Help on solar panel installation location

craigwynne2k

Hi,

We are currently getting quotes for solar and possibly battery on our home. We have lots of roof space but as its made up of two extensions its not a nice simple layout! We've had two different offerings in regard location of panels. Both recommend location A for 6/7 panels and then they differ with either location B or C. We live in Shrewsbury and during the day we are low users of electricity but are heavier (when the kids are at home) post 4.30pm. Any help and recommendations would be very gratefully received!

Craig

craigwynne2k

The image didn't come through, I'll try again!

Magnitio

Do you use more electricity in the afternoon/evening than in the morning? If so, then C may be preferable to B.

craigwynne2k

This is a typical profile:

craigwynne2k

Not having much luck with images! We have a small peak in the morning, and then a peak around 4.30 and then generally higher usage 5-10pm

Raxiel

My first thought is, does the section of roof with no proposed panels shade C much when the sun is low in the sky at this time of year?

My system was installed last October, and so far the SW facing panels have seen a little more sun per panel than the SE (but there's not a lot in it, and day to day it varies).

If there's no shading A & C will probably give more useful output in the winter. A & B will probably see more generation overall.

If you went for all 3 you'd get the best of both but with a bigger up front cost.

That would likely put you over the G98 Export limit, but since its impossible for all the panels to be in direct sunlight at once you'll never hit the theoretical maximum so you could justify capping the export.

Just depends how much the extra panels + fitting cost and if the inverter needs an upgrade too.

Magnitio

craigwynne2k said:

Not having much luck with images! We have a small peak in the morning, and then a peak around 4.30 and then generally higher usage 5-10pm

Based on that usage, then I would think C would be preferable. That assumes you don't have any extra shading on C than you do on B.