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diy solar

diy solar

How many panels does it take to charge the batteries if it rains all day? :)

Crowz

Emperor Of Solar
Joined
Dec 24, 2022
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Location
Alabama
Well I added another 10 Dokia 410 watt panels today and with that addition I now have enough data to predict how many panels I need to charge things at 3kw with it raining.

$12,000 worth of panels and support stuff :)

Basically 60 410 watt panels.

Figured I'd share.
 
Well I added another 10 Dokia 410 watt panels today and with that addition I now have enough data to predict how many panels I need to charge things at 3kw with it raining.

$12,000 worth of panels and support stuff :)

Basically 60 410 watt panels.

Figured I'd share.
I’m onboard with your thinking 🤔. I am currently digging a 250 foot trench to my first array. 30-530w panels. Second array will be 30-580w panels.
1759693773362.png
 
Well I added another 10 Dokia 410 watt panels today and with that addition I now have enough data to predict how many panels I need to charge things at 3kw with it raining.

$12,000 worth of panels and support stuff :)

Basically 60 410 watt panels.

Figured I'd share.

Sounds about right. When its raining, i start singing Annie...
 
The best way to get more solar power, is to not use the solar power you have.
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I'm afraid I just use grid power combined with PV (when it comes online). PGE has off-peak rates of $0.09 which makes it more cost effective than a generator. We've been cloudy in Oregon for several days now and the system has been unable to completely charge.

Screenshot 2025-10-05 at 15-49-33 SolarAssistant.png
 
I've got 20 @ 580w panels right now and 14 @ 400w... I'm generating 18w in the DARK according to the monitoring site, although I don't know that I believe that. ;)

Planning on probably another 20 of these bifacial 580w panels to fully max out the inverter, it isn't about capturing 25kw so much as it is capturing enough of anything during the winter months. If I can manage 3k-5k during the winter, I'm doing well.
 
I feel like when it rains its often windy. I have considered getting a helical windmill, but they are not straight forward because they use pwm. So maybe it could have its own battery and inverter, but getting it to kick on when solar is running down seems like a challenge.
 
When its raining i still get some power too, but the amount depends also a lot on the time of the year.
In the summer the sunlight comes much more directly and the days are longer so i get a decent amount even if is raining but in the winter i get very little.
 
I measured one day at 6% max of the panels rated power.

At 12% now, you’ll need twice as many panels, halfway there, so over the hump
 
When it's raining is a broad statement.
I have had rain and gotten the full 10Kw out of my panels ;)
The Rain was falling and cooling the Panels down but the Sun was not blocked by the clouds.
The typical Rain I get lowers the PV down to about 1500 Watts if it's between 11am - 1pm.
The Dark Grey Cloud stuff drops the PV down to around 0-100W.
25Kw of panels is going to make much difference when that is happening.
 
Today has been a cloudy "most" of the day type day. Already discharging and its only 5p.

I mean, if its going to be cloudy and block my photons, it may as well rain so i can at least refill my IBC's with rainwater!

1759784344424.png

50% daily production loss, which isn't bad so I wont cry, just had a sad face...
 

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