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My Blog | nomaallim.com

Why solar panels do not work behind glass

14/11/2022

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Context of tentative PVs installation behind glass

I deciced to turn my apartment's balcony into a source of electricity, especially it is ideally oriented towards the South-West, on a hill facing the Mediterranean sea. 180W solar panels were found to fit in the available space, as per the below picture. I temporarly wired two panels in series underneath the railing and behind the glass.
Picture
On a very sunny day and against a maximum theoretical current of 9.52A (Imp), the measurements I conducted simply proved that there's no use to install PVs behind glass.
Picture
Picture
The below figures do show the Amps readings at the same moment of the day, with the solar panels installed behind the glass (left) and outside the glass (right), and indeed in the exact same place and orientation:
Picture
Picture
The conclusion leads to no confusion, taking into account the below factors:
  1. Trial carried out in November
  2. Location nearby the sea (high relative humidity)​
  3. Location is in the city's suburbs with some air pollution 
  4. Panels installed vertically ​
  5. Voltage is imposed by the 2 tubular batteries in series, mounted in a floating mode on a solar controller and a battery inverter.
The solar panel generated a maximum of 6A instead of 9.52A, that is a loss of -37% compared to Imp.

When installed behind glass, the solar panel's output peaked at 3.4A, that is a further -43% reduction or -64% from the rated maximum current.

Installing solar PVs on a balcony

Taking the above into account, I had then to modify the glazed aluminum frames in order to replace parts of the glass with PVs...until transparent PVs are made availble in the market and can be used for windows!
Picture
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  • Home
  • About
  • Contact
  • My Blog
  • Our Free DIY Tips
    • DIY basics
    • Safety At Home
    • Garden tips
    • Finishing Works
    • Home Appliances
    • Plumbing
    • Multimedia
    • Electrical
    • Car Maintenance & Repair
    • Small Generator Fixing
    • Bicycle fixing
  • Small DIY Projects
    • KITCHEN AND BATHROOM >
      • Kitchen: build a trolley | Not a robot
      • Adding shelves between cabinet and wall
      • Kitchen: adding small shelves for spices
      • Bathroom: free space | remove the bidet
      • Bathroom: Replace your embedded PEX outlets
      • Build a shower tray for elderly people
      • Installing an above counter basin
    • GARDEN >
      • A Low Cost and Easy to Fix Trellis Separation
      • Installing a water tank
      • Superb DIY garden pond with jar
      • Backyard workshop and storage
      • How to build a brick planter
      • Installing and programming a motorized gate opener
    • BEDROOM >
      • Adding a panel heater
      • Clothes drying racks
      • Diy cushion bedhead
    • LIVING ROOM >
      • Hanging the TV to the Wall
      • Adding lights to a green wall
      • Cabinet for AV equipment
      • Mini-pond for goldfish
    • CUPBOARDS AND BOOKSHELVES >
      • Cupboards & Bookshelves Basics
      • Build and Hang a Cupboard to the Wall
      • Build a Bookshelf
      • Building a bathroom cabinet
      • Wall to wall wardrobe
    • CAR >
      • Matra Rancho Renovation
      • How to buy and rebuild a used carburetor
  • DIY Cook
    • Spices and condiments
    • Utensils and non-food items
    • Fish & Sea Food
    • Soups, starters and side dishes
    • Lebanese and Mediterranean Mezze
    • Main courses
    • Coffees and breakfast
    • Desserts and pastries
  • Cars tips & tricks
    • Mechanical maintenance
    • Electrical and Ignition repairs
    • Dependability and drivability
    • Auto detailing
    • Abandoned and old vehicles
    • Car Insurance and Regulations