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Anonymous06/25/25, 20:03No.2926704Solar and off-grid thread
Previous >>2903345
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Anon06/26/25, 03:02No.2926781
I will Get a Huge 167ah Battery this year.
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Anon06/29/25, 16:19No.2927613
Reminder to read shit before axing stupid questions.
https://rentry.co/solarshit
https://rentry.co/heatshitCurrently "cooling with heat pump" is being updated in heatshit, as I experiment with my system more. Did a lot of work changing the distribution design and implemented reversed flow/return for radiator cooling. Might make a video or stream later to go over the entire thing.
Cooling an entire not too well insulated house eats up a fuckton of power though, it's doubling my power consumption.
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Anon07/07/25, 16:47No.2929589
bump
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Anon07/08/25, 02:17No.2929716
Had a power outage for about two hours. Ran my fridge off a battery / inverter. It was eating around 200 watts. I used my battery ryobi fan and aimed it at the coils / compressor. Power use dropped to around 190 watts.
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Anon07/10/25, 01:08No.2930176
What are my chances on smuggling lifepo4 cells on my check luggage? Airfare and taxes are like 150% the cost of the cells.
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Anon07/12/25, 03:21No.2930744
Anyone ever run their reptile room off solar power? I am looking into buying a snake soon and I want to use solar power for the heater and thermostats
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Anon07/12/25, 17:14No.2930881
Greetings, Gotten my hands on a cheapo hybrid inverter that runs on 48V and has a RS485 port. No panels yet.
Ordered 2 identical 24V lifepo4 batteries for it on sale. Pic related. Both batteries have internal BMS for their cells but no output port. I reckon these 2 batteries would be better off balanced between themselves as well. Would an external BMS be up for the tasks (i.e. hook it up to the +&- on the batteries but not to their internal BMS'es) or should I crack the 2 batteries open and connect the external BMS to their invididual cells directly?
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Anon07/12/25, 20:19No.2930918
Is going all out on Maxeon 7 panels and a 180 kWh Anker battery solution the most retarded thing one could do?
(main motivation behind all of this: spite)
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Anon07/19/25, 16:01No.2932630
Getting my 7.5kW penis extension next week, gonna have almost 13kW total. Should hopefully cover most of the running costs of the heat pump, saving about $2k a year on gas.
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Anon07/27/25, 04:02No.2934507
Still working perfectly. Probably the first time getting the hv pack down to around 70%.
Whole lot of grinding/welding I've been putting off.
Still only have ~1.2kw of panels so I must have used a little over 6kw lel
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Anon07/27/25, 23:24No.2934731
Getting a new shed soon. Quote for running power out to it is insane. All I really need is some lighting. Are there any good options to simplify that as much as possible like maybe some sort of lights made for an RV that I could run straight off 12v? I've got deep cycle lead acid batteries scavenged from a UPS but I wonder how they'll handle hot cold cycles seeing as they've meant to be for indoor use. Are the hobo freight solar kits good enough for something like that or are they too shit even for this sort of thing. I'd want to run some decent flood lamps for maybe like 6 hours tops so I can work on my cars behind the shed.
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Anon07/30/25, 05:23No.2935215
I want to buy a battery that be be discharged and charges at the same time, to power a tiny computer plus the computers screen 24/7 so other than the port for input power from the solar panel, it would need a minimum 3 USB ports.
There are lots of batteries like this. But the place I need to run it has horrible winters and it will get down to maybe -15F at worst. So the night will be long and cold and the computer will still need to run through the night. What kind of battery is one supposed to buy for this type of area? What do Alaskans buy which also has 3 USB ports on it?
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Anon08/07/25, 14:19No.2936861
If you were ever wondering how bad it is when a tree shades most of your solar panels in full sunlight, I have the answer for you.
At 1PM the shadow moves to only cover 3 panels, at which point software limitation kicks in for legal reasons, so real performance at that point could've been higher, but the entire morning being fucking dead is the tree.
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Anon08/22/25, 14:33No.2939938
I'm thinking of building an outdoor weather + air quality station. I'm talking arduino/esp32 type project. Where I can build the thing and leave out there year round to ping data to my house. It will have temperature, humidity, wind speed, particulate matter
Maybe I'll add more sensors later if this works. I want to put it in a little dog house type box outside with the solar panel on the roof of it and the electronics+battery inside.
What kind of solar setup do I need?I was thinking a 12V lead acid battery. Maybe a 10W-20W panel. Some basic charge controller. Am I on the right track? It's probably oversized to run some little Arduino project but I don't know of a smaller scale setup. I thought of repurposing some 18650 solar light. But lithium is supposed to be no good to charge below freezing.> If your application strictly requires charging a battery in freezing temperatures, lead acid can theoretically go all the way to -40°C - with many caveats
Where I am the temperature range is -20C to 35C (-4F to 95F). Realistically the cold temperature range is -10C to 0C. Maybe a few days year does it go to -20C range. I read elsewhere that lead acid can also freeze??? But this here guide says it can do -40C with caveats. What are the caveats?
I can't tell who is being pedantic internet nerd vs practical use.Am I overthinking or can I just make some basic 12v lead acid setup. Then make sure my electronics sips little battery as possible so it's basically always near full charge.
I've already made battery powered temperature/humidity sensor and PM2.5/CO2 sensors. They operate at very low poll rate for long run time. I'm looking to make larger scale weather station thing. I don't know what I'm doing with this solar stuff.
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Anon08/22/25, 16:49No.2939970
big oil won
they laugh at solarfags
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Anon08/23/25, 07:55No.2940093
Given electricity is 20 cents a kwh it seems a waste to generate it oneself. For me I prefer having batteries and power stations just for those rare occasions when I get a power outage.
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Anon09/02/25, 06:04No.2942389
Is it me or is the government auctioning off all it's solar panels for nothing right now?
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Anon09/12/25, 08:28No.2944467
I've had a cheap 6kwt inverter with batteries but no panels attached running as backup for a while.
Instead of having it run in bypass mode 99% of the time I've wired a reserve input switch (pic related) and have kept the inverter mostly turned off. I've tested it a bunch of times and it worked well.
Finally bought a few panels recently, hooked them up, the inverter recognized them. Switched it from "UTI" mode to "SUB" as that seemed to make the most sense.
Ran the test by switching the relay to manual mode and flipping the switch from utility to backup — just like many times before. This time however lights flickered and went out. Backup mode hasn't worked since, whether on auto or manual. Utility/mains mode runs fine.
I now read 240ish ohm resistance between backup line in and load line (the two bottom left connectors) when in backup mode. Not sure if it's always been like that. Running off utility/mains a similar measurement (common power in to load; i.e. top left to bottom left connectors) reads 0ohm which makes perfect sense.Reading through testimonies, apparently these kind of devices with red-colored switches are designed for petrol generators whereas for inverters/solar one has to install a similar-looking thing but with a green flag/switch, though I don't see how a simple relay that can survive whatever waveforms cheap petrol generators throw at it would get fried by a "pure sine" inverter. Don't have an oscilloscope to test what it looks like, particularly when the switch triggers, sadly.Currently torn between ordering the green-colored version rated for inverters or a basic manual 3-position tumbler and forgetting the automatic thing. If these reserve input switches get fried by abnormal waveforms, maybe it's best to have one installed so that it takes one for the team instead of my pc.
Also not a fan of how close the pins on the control line are to each other, the wires are practically touching, sneezing on them would close the circuit.
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Anon09/16/25, 12:30No.2945169
Would this work anons? Might upgrade to 3S2P if i have to
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Anon09/22/25, 22:10No.2946385
Price wise, what am I looking at if I want to power a couple of 300 watt led grow panels, a large filter fan and large dehumidifier in my unfinished 15x15' basement?Ideally just panels that charge batteries I can plug a few things into. Doesn't need to touch the grid at all.
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Anon09/28/25, 12:52No.2947512
>I think I'll just die a virgin instead.
Bro thinks he can change his zodiac sign
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Anon10/03/25, 17:08No.2948543
our home solar power system upgrade arrived today. 182% PV array expansion. 100% *usable* Battery storage upgrade.current PV: 2440W
after install: 6940W.current storage: 300Ah FLA
after install: 300Ah LiFePO4It's a grid-tied, non-exporting system. this will put us off-grid most of the time. it will make 120% of our daily load during the 9 cooler months, and it will cover 80% of use during the 3 hottest months of the year. we will keep our grid connection for all the obvious advantages, but will only be paying the basic connection fee 75% of the year. I expect to see our yearly total expense drop by 85%-90%.it will likely take all month to get it fully installed and online. I will start digging the holes and setting the posts tomorrow. i/we have been saving and planning this for 4 years.
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Anon10/06/25, 13:56No.2949101
i want to do a ghetto setup for power cuts, just need something to power an inverter (2000 watt) enough to power a kettle/ air fryer and some lights, also ukfag so 240V.got an old moped 100cc, will a motorbike battery power an inverter? can i pull one of the headlight bulbs and get my 12v to power the inverter from there?could also run the moped off a car battery, would the bike be able to keep the battery charged enough?also how long would a 2000w inverter run for off a fully charged car battery?also retarded so try to make your answers, simple. thanks
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Anon10/06/25, 14:34No.2949113
Anyone on here experienced with solar submersible pump kits? Any recommendations on brands to get or avoid?I'm going to need to dig a couple shallow wells for livestock water and set up some solar wells to keep some water tanks full.
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Anon10/13/25, 07:46No.2950510
Would I be better off getting the 800 watt or two 400 watts bougerv solar panels? I can't find any information.
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Anon10/17/25, 14:46No.2951298
I recently bought a 310W Longi solar panel, but have yet to generate anything yet. It's been cloudy the past few days so I'm sure that's been playing into it. But, I may have damaged the panel trying to get it through my window. How can I test the panel without direct sun?
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Anon10/17/25, 17:04No.2951322
Now the angle is off and that's not helping. But the previous set up I had was still producing some wattage at this angle (when it was getting sun.) The reason I'm worried about it being broken is the thing was subjected to torque based tension when I was trying to get it through the window. I've dropped panels in the past and gotten away with it, but I've never tried to twist one.
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Anon10/17/25, 17:15No.2951325
Worth noting there is 3 junction boxes on the back, I've only opened 2 the positive and negative ones.
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Anon10/17/25, 17:41No.2951333
fuck
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Anon10/17/25, 18:01No.2951338
which probably means it's totaled, yes?