Forums

Search with Wattson
Forums
Sustainable Sidetra...
Solar Photovoltaic ...
Independence from p...
 
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!

Independence from power cuts

 
Page 2 / 6
Solar Photovoltaic (PV)
Last Post by Kev M 4 years ago
63 Posts
8 Users
52 Reactions
18.4 K Views
RSS
 batalto
(@batalto)
Noble Member Member
Joined: 5 years ago
Posts: 1092
05/03/2022 2:19 pm  

@editor what kind of costs are you looking at for 16kwh of storage?


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4425
05/03/2022 9:15 pm  
Posted by: @editor

Out of curiosity, with the heat pump switch off, what does everyone's home idle at in terms go electricity consumption (keeping things like fridges, charges, computers, etc.) running?  

Hi Mars,

During the day and evening it is normally in the 200W to 300W per hour range, overnight it can be as low as 100W per hour.



   
ReplyQuote
Jeff
 Jeff
(@jeff)
Noble Member Member
Joined: 5 years ago
Posts: 600
05/03/2022 11:43 pm  
Posted by: @editor

Out of curiosity, with the heat pump switch off, what does everyone's home idle at in terms go electricity consumption (keeping things like fridges, charges, computers, etc.) running?  

For us, it looks like around 1.2kw to 1.3kw when we were away in October for example for a couple of weeks

 



   
ReplyQuote



Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4516
06/03/2022 10:43 am  

@derek-m, that's good to know. We're currently idling at around 400W during the day when we're working with computers on and with various batteries charging. I'll check what our nighttime load is like. 


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote
Jeff
 Jeff
(@jeff)
Noble Member Member
Joined: 5 years ago
Posts: 600
06/03/2022 2:15 pm  
Posted by: @jeff
Posted by: @editor

Out of curiosity, with the heat pump switch off, what does everyone's home idle at in terms go electricity consumption (keeping things like fridges, charges, computers, etc.) running?  

For us, it looks like around 1.2kw to 1.3kw when we were away in October for example for a couple of weeks

 

I should say that is the total for the day so that would be 50w an hour when we are away. 



   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4516
06/03/2022 3:58 pm  
Posted by: @batalto

@editor what kind of costs are you looking at for 16kwh of storage?

The first informal estimate I got was £7,000 + VAT. With two inverters and the installation.


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote



 batalto
(@batalto)
Noble Member Member
Joined: 5 years ago
Posts: 1092
06/03/2022 4:10 pm  

@editor at those kind of prices you might want to consider maybe building a system? You could easily get double the storage


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4516
06/03/2022 5:15 pm  

@batalto, it may fall beyond my skillset to be honest. I'm keen to undertake any number of new projects, but this is the kind of thing that I would need installed professionally and properly. I wouldn't have a clue how to wire up the PV to the new inverters and battery storage, and make it all sing and dance together. 


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote
Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4516
10/03/2022 10:05 am  

I can't get over how complicated the system of battery storage is with PV when there's a power outage. There are presently, from my conversation with installers, no out of the box solutions to have a system in place where the PV can recharge batteries when the grid's gone down without all kinds of modifications and additional equipment. I'm getting quotes for a system, but I suspect it'll be prohibitively expensive due to all the additional kit that needs to go alongside it. I think SolarEdge are coming out with an inverter this year that may do just that, but who knows.


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
ReplyQuote



 batalto
(@batalto)
Noble Member Member
Joined: 5 years ago
Posts: 1092
10/03/2022 10:26 am  

@editor I wouldn't get too bogged down in things personally. The fact is we don't really get power cuts in this country and if you were to get a really bad one, I doubt you are going to be generating lots of solar power anyway.

Its why I didn't really go down that route - I might in the future, but the cost/benefit isn't really worth it.


12kW Midea ASHP - 8.4kw solar - 29kWh batteries
262m2 house in Hampshire
Current weather compensation: 47@-2 and 31@17
My current performance can be found - HERE
Heat pump calculator spreadsheet - HERE


   
ReplyQuote
 Derek M
(@derek-m)
Illustrious Member Member
Joined: 5 years ago
Posts: 4425
10/03/2022 10:39 am  
Posted by: @editor

I can't get over how complicated the system of battery storage is with PV when there's a power outage. There are presently, from my conversation with installers, no out of the box solutions to have a system in place where the PV can recharge batteries when the grid's gone down without all kinds of modifications and additional equipment. I'm getting quotes for a system, but I suspect it'll be prohibitively expensive due to all the additional kit that needs to go alongside it. I think SolarEdge are coming out with an inverter this year that may do just that, but who knows.

Hi Mars,

The German company SMA make a system. Have a look at their website.

 



   
👍
2
ReplyQuote
Jeff
 Jeff
(@jeff)
Noble Member Member
Joined: 5 years ago
Posts: 600
10/03/2022 11:50 am  
Posted by: @editor

I can't get over how complicated the system of battery storage is with PV when there's a power outage. There are presently, from my conversation with installers, no out of the box solutions to have a system in place where the PV can recharge batteries when the grid's gone down without all kinds of modifications and additional equipment. I'm getting quotes for a system, but I suspect it'll be prohibitively expensive due to all the additional kit that needs to go alongside it. I think SolarEdge are coming out with an inverter this year that may do just that, but who knows.

An honest question, whatever the cost, wouldn't it be better to spend the money on more battery capacity or other efficiency work? 

I struggle to see the point in households spending any money on coping with power cuts? Is it really a priority, especially given your current high electricity use?



   
👍
2
ReplyQuote



Page 2 / 6
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 →