Generation capacity

Hi,

Love the product using it to fine tune my home,

Why is it that other simulation programs(Helioscope) are showing me that i generate more power in summer but in OpenSolar im generating less, my panels get more sun exposure in summer and much less shade but the production/day drops.

I have the exact same 3D layout on both programs

Even if i just put the panels on the ground facing N (For South Africa) the production is the same/worse in the summer??

I have had a look at all my settings and its all good,

Location Bloemfontein South Africa

Any tips or ideas why this is the case?