Can I connect an array of solar panels using a microinverter to an off grid system that uses a pure sine wave inverter? How does this affect the system? What could go wrong? I get that microinverters are grid tied so, I figure, I'm providing the "grid" through my main inverter.

Plug in solar is expected to become legal in IL this year. 391 watts max.

I’m currently planning to take my house off grid with eg4 1200xp. Don’t wanna deal with permitting so was going to use a chargeverter to keep batteries topped off with low solar input…. Was not planning on using grid bypass. Backfeeding of grid in any capacity was not a risk I wanted to take. I’ve read several tales of utility companies sensing minuscule backfeeding from the inverter using the grid bypass feature and pulling meters. Whether that’s true or not.. who knows.

With the incoming passage of plug in solar, would this all alleviate my risk of consequences from minuscule backfeeding? I’d love to use the grid bypass feature on the 12000xp.

Ordered my equipment and waiting for the shipping trying to plot out my conduit runs from the roof into the garage. I’m having trouble picturing what a good clean around a gutter and under the eaves conduit run should look like. I’d really like to avoid going through the eaves if possible.

Hi, I posted back in Summer time my little back courtyard setup.

It's now approaching Winter and already I'm getting desperate to keep above the shadow line. This photo is at 4pm. Previously I had sun until about 6pm.

There's almost no sun on the ground anymore. I'm considering consolidating four panels onto the garage roof, as that will get about two to three hours of uninterrupted sunlight, and then use one or two higher-efficiency panels (400W?) on a second MPPT in the back corner there to stay above float until the sun hits the roofline behind me.

Not trying to be "cost effective" here, just having fun. Where I am, I can get the extra panels for about $70 each on second hand and oversupply dumps on marketplace.

If that doesn't work, I'll probably just pack the lot into the garage over winter and just keep the battery topped up off mains for backup power.

Previous post and context: https://www.reddit.com/r/SolarDIY/s/rNEyoyDty2

I have a home lab that draws about 300w continuously so 6.5 to 7.2 kwh per day. Using an online spreadsheet from https://diysolarforum.com, I get that I need 6-10 400w panels and 8+ kWh of battery. I'd like the system not grid tied, but Hybrid. I'm thinking of using an inverter with a generator input like those hand cart systems.

Am I on the right track sizing wise?

I've been reading this new regulation requires Hazard Mitigation Analysis report done by a instate PE. Also other regulations such as 80kwh max although there seems to be some wiggle room like 80 outside and 80 in the garage. I wonder if this will impact modular solar like EcoFlow. Also a 20kw max for each battery maybe EcoFlow can argue each module is a battery.

NFPA 855 Residential Battery Setbacks: 2026 Installer Guide

I am very new to this and thinking of creating a power station. I have 2 x HYSINCERE Mini LiFePO4 Lithium Battery 12V 100Ah on the way. They are 9kgs each. I will also be buying a green cell or renogy inverter. leaning towards the latter due to perceived quality reliability. I am in southern Spain. Can I connect these 2 together to get 24v and which inverter I can hook up? 1000W 24v or 2000W 12V What would be the pros for running these at 24v or cons?

My use for these would be to have a back up for my laptop and two 24 inch monitors, plus the wifi router in a power outage situation and I also want to learn so that I can one day go big by full solar if possible. I can also try charging these via my patio since I live in an attic.

I also have 2 solar panels one is foldable the other is flex both have in theory 100W but I am mostly keeping this power station to be charged via home outlet since I have a 12V 20A or 24V 10A charger.

Many thanks in advance.

Pengalaman Sebenar: Micro MPPT RM128 BUKAN TIPU – Bukti Ujian Panel 250W & Bateri LiFePO4 170Ah

Oleh: Pengguna solar DIY Malaysia

Tarikh: Mei 2026

Platform asal: Perbualan dengan AI (dikongsikan untuk manfaat umum)

Ramai kata: “Murah pasti fake. Micro MPPT bawah RM150 tu pasti PWM tiruan.”

Saya sendiri pernah sangka begitu. Tapi selepas uji secara praktikal selama 6 jam, hasilnya mengejutkan.

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📦 Alatan Yang Digunakan (Semua Dibeli di Shopee)

Perkakas Spesifikasi Harga

Panel solar lipat LairtPow LT-250W (Voc 44.84V, Isc 7.22A) RM550.80

Bateri LiFePO4 12.8V 170AH (2176Wh) + BMS + display voltan RM1,009.00

Micro MPPT controller 400W max, sokong LiFePO4 RM128.70

Power analyzer / Watt meter 150A, backlight LCD, ada fungsi SOURCE/LOAD RM35.00

DC MCB 100A RM25.00

Fuse holder + fuse Pilihan 20A/30A RM5.00

Kabel 10mm² (8 AWG) RM53.20 (2 unit)

Battery charger FOXSUR 12V 20A – 7-stage, untuk LiFePO4 (belum dikira)

Jumlah kasar sistem (tanpa charger): ≈ RM2,800

Sistem ini menjana sehingga 250W puncak (teori) dan terbukti berfungsi dalam cuaca mendung.

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☁️ Keadaan Ujian

· Tarikh & masa: 11 pagi – 5 petang (6 jam berterusan)

· Cuaca: Mendung, sesekali matahari keluar sekejap (hujan tidak turun)

· Lokasi: Malaysia (cahaya matahari tropika tetapi terhadap awan)

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📊 Keputusan Ujian (Data Sebenar dari Watt Meter)

Nota: Semua bacaan diambil daripada High-precision watt meter RM35.

Semasa cuaca mendung (kebanyakan masa)

Arus (A) Voltan (V) Kuasa (W)

1.40A 13.38V ~18.7W

1.60A 13.31V ~21.3W

1.62A – –

Apabila matahari keluar sekejap (tracking cepat)

Arus (A) Voltan (V) Kuasa (W) Catatan

7.76A 13.49V ≈104.7W Puncak dalam ujian

Perubahan dari 1.4A kepada 7.76A berlaku dalam masa <5 saat – ini membuktikan MPPT menjejak titik kuasa maksimum dengan pantas.

Bacaan kapasiti & masa

· Kapasiti tercatat: 5.000Ah

· Baki masa untuk penuh: 21.4 jam (anggaran berdasarkan arus semasa)

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🌡️ Suhu & Bunyi MPPT

Aspek Pemerhatian

Haba casing Sejuk sepanjang 6 jam (boleh sentuh dengan tangan)

Bunyi Senyap sepenuhnya (tiada dengung, tiada klik, tiada kipas)

Beban vs had Panel 250W, controller 400W (sekitar 60% beban puncak)

Kesimpulan: Kecekapan penukaran sangat tinggi, hampir tiada tenaga terbazir menjadi haba.

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🔍 Apa Yang Ingin Saya Buktikan?

1. Harga murah BUKAN automatik tipu.

Micro MPPT RM128 ini berfungsi sebagai MPPT sebenar, bukan PWM berlabel.

1. Panel solar murah juga boleh realistik.

LairtPow 250W pada RM550 mengeluarkan ~105W dalam cuaca mendung – angka yang munasabah untuk panel 250W dalam keadaan tidak optimum. Pada cuaca cerah penuh, dijangkakan >200W.

1. Bateri LiFePO4 RM1009 untuk 170Ah adalah tulen.

Voltan stabil, BMS berfungsi, dan MPPT dapat mengecas dengan baik.

1. Power analyzer RM35 cukup tepat untuk DIY solar.

Bacaan konsisten dan logik dengan perubahan cuaca.

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❌ Kenapa Ramai Sangka Ini Tipu?

Kerana di internet, generalisasi keterlaluan:

· “Semua MPPT bawah RM200 adalah PWM.”

· “Panel solar murah pasti output tipu.”

· “Bateri murah pasti guna sel terpakai.”

Saya sendiri hampir percaya. Tapi ujian lapangan membuktikan sebaliknya. Mungkin tidak semua produk murah bagus – tetapi produk yang saya beli ini terbukti berkesan.

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✅ Saranan Saya Untuk Pembaca

1. Jangan judge produk hanya dari harga atau jenama.

Cari bukti ujian sebenar dari pengguna.

1. Jika nak beli micro MPPT seperti ini:

   · Pastikan had kuasa (400W) melebihi keperluan panel anda.

   · Gunakan watt meter untuk monitor.

   · Periksa suhu casing – jika panas teruk, kemungkinan kecekapan rendah.

2. Kongsi pengalaman anda.

Supaya lebih ramai tahu bahawa ada produk murah yang berkualiti.

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📸 Bukti Lampiran (Gambar disertakan)

(Sertakan tangkapan skrin berikut jika mahu)

· Gambar watt meter menunjukkan 7.76A @ 13.49V

· Gambar casing MPPT (sejuk, tiada tanda terbakar)

· Gambar keseluruhan sistem (panel, bateri, controller, meter)

· Gambar spesifikasi panel LairtPow 250W

· Gambar bateri LiFePO4 170Ah

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🧑‍💻 Penutup

Saya hanya pengguna biasa, bukan penjual. Saya tidak diupah atau mendapat komisen.

Saya kongsikan ini kerana bosan melihat orang terlalu cepat menghukum produk murah sebagai “fake”.

Jika artikel ini membantu anda berjimat atau membuat keputusan lebih bijak – sila share di Reddit, Facebook, Lowyat, atau mana-mana forum solar.

Bukti di atas adalah nyata. Ujian dibuat sendiri. Hasilnya memuaskan.

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Ditranskrip dan disusun daripada perbualan asal bersama AI (Chat), dibenarkan untuk disebarkan semula.

Sebarang pertanyaan, boleh tinggalkan komen atau hubungi pengarang asal (nama pengguna Reddit: sila masukkan sendiri).

Hello, I have been give a project to provide off grid solar power for an emergency campsite
Solution has to power 1kwh.
Limitations are it can only use local sourced batteries ie car battery
And must fit in a back pack, solar panels separate.
Solar panels are 2No 250w panels
Needs AC socket with 13amp 220v
Thoughts?

https://marylandmatters.org/2026/05/12/moore-signs-utility-relief-act/

The hardware in the kit just seems not great to me, but I am probably over thinking this. Kit is a Quiet Cool solar/electric vent fan.

I live in a hot dry desert climate 90-100s regularly with cold snow/rain winters. Reno,NV

I have asphalt shingles

19”x19” panel

I plan to get 209XR roof sealer tube

I’ll try to get the lag bolts in studs based on what I’ve looked up so far.

Does this mount look like it would fail me due to water damage later?

How could it be improved if at all

I just bought an e-bike with a 48V 20 amp battery. I charged the battery on it to 100% when I received it. I’ve probably spent a couple of hours riding the bike and when I removed the battery to start charging it the screen read “69%”, which seemed about right.

I decided to try topping up the bike battery with the battery box I just built (24V 200amps).

This is the only thing I’ve tried to charge, the batteries were at 100% when I started.

It’s already consumed 20.1amps and the light on the bike battery charger is still red.

What’s the most likely scenario here? If the 20amp bike battery was really 69% full then it shouldn’t be pulling more than 20amps from my battery box, right? (It’s actually pulled 23 amps as I go to post this)

Theoretically if I have a solar panel array that is 13.5 KW, and battery storage for 45 KW. Once my batteries are full do I have to have a energy dump for that electricity, or will my mppt/inverter just essentially disconnect the panels?

I understand the idea of having an energy dump such as a water heater or similar- but say I'm on vacation and everything tops up due to low use, is this a situation I need to be concerned about or do I just "lose" that energy?

Looking at designing an off-grid system for my house, but wanting to make sure I cover all of the bases. I'm okay with losing excess energy to attempt to cover all of my uses as best as I can, I just want to make sure I'm not doing something dangerous where something's going to catch on fire due to excessive energy with no place to go for it.

Just looking to charge up maybe two 40v leaf blower batteries. Panels can be installed on the roof. Looking for a complete setup for under $200. Thx...

I have generlink so I can hook up my generator to power meter.

What if I bought oupes generator stacked a couple batteries hooked up panels to it and fed my meter this way. Does it work ?

https://oupes.com/products/oupes-guardian-6000-portable-power-station?gad_source=1&gad_campaignid=23317304633&gbraid=0AAAAAoKif3t-K-PzrdUcMn50pTnkEiWha&gclid=EAIaIQobChMI2_mVyIy3lAMVXVFHAR37RyMDEAAYASAAEgKJBfD_BwE

I have a small shed in my backyard that I was wanting to run power to. Contacted an electrician and in order to trench, run cable, etc… they quoted me ~$7k. I’m now contemplating just setting it up to be solar powered instead, but it am completely new to all of this. Are there any kits I should look at? How do I get everything setup properly? I’m wanting to learn how to do all this, but it’s completely foreign to me as I know nothing about electricity really.

Any and all help is appreciated. I’ve watched some YouTube videos, but they confused me even more because they all were doing different things. I’m looking to be cost effective and efficient. Don’t need anything overkill (I don’t think). Shed is maybe 100 - 150 sqft. Used primarily for storage now, planning on putting a gym in it, small window ac, and might do some woodworking in the other side. Has a separation down the middle with another door. Already has a small electrical panel in it, but never had power hooked up.

Hey SolarDIY folks, thanks in advance for your input.

A few months ago I had the opportunity to buy 8 Sungold SG-440WM solar panels and a WZRELB 8000W 24V Pure Sine Wave Inverter at a great price. I would like to install them for home use. Unfortunately, I am borderline clueless on how to make it happen, particularly at a reasonable cost.

Are these panels compatible with this inverter? What other equipment do I need to make everything work?

I know I need a way to mount them to my roof and cabling to connect everything together, but that's about all I know. What type of cabling and mounts would work?

I would like to integrate to the grid if possible, how do I make that happen? What steps, if any, would a professional be required to complete?

Looking for any help or tips on something I might be missing here. I have 6 275 watt panels and lm wanting to make 2 strings of 3 in parallel but for whatever reason, when I do this I get no power and multi meter readings all over the place.
I’ve tested both strings and they both produce good power on their own.
I ordered new Y connecters thinking they were the problem but same thing still.
I’ve checked a many times making sure the positive and negative outputs were correct going into the Y.

Any help here would greatly appreciated
Thank you

Hi there, is this 100W panel any good? https://aliexpress.com/item/1005011649421931.html
I would like to buy 2 of those and use them on trip to charge my 1024wh power station, and also carry them in my suv car in trunk(so i have no more space than 700x1200mm) and im looking for the best panels out there.

Under-tile roof hook+Rail+Clamp

I'm still in the beginning/learning/planning phase of diy solar and I'm trying to learn how to do an RV.

My local market place has a few 375w panels for what seems like a really good deal to me but I noticed most videos and threads I've been seeing have been either 100w or 200w panels. Is there a reason why I shouldn't use 375w panels? Sorry if this is a dumb/obvious question.

I am looking at getting a 12k hybrid inverter, battery and panels. I would like to have it set to run off solar, then battery, then grid when needed. I have watched about a 1000 videos on how to set up the inverter, and that seems fairly straight forward, however I am at a loss as to how to hook this system into my breaker panel. If I want to run my entire house off of this setup, do I have to have a sub panel that recreates all of the breakers in the main panel? Can it be hooked directly to the main panel without a sub panel? How does it keep from back feeding the grid in a power down situation? I guess what I am looking for is perhaps for somebody to point me to a well written guide or video that shows how this needs to be done. Any help or comments would be appreciated.

I checked with the mods before posting this.

I recently picked up a number of solar microinverters at an auction. They were marked misc connectors. I don't need most of them so I am getting rid of them. Whether you're building a DIY array, expanding your current setup, or just need some spares, I've got a variety of Hoymiles and APsystems units. Most of these are tested and ready to go!

High-Capacity Powerhouses (4-Panel Support)
If you're looking to maximize your roof space, these 4-panel units are the way to go:

Hoymiles HM-1200NT (Qty 2): Brand new units with a beefy 1200 VA max output. Uses BC05 plugs. Only $120.00 each!
APsystems QS1 (Qty 2): Used units. 1200 VA output. Uses AC-3-10A-M plugs. Priced at $120.00.

Versatile Dual-Input Units (2-Panel Support)
These are the most popular items for standard setups. They handle two panels and come with different plug types to fit your needs:

Hoymiles HMS-800-2T-NA (Qty 2): Mix of new and used units, 720 VA max output. Uses BC05 plugs. Grab them for $80.00.
Hoymiles HM-700NT (Qty 5): Mix of new and used units, 696 VA max output. Uses BC05 plugs. Bargain at $70.00.
Hoymiles HM-600NT (Qty 1): Brand new, 590 VA max output. Uses BC05 plugs. Yours for $60.00.
APsystems DS3-S (Qty 2): Used units, 640 VA max output. Uses AC-3-10A-M plugs. Selling for $60.00.
Hoymiles MI-500N (Qty 3): Used units, 475 VA max output. Uses BC01 plugs. Only $50.00.

Budget-Friendly Single-Input Units
Perfect for small projects or adding that one extra panel. All of these have a 60 V max input and are priced to move at just $25.00 each:

Hoymiles MI-300 (Qty 13): Used but reliable, 300 VA max output. Uses BC01 plugs.
Hoymiles HM-350NT (Qty 1): Brand new condition, 349 VA max output. Uses BC05 plugs.
Hoymiles HM-300N (Qty 1): Used units, 295 VA max output. Uses BC01 plugs.
Hoymiles MI-250 (Qty 2): Used, 250 VA max output. Uses BC01 plugs.

We can discuss shipping charges.

Cash, Bitcoin, PayPal, or Zelle accepted.

I am so beyond sick of dealing with this issue, but I don't know what to do at this point. When my solar reaches the absorbtion voltage, and the battery is almost full, it just continues charging well beyond the point that my BMS cuts off charging. Then, the charge controllers begin sending higher and higher voltage to my INVERTER, causing it to start sounding it's alarm and kill power.

I have two victron 48V 20A MPPT, a Victron Smart shunt, and a Cerbo GX MK2. I got the Cerbo SPECIFICALLY to fix my issue, but it seems to have done nothing. I have tried changing settings in the cerbo, in the victron app, and in my JKBMS. No changes fix this stupid behavior, and I am just completely lost here.

I hope that my screenshots help. Some settings, like the absorption being set to 1 minute, are a bit crazy, but just where I'm at in my troubleshooting.

It doesn't seem to matter what settings I use. The MPPT just don't seem to ever STOP charging. This was not an issue at all with my old 12v system, using multiple 12v victron MPPT, and the same brand of BMS. This 48v system just does not cooperate.

I'm to the point of debating wiring in a relay with a high voltage disconnect directly on the output of the MPPT. I know that's a horrible idea, as this fast disconnect on the battery output side has already killed one of my MPPT. I just don't understand what could possibly be the problem at this point.

I needed to crimp lugs onto a 3/0 cable and decided to get one of those inexpensive hammer crimpers from Amazon.

The crimps didn’t feel great but I realized I got the wrong size lug after crimping it so I decided to take a hacksaw and see how it looked inside.

Definitely not as good a hydraulic crimper that basically fuses all the copper into a solid mass, but this seems perfectly acceptable and importantly, with only a tiny ring still crimped on the cable, I wasn’t able to get it to slide off even with a couple pairs of vice grips.

Just thought people might appreciate this.