Last seen: Sep 13, 2025
Here's the classic 3-phase diagram of voltage against time, which will make better sense of Derek's explanations. I've just drawn this from scra...
... which it doesn't, because the Neutral is rarely fused. Instead, the Neutral wire gets hot, which eventually creates thermal breakdown of the ins...
Yes... and most of that will be down to ignorance. When I see an outage pop up on the NGED Regional alert page, I tend to check where it actually is...
And you're very unlikely to! There are 230,000 ground-mounted local substation transformers and a further 320,000 pole-mounted. Only a few hundred...
To underline those comments from @derek-m 19kW equates to 80A, which is the size of Service Fuse being deployed by DNOs when they get called to site f...
I think both @david999 and @bretix are missing something which I've found an essential part of my route to understanding how this green technology pro...
Yes, Canadian Solar is ok @david999 How do you feel about the short-circuit current of those panels being slightly greater than the 13.5A maximum ra...
@ bretix This is type of fuse-holder which attempts to double-up as a contact breaker. You pull the top handle towards you and the fuses get pulled...
I've just checked the PV-input specifications for your 3-phase 10kW inverter @bretix Like @david999 you have two MPPT inputs,but in your case ...
You may wonder why it is that your inverter is rated for a maximum 3600W output,and yet each of the two PV inputs can take up to 550v x 13.5A which co...
Or, if you'd like a more technical answer... PV panels that you're likely to consider for rooftops have three electrical parameters which we need to...
Sure. No problem:
Latest Posts
-
I agree with @jamespa. If you are not using the tank ...
By Old_Scientist , 24 seconds ago
-
RE: Humming sound on new install.
@adamk Yes, Live Monitor on the 'HPAI' (not the Senso...
By JamesPa , 1 hour ago
-
RE: Is a Valliant Inline 6kW heater a BUS buster?
Much of that is true in principle, but its not likely t...
By JamesPa , 13 hours ago
-
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
@dgclimatecontrol I attach the responses from 2 potenti...
By pash44pump , 17 hours ago
-
I didn't want to say that, bus since you have said it n...
By JamesPa , 17 hours ago
-
RE: Midea ASHP – how to set weather compensation
Mostly, I think, but with some caveats. I set the TI...
By cathodeRay , 20 hours ago
-
RE: Is Your Broadband Router the Weak Link in Your High-Tech Home?
I have been working on network resilience for a while. ...
By Scalextrix , 22 hours ago
-
RE: Buffers, hot water and cooling
@dgclimatecontrol thanks, that's helpful.
By JamesPa , 2 days ago
-
RE: Failing heat pump system - seeking thoughts on a rebuild
I realise im overdue an update on my situation. first...
By Cleardene-ashp , 2 days ago
-
RE: Replacing Worcester oil boiler with an ASHP
@toodles thanks. I was told by the engineer that this h...
By JulianC , 2 days ago
-
RE: Who’s Caved and Switched the Heating On Already?
@allyfish Dogs have owners - Cats keep staff. You are o...
By Toodles , 2 days ago
-
RE: What crazy nonsense are inverter limits and why are they imposed?
A week later, I'm finally picking up this comment... ...
By Transparent , 2 days ago
-
RE: COP is not the only measure of efficiency
We keep all our TRVs fully open using the whole house a...
By Old_Scientist , 2 days ago
-
RE: Havenwise App Help & Forum Support – Get the Most from Your Heat Pump
I am pleased to say at 4pm today we have added another ...
By ASHP-BOBBA , 3 days ago
-
RE: Renewables & Heat Pumps in the News
To unpack this a little.... 1) how many of us in this...
By Lucia , 3 days ago
-
RE: Vaillant aroTherm Plus 10kW thoughts?
@realevil the fans and fan speed / coil size (height, w...
By ASHP-BOBBA , 3 days ago
-
RE: Mitsubishi Ecodan 11kw Defrosting Issue.
@morgan this can just be done by your sepecilist when t...
By ASHP-BOBBA , 3 days ago
-
RE: Anyone still weathering it out with Agile?
@toodles I guess it all comes down to import averages. ...
By Tim441 , 4 days ago
-
RE: 300 Liter Tank - Do I have to heat it all?
The size of DHW tank affects the anti-legionella cycle....
By Transparent , 4 days ago
