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diy solar

diy solar

Power Production This Time of Year!

I understand now. You batteries supply the power to the inverter, not the chargeverter directly to the inverter. Be nice if you could do that though.
It's actually directly to the inverter. And the batteries buffer surges.
 
I waiting for a more elegant solution, like a dc bidirectional to my EVs, but right now my emergency plan is connecting the 120v outlets to chargeverters to top up on a low production day. Charging limited to 3000W isn’t great. But it’s something.
 
Interesting day, the morning was fairly hazy, but cleared up and then intermittent clouds, but this was an all time record for the 14.4KW array @

77.7 KWH Whooo who!

Getting closer to my first -$0- for a day power bill.


Not sure if the existing array is enough, but the 390 watt bifacials should be delivered by Tuesday if not sooner.

Been doing my very best to only charge the EV off of solar excess when the Power Pro batteries get near full. Finally wised up and put the 18KPV in self consumption mode, instead of back up mode.
 

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We are without solar PV at present in our new place so I have to be content with recording consumption. Since we moved in we are running at 19 kWh/day.

Screen Shot 2025-04-14 at 1.18.20 pm.png

EV charging consumption is a little higher than normal, which would be due to the extra driving associated with our home move.

The water heater is a solar thermal system with an electric booster element if required, so this is just the booster consumption. Lots of rain and cloudy weather of late.

No aircon or heating system in the house, we will be adding reverse cycle ducted aircon system and that will add a lot to consumption, especially in summer. Pool pumps (regular filter / sanitation and solar thermal pool heating), else it's just regular household stuff, cooking, appliance use, lights and ceiling fans.
 
This was my first time setting up my Delta Pro with real panels since I bought it a couple years ago. Using 2 - 345W, 48V panels in series, got peak of 650W total. I like it! Going to add another pair. Being new to this, I was surprised that even a slight haze reduced the output dramatically.
 
Being in the Finger Lakes, I concur. I have snow on my panels today. Below are my last 7 days. Sunday was my highest ever. The days before Sunday weren't winners, and today is not looking good.

View attachment 292622
Sunday was my best ever for the panels I've got hooked up as well, took a lot of work just balancing charging just 15kWh of batteries and dump loads all day, about 7kW of panels are currently disconnected for backyard rearranging so max production yet to come. Didn't bother pushing harder yesterday with draining to near empty for start of day etc just let them fill up and float.

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This was my first time setting up my Delta Pro with real panels since I bought it a couple years ago. Using 2 - 345W, 48V panels in series, got peak of 650W total. I like it! Going to add another pair. Being new to this, I was surprised that even a slight haze reduced the output dramatically.
Delta 2 max was my gateway from river 3 to total solar addiction, proceed with caution :)
 
Delta 2 max was my gateway from river 3 to total solar addiction, proceed with caution :)
Oh, I am fully aware of this. I have this setup at my off-grid property, and we are building a real cabin this summer so I'm already spending dollars I don't have on my new solar system, dreaming about it, LOL.
 
What a weird looking production graph, must be the self consumption mode adjusting.


but,

Best day of output so far 85.6 KWH from the 14.4 KW array.

Still working toward a 0 import day.Screenshot 2025-04-22 193049.pngScreenshot 2025-04-22 202016.png
 
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I would ask why that consumption line looks so odd. Rather high base loads and all those high frequency spikes. What loads are you running?
I was chasing the sun during part of that loading with the Tesla wall connector, washer, dryer/ water heater during that pogo stick graph. Same maybe even better (cloudless) weather today and no EV charging but flat wall batteries charging. We let the wood stove go out so the forced air heat was using 15000 watts this morning , solar output looks smoother. We have a mud room that has a radiant heater that was going during that time as well so cycling on and off.

Another really good day 86.2 KWH

edit: wow this sunny summer trend is Great 88.3 KWH

A 90 KWH day is so close I can almost taste it.




Edit: May 1st, smoother MPPT graph than the jagged one, couple trees block for short drop outs in the afternoon,

but, today was a record for the array

92.9 KWH


I see why winter can be a downer, I will look back on this production during cloudy winter days fondly, and think it is gone for now but spring is around the corner and "Blue Skies, Nothing but Blue"-by Irving Berlin will be playing in my head again.
 
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I was chasing the sun during part of that loading with the Tesla wall connector, washer, dryer/ water heater during that pogo stick graph. Same maybe even better (cloudless) weather today and no EV charging but flat wall batteries charging. We let the wood stove go out so the forced air heat was using 15000 watts this morning , output looks a lot smoother. We have a mud room that has a radiant heater that was going during that time as well so cycling on and off.
Understood. We have tankless water heaters on Propane. Ducted Daikin HVAC which are infinite variable speed so the load with those is smooth and not spiky. If all four zones happen to be running at the same time it’s only 5.6 kW. The only big spike is the water well pump (1.5 hp) but we have 7,500 gallons worth of storage on the ground so the well pump only runs maybe once a week for 90 minutes. The cheapest part of our solar system was building the home as efficient as possible. We are net export 12 months of the year.
 
Hi all. Got my first bill credit. 41 dollars of credit over the two meters for March. A bit too early to tell, but it is looking like I could be running 8 months of credit and 4 of deficit. Considering that includes heating, that is a good outcome.

Feb. was only a 40 dollar bill and that included heating on some stupid cold days. 1950kWh used in heating alone.
 
Hi all. Got my first bill credit. 41 dollars of credit over the two meters for March. A bit too early to tell, but it is looking like I could be running 8 months of credit and 4 of deficit. Considering that includes heating, that is a good outcome.

Feb. was only a 40 dollar bill and that included heating on some stupid cold days. 1950kWh used in heating alone.
Sounds like you might need some more production to get 12 months.
We are able to be net export 12 months a year.
Thermostats 24/7: Heat = 62F, Cool = 70F
We Net Export over an outdoor temp range of 32F - 95F
Snow removal on the two ground mounts takes 20 minutes when required.
 
Weather was wonderful here but suddenly its rain season or something. Actually running the generator some to charge backup its so cloudy.
 
A near perfect solar day and I’m still yet to get my panels up 🫤.
 

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