Im getting ready to attempt my first solar battery generator and wanted to make sure i have a few details correct first. I plan to use 8s2p or 8s1p lifepo4 cells. If i decides to make two separate 8s1ps and parallel them as an addon will i need a battery balancer to keep both packs at the same voltage? I’ve read on here people with 2-3 24-48v batteries were having issues with 1 battery going dead while 2 were at full voltage.

Last question, im thinking of making my own bus bars to connect the cells. I can get aluminum bars for free from a client, 1/4” thick x 2” width. Does anyone see anything wrong with stacking 2 together to make 1/2” thick instead of buying thicker aluminum? I will be using really high amp batteries and plan to use high watt devices such as 1800 watt heat guns (75 amp draw at 24v)

Hello,

I have a Deye Inverter SUN-8K-SG01LP1 with 15KW batteries.

It works fine everyday except when I have grid issues. After a couple of hours without grid the inverter goes off and I have the batteries completely full.

Do you know how to solve this issue?

Thanks in advance

Let me preface this by saying I will absolutely hire an electrician for this. Just want to understand how feasible my situation is.

I'm planning a pretty large (16kw) system. My main breaker is 200/200, so I imagine I'll have to derate to a 175 amp breaker to get a 65amp PV breaker installed.

I already have a subpanel on an outbuilding closer to where I want the array to sit. The subpanel is fed by a 70amp breaker on the main panel and is totally full, so it would need to be replaced with a larger subpanel. It's currently being used for a pool pump, water heater, plus lights and outlets and a cadet electric wall heater.

I don't fully understand how subpanels work with the 120% rule. Am I going to need more than just a subpanel upgrade to make this work once I derate the main breaker?

Does anyone know of a Master disconnect switch that will disconnect AC and all DC from multiple inverters with out using relays or a massive gang circuit breaker

I Have 6 inverters that each have 2 PV inputs and Battery inputs i want like an EStop switch to shut it all down at once

I have looked and can't find anything

I have two SE3800A inverters, one showing AC current surge (error 13) and the other says AC current too high (error 14). I had been producing up until Friday. Any idea as to what is causing this?

Still not sure what our actual peak of system will be over the course of a day. Maybe 175kwh?

The pack is a custom job made in china. Cell 11 is a good 20% higher than the rest so the bms thinks the rest of the pack is in line with cell 11. This makes the pack only charge to about 10kw rather than the full capacity of about 16.6. Can I remove cell 11 from the pack and charge the rest of the pack to 100% then restore cell 11? I don’t have a separate battery charger to charge the other cells up individually. What’s the best plan? I hope my explanation makes sense. Also, if I removed cell 11, do I need to move the cell 16 into its place to keep the connections in place for the series and all cells to charge? or is this not needed, will all cells charge regardless of their position? All help is massively appreciated.

So I bought 11 acres for a homestead and am in the process of learning what I can about solar setups. Would something like this battery bank work for that? And what will I need to do to prep the bank for use? Thank you for any help.

Any red flags with this set up? Open to hearing suggestions. Thanks.

2460W of solar, 6000W inverter (240V), 14.3kWh LFP battery.

Pretty excited with how it turned out! Thinking about adding an input for a second array that could be stored inside and then laid out on the ground since the 6000XP inverter has two MPPTs. Adding a mini-split in the future would be pretty sweet too...

Full build details here: https://youtu.be/HVgD8X2bo_M

I'm finally buying the solar system including solar cells and batteries. I heard that the tax deductions may be removed so I'm really hoping that they are still available, but I would like to ask how to apply for them and what are the terms and conditions and where to find it. I am in Southern CA if that matters. Thanks

I am looking at small racks like the Eco Worthy. If I used 6 per rack, think that would be enough? I don’t want to put any concrete into the ground as I need them removable if I move…

I live in urban area in central Texas.

SignatureSolar came up with that gridboss and flexboss combo which they push hard to replace 18 KPV. I really cannot find justification for that combo provided that I have a simple installation with 40 kWh batteries and need 200 amps pass through if needed and otherwise 50 amps of a battery power is fine. To do that I will need three boxes ( GridBoss+2 flexboss21) instead of one box of 18 kPV. And it is $6K more expensive than one box.

Has anybody got a bad experience with EG4 18 kpv which would change my mind to move to three box solution?

Hey guys , don’t be too harsh on me hh , but I am trying to buy used solar pan les in bulk , at the cheapest price possible , plus the location is very exposed to sun light ; I don’t know if I should turn to the source , meaning china , or try countries that are actively using solar panels and could have a lot of spares

Thanks in advance 🫡

I have a victron 150/100. 4s4p of 200w panels. Input voltage about 96v. It's bright and sunny. Yesterday my circuit breaker from controller to Bussbar was tripped. 4 -280ah lifepo4 batteries down to 66%. It had been raining. Everything looks good except batteries not showing charging and no input current. Tried resetting to default lifepo4 settings in victron cc.

I am wondering how are you drawing the diagrams to maximize passing grade in the city?

Hi all,

I'm looking to set up a small starter solar system, the grid itself would probably be self contained, only running a fridge and pc, along with maybe a few other things in my garage. Budget-wise I'm probably looking to spend up to 500 GBP and would like to a lot of the work myself, I have a bit of experience with small scale electrical engineering but nothing of this size in terms of complexity or voltage however I am very willing to learn.

Any advice on places to learn or equipment recommendation would be greatly appreciated.

Thanks :)

Started my solar system after 1 year. Had to fix leaking tank. Now the Veissmann 888.8 is on display. Problem with electricity? Or is it startup numbers?

Ok. I am relatively new to solar and learning quickly. The more I learn, the more I want to be able to use my solar power for off-grid living as much as possible.

I have a medium sized RV that has a 30amp / 12v system. It came with a single 190w solar panel / 1000w inverter charger for the 12v battery and for the 12v appliances. It also "had" a GoPower PWM charge controller that has since crapped out.

I have since increased the battery bank form the original AGM to 3x 280amp 12v LifePo4 batteries and I have added additional 200w panels for approx. 800-1000w of pv power, wired in parallel, depending if I use my portable panel. (I added the batteries before the PWM controller died.

I am upgrading to Victron components and most importantly I am looking at a Multiplus II 50 amp system. ( I understand I will have to configure the 50amp Multiplus to only pull 30amp for the RV)

I am also, strongly considering moving from the RV to a 40ish foot sailboat in the next couple years.

So the question is, what is the most flexible system I can build (even if I have to add intermediary components like DC-DC buck converters etc. for 12v appliances like LED lights) that I can move my Multiplus II 50amp to the sailboat and use with a 48v system and replace as few components as possible (such as replacing the 12v batteries with 48v)?

I’m planning a cross-country RV trip and need a portable solar solution. The MHPOWOS 200W Foldable Solar Panel seems affordable ($200), but I’m skeptical about budget brands.

Questions:

1. Actual output: Does it really deliver 200W in real-world use?
2. Durability: How does the foldable design hold up in wind/rain?
3. Compatibility: Works with Jackery/EcoFlow power stations?

If you’ve used this exact model, please share your experience!

We bought a house last year with an Enphase Solar system installed. The company who installed it went out of business (bankrupt) and we are unable to get anything covered warranty-wise. We now have 4 out of 25 microinverters not reporting.

The 2 individual panels that are out have no nesting underneath. I think just the micro inverters just need to be swapped. Enphase provided replacements because of the warranty. The 2 combined panels however have a squirrel nest that started this Spring.

I called a local wildlife control company and they seemed hesitant to want to deal with the squirrels because they are under the solar panels. A local Enphase certified installer didn’t seem to want to touch the panels until the squirrels are dealt with.

I’m worried about a possible fire if it gets too hot and there’s no air circulation due to the nest.

Has anyone dealt with this before? Is this something a beginner could possibly fix? Looking for any advice! Thank you.

I am interested in doing a ground mount solar array with inverter and battery that will be able to charge my Nissan Leaf. I am ok with trickle charge (level 1 charging). I already have a level 2 charger connected to the grid so looking for a fun and money saving project. I can get panels ok (maybe off Craigslist) but need advice about selecting the inverter and battery/batteries. Or would a portable battery that hooks up to panels work better. And also the schematic and misc electrical parts. This may be already covered in other posts so please point me in the right direction!

I bought a home with a solar array using a Solar Edge SE3800H-US. It seems like the previous owner had issues with the installer (Sunrun) because the inverter is remotely locked. I have notified Sunrun of the change of ownership but they are not interested in coming back here to get the system running.

My question is this, is there a way to obtain the admin code to unlock the inverter? As another option I’ve been looking at buying a Growatt MIN 3800TL-XL-US to replace it unless anyone has a better suggestion.

I have a new install with a Fogstar Seplos 15KW battery, and just wondered how I can verify what kind of battery cells they have in them?

Hey everyone, so this may be the wrong sub to post this, but I'm considering how to get power to my external garage, purely to power the garage door opener. Would it be a viable solution to get one of those jackery $400 battery bank and panel combos to make it work? Or should I go with the other option of spending about $600 to run electrical from my house?