Renewable Heating Hub Heat Pump Forums

Search with Wattson
Forums
Sustainable Sidetra...
Solar Photovoltaic ...
Second PV String on...
 
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!

Second PV String on Growatt Hybrid Inverter: Orientation Advice & Shade Independence Questions

 
Solar Photovoltaic (PV)
Last Post by Judith 7 months ago
2 Posts
2 Users
0 Reactions
1,096 Views
RSS
 David999
(@david999)
Reputable Member Member
Joined: 3 years ago
Posts: 348
Topic starter 30/03/2026 2:50 pm   [#2918]

I touched on this last year and it’s time to push the button.  My growatt hybrid inverter has two connectors for two strings of panels so intend to install another string to max out capacity. Only one connector being used currently. 

1. should I add them in the same direction or face them westish  to capture the sun as it passes over my house then sets 

2. will these being on a seperate plug on the inverter operate independent of the other string and not be reduced when lack of sun either side, like in shade.  

3. I read that the feedback was likely to be removed as the suppliers become more self reliant and that in some countries you have to pay them to unload your solar.  Has anyone heard that as well?


This topic was modified 8 months ago by Mars

   
Quote
 Judith
(@judith)
Prominent Member Member
Joined: 3 years ago
Posts: 554
02/04/2026 12:35 pm  

Wholesale prices can go negative in the middle of the day from spring to early summer, lots of sun no huge air conditioning demands yet. But you don’t have to export as a domestic user, (nor do commercial sites) the panels just get warmer by about 10-20%

Commercial sites will export at negative rates to ensure they get constraint payments from government (ultimately us) or other subsidies. 


2kW + Growatt & 4kW +Sunnyboy PV on south-facing roof Solar thermal. 9.5kWh Givenergy battery with AC3. MVHR. Vaillant 7kW ASHP (very pleased with SCOP >4) open system operating on WC


   
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Click to access the login or register cheese
Protected By
Shield Security PRO