Extra Low Voltage devices
Posted by: @derek-mHaving looked at the specification for several DC to DC Converters, they would appear to have efficiencies within the 80% to 90% range
Well the ones I have here are certainly more efficient than that!
The monitor in front of me is running on 19v which has been supplied from a DC-DC Converter with 54v input.
If it were only 80% efficient then it would be emitting 11.4w as heat. But there isn't enough temperature rise on the aluminium case for me to measure it as being any different from ambient.
I'd need to insert an ammeter into the circuit to get an actual figure. But everything is hard-wired, so that'll have to wait for another day.
Perhaps the 80-90% figure you're reading is when the DC-DC Converter is being used at its full current rating. It's rare that I'd run a Converter above 80% of the specified max current.
Save energy... recycle electrons!
- 22 Forums
- 2,090 Topics
- 46.1 K Posts
- 34 Online
- 3,383 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Adding battery storage to SolarEdge PV system
@chandykris No need to apologise at all! I forgot to ad...
By Toodles , 33 minutes ago
-
RE: Say hello and introduce yourself
Yes please do Suggesting a loss in the region...
By JamesPa , 1 hour ago
-
RE: Surface mount or bury primaries for heat pump installation?
Can we have some links to those you're considering plea...
By Transparent , 1 hour ago
-
RE: Weather compensated secondary circuits with Biomass
If anyone’s going to know the answer to this it’s @sune...
By Mars , 10 hours ago
-
RE: Commencing on an ASHP Installation Process
That outside pipework would concern me. Surely rigid se...
By benson , 21 hours ago
-
As I have reported elsewhere we turned on the cooling o...
By downfield , 1 day ago
-
-
@el3b Hi, sorry to hear that, it is advisable to instal...
By ASHP-BOBBA , 2 days ago
-
RE: Difficult positioning of air source heat pump
@rikiarn Out of intrigue, the thread reads as though Ai...
By Sheriff Fatman , 2 days ago
-
RE: Mitsubishi Ecodan Fails to Heat Water despite temperature drop
@m1kegibson If you are able to access the service me...
By HarriUp , 2 days ago
-
RE: When will heat pumps and install prices come down?
... which of course is impossible because the world mov...
By JamesPa , 2 days ago
-
My advice is reject unless they will delete the buffer ...
By JamesPa , 3 days ago
-
RE: Battery storage to run Heat Pump.
I would be surprised if the battery chemistry is going ...
By Transparent , 3 days ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
@dowallydrifter OK. I would recommend you read t...
By JamesPa , 4 days ago
-
RE: Solar to power Heat Pump for DHW
Wow, how big is your heat pump that it is pulling 6kW d...
By Old_Scientist , 4 days ago