" into the ambient garage air, how kool is that?

Offline sho23

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Re: Replaced Davis wall-warts with Tripp-Lite 21A USB Charging Station
« Reply #5 on: July 05, 2019, 02:05:45 PM »
LOL! I forgot about the step down part!

I thought it was taking in 21A of 120V. That's some crazy stuff right there!

Color me ashamed.