diy solar

diy solar

I really like the new powerpro battery..

Nobodybusiness said:
I was told by Global Power back when they made 400ah batteries that I have 4 of, they are just too big and heavy.
Shipping is a pain, customers can’t move them.
That why they dropped down to the 5k units.

As it is the 5ks are almost 200 lbs.

You could easily make a 30kw battery but it would weight close to 400 lbs.
Click to expand...
Once we see 400Ah cells the DIY option will be heavy for sure.
 
rustythorn said:
i think trophy battery's 15kwh battery is a better option, at least for my application, since it is lighter smaller and more capacity
Click to expand...
No comms. Connections are also more complicated. No fire suppression. 100amp rate for charge or dis vs 200. Hard to think trophy.
 
The battery is pretty cool, but I have nowhere in my house to put it. Maybe if I built a dedicated solar shed, but the cost of a sturdy enough & insulated shed would be more than the batteries & AIO. I'm leaning towards the Ruixu at the moment, but still got a bit of prep work for the house before I can pull the trigger on the purchase
 
The PowerPro battery does look sweet. I was planning to get 6 of the EG4 LL next year. But now I'm thinking 2 or 3 of the PowerPro batteries might be better. By next year, I'm hoping that any issues with the PowerPros will be identified and fixed.
 
DIYrich said:
UL9540: One rack (cluster) is limited to 20kWh (note: 4 batteries of 5.1kWh exceeds that). Each rack must be separated by 3 feet. Each location (inside, garage, outside) is limited to 40kWh.

Implies Max 120kWh at the house (40 kWh at each location). Don't know rules for Solar shed separated from the house.
Click to expand...
So I was reading through the Mike Holt book on solar and NEC and I'm not seeing anything in the NEC about an upper limit to battery storage, just the minimum of 1Kwh. Where does the NEC and the UL9540 come in when there's a conflict? Does one supersede the other or do you have to apply ALL the rules from BOTH regulatory ends?

15Kwh is a pretty small limit when you're feeding 12Kw inverters, is there any kind of guide or simplified examples you know of to help clarify all that?

As a note, my state has NEC2020, which is confusing enough, and I have no idea how the UL9540 gets involved in all that. Trying to learn.
 
NEC article 706...

but it's very interesting comparing how article 706 looks in 2020NEC versus 2023 NEC. Seems to me 2023 might be a bit more relaxed...

Free NEC access (requires account):
link.nfpa.org

NFPA LiNK®

The leading information and knowledge resource on fire, electrical and related hazards.
link.nfpa.org link.nfpa.org
 
Rednecktek said:
So I was reading through the Mike Holt book on solar and NEC and I'm not seeing anything in the NEC about an upper limit to battery storage, just the minimum of 1Kwh. Where does the NEC and the UL9540 come in when there's a conflict? Does one supersede the other or do you have to apply ALL the rules from BOTH regulatory ends?

15Kwh is a pretty small limit when you're feeding 12Kw inverters, is there any kind of guide or simplified examples you know of to help clarify all that?

As a note, my state has NEC2020, which is confusing enough, and I have no idea how the UL9540 gets involved in all that. Trying to learn.
Click to expand...
Most municipalities adopt most or all of a version of NEC with their local modifications. When NEC mentions "Listed", I think that is when UL comes into play (NEC says batteries must be "listed"). If a product is UL Listed with certain requirements (i.e. listed at 3 feet separation), then you need to meet the listing requirements. If there is a non-resolvable conflict (NEC says wire must be in metal conduit, and UL Listing testing says wire not in metal conduit), then you probably can't use it for your purpose. UL 9540A does allow for your specific situation to be tested and then be considred "listed".

15kWh is the limit for ONE RACK. You can have multiple racks separated by at least 3 feet in one location. Max in any one location (indoors, garage, and outdoors, each being considered a location) is 40kWh. Using rack batteries, you could have 3 racks, each separated by 3 feet, holding a total of 7 batteries of 5.1kW each (3-3-1,. 3-2-2, 3-2-1-1, 3-1-1-1, 2-2-2-1, etc.). You could put 35.7kWh inside, 35.7kWh in the garage, and 35.7kWh outside for a total of 107.1 kWh at one house.

If you wanted to push it, you could have 3-3-1.5 inside, where the .5 is a 24v 100ah battery that is tied in Series with another 0.5 battery in the garage.
 
DIYrich said:
15kWh is the limit for ONE RACK. You can have multiple racks separated by at least 3 feet in one location. Max in any one location (indoors, garage, and outdoors, each being considered a location) is 40kWh. Using rack batteries, you could have 3 racks, each separated by 3 feet, holding a total of 7 batteries of 5.1kW each (3-3-1,. 3-2-2, 3-2-1-1, 3-1-1-1, 2-2-2-1, etc.). You could put 35.7kWh inside, 35.7kWh in the garage, and 35.7kWh outside for a total of 107.1 kWh at one house.
Click to expand...
So if you had a 6 or 8 slot cabinet you could still only put 15Kw in there? That's a lot of wasted space. In relation to the new wall mount battery, only 2 in a room because 3 would be 45Kw? Again, that's really not much capacity.

So now not only do we need to wrap our brains around NEC2020 and grounding/earthing/that whole mess, but also need to figure out all the UL9540 conditions too?

Sigh... this is getting harder and harder with every revision. :cautious:
 
I think the key will be a rack of batteries that has been tested regarding fire. There are already listed ESS where the battery is > 30 kWh. May need additional tests to meet new fire safety restrictions.

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At least some of those parings are one some approved lists for California. Not sure exactly what standards they're listed to.
 
I would really like to know more about the heating performance in cold weather. Hard data on total daily power consumption if in 20F, 10F, 0F conditions. I see the spec sheet has 223W listed for the heater, but that's not enough info to judge performance. How insulated the box?

I'm building a cabin on my property that will be insulated but not heated and have its own 3kW solar system. I'm currently planning on lead acid due to the temps here in NH, but if the power consumption is reasonable for a full day at colder temps I'm willing to panel up some and/or do a secondary insulation cabinet to go LiFePO4.
 
I think you can get those quick fit terminals on aliexpress. I’ve seen them before. Kind of neat and would make a home built look a bit more professional.

Really neat battery overall but home built still has the lowest cost. I saw 110-120 a kWh for cells. I’d say 150 is possible after bms etc. hard to say what we will be using in 10 years. Rapid change. My l16s are about to crap the bed so I will have to make a choice. I think 15 years is pretty good for l16s.
 
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