Forums

Search with Wattson
Forums
Sustainable Sidetra...
Solar Photovoltaic ...
Solar together - in...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Solar together - infinity renewables

 
Page 2 / 2
Solar Photovoltaic (PV)
Last Post by Transparent 1 year ago
15 Posts
6 Users
5 Reactions
3,655 Views
RSS
Transparent
 Transparent
(@transparent)
Famed Member Moderator
Joined: 4 years ago
Posts: 3178
16/11/2024 3:06 pm  

@burtis  we don't know how many PV panels can be fitted on your roof.
You might be able to estimate it if you know the size of your tile/slates.

The majority of panels are about the same size: 1.0 x 1.6m

And the output is also becoming very similar across manufacturers:

Voltage will be in the mid-thirties (32-38v ish)
and current will be between 11-14 Amps.

The majority of inverters have a similar voltage range which is 'acceptable' for a string of panels to be connected:

Anywhere from around 150v to 450v will usually allow the MPPT peak-power tracking system to work

So if your roof can support a significant number of panels (as mine can), then you need them divided into separate strings which present a sensible output voltage towards the top end of the range.


Save energy... recycle electrons!


   
👍
1
ReplyQuote
Burtis
 Burtis
(@burtis)
Estimable Member Member
Joined: 2 years ago
Posts: 120
Topic starter 16/11/2024 3:34 pm  

@transparent 

LookIng at my local area all houses are the same basically. Old council lots. 

Most have 14 panels on the roofs they are quiet old though so maybe newer ones are larger (some have 10 probably because of shading from a neighbour by the looks to the hill and steps)

I have no idea about any of this just thought ahhh seems like good value and I don't plan on moving so get it on the roof earlier rather than later 😅

Should probably keep the money aside to sort the heat pump out though if that all goes tits up



   
ReplyQuote
Transparent
 Transparent
(@transparent)
Famed Member Moderator
Joined: 4 years ago
Posts: 3178
17/11/2024 12:15 pm  

What will have changed over the years will be the power output of those PV panels.

5 years ago a 'standard' 1.0 x 1.6m panel would be producing around 250-280w peak.

2 years ago that would be 360w

Now you can get 460w

So you can achieve a lot more electricity from the same-sized roof area.

 

Another thing which installers sometimes forget is that the panels don't mind if they're arranged vertically or horizontally on the roof.
If you look around, you can find houses with roof space wasted because more panels could've been fitted if they'd been placed horizontally.
Sometimes the panels manufacturers stipulate that the fixing-clamps must be on the long-edge...
... but there are vertical-oriented roof-rails which can be fitted if that's the case.

The cost of the installation work itself is now such a major part of the overall price that there are unlikely to be better deals if you wait until later.
Even if you negotiated a further 10% off the price of the panels themselves, it would make negligible difference to the final bill.


Save energy... recycle electrons!


   
👍
1
ReplyQuote



Page 2 / 2
Forum Jump:
  Previous Topic
Next Topic  



Share:

Join Us!

Worth Watching

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security PRO
This Site Is Protected By
Shield Security PRO →