SolarDIY

If this type of post isn't allowed, I can take it down. I am not affiliated with LiTime but I like their batteries since seeing Will Prowse's teardowns of them. They have some smaller battery options for DIY projects.

cross-posted from: https://natur.23.nu/post/12050

I wanted to park my bikes - or depending on the Season - my Renault Twizy somewhat protected and easy accessible.

After adjusting the yard fence to form a pocket I put a frame aluminium profiles on top. On top of that is a second frame which is angled at 10 degrees and on that are the solar panels.

10 degrees seem to be a viable compromise between self cleaning, sun capture, construction height and openings to the elements on the side.

It was much more challenging than i thought to find solar modules with a form factor fitting the shed.

4 Standard modules where far to big. So I choose two modern 410 Wp modules and 3 130 Wp “camping” modules.

I got two 600 W dyne (“Bosswerk”) Micro-inverters cheap, because everybody want’s 800 W now and they have a regulatory issue with a missing relay.

The 130 kWp panels are cabled serially but still seem to have issues getting enough voltage to start the inverter in the morning.

I’m happy with the project. Things in the shed are getting much less wet during rain und not baking hot during sunshine.

I might close the gaps between the panels obe day but that is low priority- the thing was never meant to be totally watertight.

I also like it being some kind of Solarpunk landmark in our street.

I'm looking for a small setup that allows the panel to be removed without removing screws from the roof and exposing holes.

My office/ lab at home uses around 600W when fully running, and I see that there are quite a few power stations that will comfortably handle that, and foldable 4 panel setups that can generate 300-400W.

Would there be any issues plugging a UPS (my lab has a few of them) into a solar power station such as this?

Is there some sort of feature I want to look for such as sin wave, etc to have this work reliably, or does a UPS not really care since the controller in the power station should be normalizing voltage, etc?

How do I design a large solar system that spans many buildings across a few km?

If I search the internet for guides on how to design a photovoltaic solar system, the results are saturated with how to build a small setup (eg for a car or caravan) or a "large" setup (eg just for 1 building).

But how do I get information on how to build an off-grid system that spans many buildings? What keywords can I even search-for that describe this type system to find such resources?

The general specifications are:

1. A community of ~300 people,
2. Spanning ~10 buildings,
3. Each building is located 10-100 meters apart, and
4. Each building's roof has up-to 20 kW of PV panels

The main questions that I'd like clarified revolve around how to tie the systems together. Should the batteries be stored in one building or distributed? Where should DC be converted to AC? If I end-up with >100 kW and want to power heavy machinery, how many volts should the system be? What are the trade-offs in all of these decisions?

Most importantly: what do you "call" these systems, and how can I find documentation and guides on how to build PV solar grids that span multiple buildings across a medium-sized community of tens of hectares.

Hey guys I am planning to do my own solar and am looking into some kits and prices. I was quoted $22k for a 7.4kw system but I'm thinking of doing a 12.7kw one myself without the bloat of a loan and contractor install.

The problem I'm currently having is trying to pair up a premium panel with Enphase microinverter. I see that REC is highly regarded as one of the best, but the REC 420 is only compatible with the IQ8X which together will run me over 14k for just the panels and inverters, let alone the rest of the infrastructure. But the REC 400 is compatible with the IQ8A.

Suntansolar has some pretty nice kits, one of which has the ZNshine 410's that run a little longer but I should have the space, as well as the Iq8a micros. But I'm not familiar with that brand.

Does anyone have experience with a good combo set of panels and inverters? I think generally the consensus has been that microinverters are the way to go.

Can I connect a 5w 5w solar panel directly into a 10k mAh portable battery bank safely via USB 2.0, or does it need some sort of protection in-between like a solar charge controller or a schottky diode?

Example of battery bank (except one with usb 2.0 input): https://www.anker.com/ca/products/a1229

Example of solar panel: https://www.aliexpress.com/item/1005006012344670.html

Hey all,

I've got a set of three 60-cell panels and microinverters that I want to mount on an asphalt shingle roof. I'm planning to expand the array to 16 panels in time.

Does anyone have recommendations for low-cost mounting systems and online retailers that sell them? I like the idea of rails, but from what I've seen shipping costs are prohibitive and I'm trying to do this on a budget, so rail-less options are appealing also.

For several years I've used a Raspberry Pi Zero for sensors, camera & door motor control which opens & closes a chicken coop door. The Rpi & controller is 5v, the motor is 12v. This has been powered by around 50' of extension cord, but the elements are beginning to weather the cord & we also need to move the chickens further away from our mains. I think it is time to implement solar. I aspire to assemble a PV, battery, & converter system which:

• Uses an off-the-shelf 12v PV panel (30w or so)
• Uses LiFePO cells for heat resiliency & stability
• Provides both 12v & 5v power
• Isn't proprietary; uses standard, easily-sourced components... unless it meets specs perfectly & isn't terribly expensive.
• Minimal power draw; at most 2 amps @ 12v for 10 seconds twice daily.

Does anyone have suggestions regarding this configuration, know of a post, blog, or video which does something similar, or is willing to ID components you'd recommend for this project?

The Renogy Wanderer states that it is optimized for 10A, 12V/24V batteries. What would happen if it was connected to a battery pack containing one 3.6V 18650 battery such as this?

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Hi everyone, had anyone played with alternative battery technology to try and bring the cost of storage down when weight and space are not an issue? Zinc bromine? Nicole iron?

As my first foray into Solar DIY, I'd like to try to power a 5V computer fan with a solar panel. My goal is to run it for at least several hours per day. My understanding is that I'd need the solar panel (duh!), a fan, a charge controller, and a battery. As a newbie, I'd like to run my setup by this community since you know better than I do. Please let me know if this makes sense:

Steps:

1. Strip end of solar panel wire and attach to charge controller
2. Connect micro USB cable to battery bank and strip the other end to connect to charge controller
3. Strip end of computer fan and attach to charge controller

Parts:

1. 10W, 5V Solar Panel:
   https://web.archive.org/web/20231107180209/http://web.archive.org/screenshot/https://www.aliexpress.com/item/1005004587476483.html?spm=a2g0o.productlist.main.3.72bbaAk6aAk6KS&algo_pvid=4fe1d766-427c-4c24-978d-094fb385b2b9&algo_exp_id=4fe1d766-427c-4c24-978d-094fb385b2b9-1&pdp_npi=4%40dis!CAD!39.69!17.07!!!28.30!!%402101fb1116993792757332890e8301!12000029732119781!sea!CA!177099580!&curPageLogUid=tN1l84mY50ZP

2. Spare cable that terminates in micro USB

3. 10A Solar Charge Controller:
   https://web.archive.org/web/20231107180717/http://web.archive.org/screenshot/https://www.aliexpress.com/item/1005005210165491.html

4. 5000mAh, 5V 2A Input, 5V 2.1A output Battery Bank (one I have laying around similar to this):
   https://web.archive.org/web/20231107175655/http://web.archive.org/screenshot/https://www.aliexpress.com/item/4001322867876.html

5. DC 5V, 0.75W, 0.15A fan (also a part I have laying around)

Sorry if this is a wrong community to ask these question since my system is only partially DIY, but does anyone have experience with EPS systems like EcoFlow Delta?

I'm trying to figure out exactly how it works when all 3 sources of power are available: battery, AC and solar. Is it able to use them in combination if solar doesn't provide 100% of demand?

And if anyone is using UPS units, how are you dealing with lack of ground? I'm thinking of daisy chaining UPS to EPS to avoid sensitive equipment from shutting down during failover, but I'm concerned that UPS will not like operating without ground.

I’m starting to design a quite large solar pergola, to be built in the southern uk. Has anyone got any advice on the different methods of adding waterproofing between panels? And/or any general tips or experiences in constructing the pergola?

Has anyone here ever had success running either of these in a solar-powered off-grid structure?

I've seen and read several sources/product reviews that advise against using each of these (especially incinerating toilets) with a solar setup, but I've heard anecdotes from a couple of people who used a dedicated solar panel for a mini-split and had no problem.

I think an incinerating toilet is the best option for my location, but I'm not sure if I can swing it off-grid.

(Cross posted in !off_grid)

I have three extra solar panels from a pack of 10 I ordered. I don't have room for them to fit with my other 7 panels and am looking for unique ideas on where to put them. I could throw them up on my east facing roof, or perhaps on a large playhouse in the back yard. I could lean them up against a south wall, or mount them to a railing. Any other crazy ideas?

I'm looking to build out a semi-off grid system for a cabin. I have a 2000w generator I'd like to use to feed the inverter/charger to assist with the battery charging. The datasheet indicates that it'll draw significantly more current than the generator can provide. Can the charge current be adjusted down in software? I see recommendations for buying a standalone AC charger, but that seems silly. I'm looking at the GroWatt SPF-3000 unit.

Will Prowse just posted a video on his DIY Solar Panel YouTube Chanel on installing a Mini-split HVAC system. He goes through the steps of installing one similar to one I installed in 2014. I paid around $678 for the unit with the intention of installing everything and then having a HVAC company charge the lines. I got busy and lazy and ended up hiring a company for $900 to do the install an setup. But had I known that you don't have to charge the lines, just pull a vacuum on them, I WOULD have made the time to install it myself! I will be installing a second unit in a year or so and was planning on going with Mr. Cool, but if there is still a large price difference, I will go with another Pioneer. So mine has been running for 9 years now, it peaks at 1,000 watts at start up and then pulls just over 500 watts when running.

What exists right now for someone who wants to make a very small solar project?

A family member of mine was hoping to put 1 or 2 panels on the roof of their ADU to power maybe just the small window air conditioner in it, or at least offset a lot of its energy use. Is there anything practical for doing this that doesn't cost multiple thousands of dollars?

In my imagined setup, there would be 1-2 panels on the roof connected to a cheap consumer battery (something like a small ecoflow). The appliance would try and run only off the battery, but if the battery charge level dipped to low it would have some controller that would switch it to grid power until the charge level was back up. I would not want to feed any power into the grid, but I wouldn't want the person living in the space to have to manually switch the power source between the battery and a regular outlet.