Solar generation in rain/cloudy conditions

Lupus said:
Son has ruined my Oct so far, using 0.3kWh this morning, he decided to run the microwave while the heat pump was running, pushing the voltage low for to long sigh
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What! You drained your battery below 50% SOC?
 
Lupus said:
Not nice, he knows not to use the microwave when the pump is running
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When does it switch to grid? What's 0.3kWh of microwave going to do? You have 12kW inverter, HP = 1.5kW, MW = 1.5kW, total 3kW. Glad you using most of your battery, that's the nice part.
 
Bifacial panels. Do they even make a difference when mounted on a tile roof ? Cannot see the point as no light will reach the backside of the panel ?
 
A lot of clouds around at least the UV index is keeping generation somewhat enjoyable.

Screenshot 2026-10-05 115325.png
 
biena said:
Bifacial panels. Do they even make a difference when mounted on a tile roof ? Cannot see the point as no light will reach the backside of the panel ?
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Still buy them though unless mono is cheaper. From what I remember, there wasn’t any price difference between mono and bi. So mind as well get Bi.
 
wingnut771 said:
When does it switch to grid? What's 0.3kWh of microwave going to do? You have 12kW inverter, HP = 1.5kW, MW = 1.5kW, total 3kW. Glad you using most of your battery, that's the nice part.
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When you've got the heat pump running at the same time as the microwave, voltage mode means that the voltage can drop below the threshold as there is a high draw.
 
biena said:
Bifacial panels. Do they even make a difference when mounted on a tile roof ? Cannot see the point as no light will reach the backside of the panel ?
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No idea, but the ones I do have do seem to give marginal better performance than they should.
 
denmendez65 said:
Still buy them though unless mono is cheaper. From what I remember, there wasn’t any price difference between mono and bi. So mind as well get Bi.
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Lupus said:
No idea, but the ones I do have do seem to give marginal better performance than they should.
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Neighbor looking to install and asked my opinion, I have mono, looks like prices are climbing again.
He is so fed up with Tshwanes power, going to plaster his roof with panels.
 
biena said:
Bifacial panels. Do they even make a difference when mounted on a tile roof ? Cannot see the point as no light will reach the backside of the panel ?
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If on a ground mount ,flat roof (obviously mount at an angle) or integrated carport (where the panels are the actual roof) if you paying more for them and you have a standard roof then its a waste - if you getting it cheaper then an equivalent or less wattage monfacial then obvious worth it
 
wingnut771 said:
Aren't they lighter, cheaper and run cooler?
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Not sure on cooler and lighter. I have a mix of Bifacial and Mono. My first 6 are Bifacial.

When I wanted to add more I could find the Bi but mono was available. Exactly the same front panel spec and same brand. I didn’t notice a weight difference. So the other 2 are mono. 1 on the string with the Bifacial and the other is on the Victron.

Price was the same.
 
I have these : https://www.geewiz.co.za/solar-pane...-topcon-bifacial-dual-glass-solar-module.html

7 on a flat roof; the panels are angled, and the roof is painted light grey (The Duram roof paint) for reflective light

The other 5 are on the normal-pitched house roof, so I don't think the bifacial makes any difference there.

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Pv1 is the 7 panel string pv2 is the 5 panel string


I would just get the latest tech spec of panel if you are looking to put solar. Bifacial, N-type etc...
 
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