diy solar

diy solar

I really like the new powerpro battery..

Which battery is best bang for the buck? ?
Haven't checked prices, lately. It depends on what is on sale.
Isn’t there a lot more wiring involved with two inverters?
I wouldn't call it a lot. But yes, more too it.

When would I hook up my grid to receive power but not supply back to the grid? Generator?
The 6kxp is an off grid AIO. (It can't export)
There are separate connections for AC input and output.
 
Hello brand new here. I will be buying a eg4 18k inverter. My big question after seeing your new battery video is. This is my first system and really want to buy the best for the money. Which would you suggest buying the eg4 bundle with eg4 30kwh batteries. Or eg4 18k with 2 eg4 power pro batteries 28kwh? Or the eg4 with the Ruixu 30kwh server rack? Thank you so very much in advance
I went with 2 18kpv’s and 6 power pro batteries. Completely off grid and very happy with the setup.
 
I wish the made it so they could easily be put one in front of another and attached to each other...and allow the wiring to run between the side compartments. Otherwise they consume a LOT of space left-to-right if they need to be screwed into the wall.

Also, the terminals being on opposite sides is a bit tough...I wish there was more room to allow them both to be on the same side.
I have one. If you had them stack one in front of the other, your wall would fall down! These things are freaking heavy!
 
Generally speaking your minimum battery size is just enough to get you from sundown to sunup, but with lifepo4 there is really no maximum size. If you want to be able to have power for a week with no sun, you could do that. There is also a minimum size in terms of your peak load (each server rack battery can only support 5kw of load, basically) so if you try to run 12kw of load youd need at least 3 batteries, etc. So there are minimums but no real maximum on batteries.
 
Hello brand new here. I will be buying a eg4 18k inverter. My big question after seeing your new battery video is. This is my first system and really want to buy the best for the money. Which would you suggest buying the eg4 bundle with eg4 30kwh batteries. Or eg4 18k with 2 eg4 power pro batteries 28kwh? Or the eg4 with the Ruixu 30kwh server rack? Thank you so very much in advance
It's purely $$$ and cosmetic's. If pretty matters (sometimes it really does!), then the pretty ones are more expensive per kwh, but produce a very neat and clean appearance. (See Markus' install, looks phenomenal on an outside wall). I think the EG4 Lifepower4 battery itself is marginally better than Ruixu, but the cabinet in the latter is much nicer and presents a much lower profile for 6 batteries and is slightly less expensive. Both work equally well with the big EG4. If you don't care about mounting pretty batteries on a wall, get one of the racks, better bang for the buck. If you want to make sure the system is fully single vendor integrated, run with the EG4 batteries, If the $500 is more important grab the ruixu's.

Last note, the EG4 rack is pretty darn tall, a good 8+ inches taller than the Ruixu. I measured down from my roof to mount my EG4's. I can push the Ruixu units under my inverters, the EG4 cabinets set up too high. Take some measurements before you decide. Double the check with the Pp's.
 
Is 12kwh of solar and two eg4 6000 inverts enough for 30kwh of batteries?
If you have two pie pans and a small oven is that enough to make pies with a bushel of apples?

Once you get past meeting the maximum draw rate on the batteries you are buying time. How much do you need/want?

There are lots of threads discussing this. It's a reasonable starting point. IMNSHO, you can never have too much battery, you need enough inverter output to meet the highest possible demand you will hit it with, and you need enough PV input (in KWH) to meet your average daily use plus a percentage more at least 20% to cover bad days and conversion losses. Kind of depends on your target desires.
 
I've got my server rack batteries, admittedly only 3 of them so far, in a full size server rack that will be able to store up to 10. It has wheels on it so it can move around, and nicely encloses everything. it's 7 feet tall so it's just small enough to get through my garage door but really maximizes space.

I think the EG4 rack isn't making use of the potential benefits of a server rack. It's not all that tall, and you have to mod it to put casters on it or double stack it.

Where neither it or the new 280Ah battery is really optimizing is storage within a certain footprint. How well can you stack the new batteries? Seems like a chore.

If I had to do it again, I think I'd still go for server rack for expandability and maneuverability.
View attachment 162390
I like your rack saves space and looks great. Where can I get 1
 
I know the cells are permitted to be on their sides, but not a fan of this, I like the cells upright.
This is kind of an anal thing for me as well. The most likely place for a problem in a battery case is around the seal points. Since the case is a plastic bucket with a seal around the top, should the seal fail, you minimize the leakage if you keep the bucket part upright. I've had a couple of issues with oozing electrolyte on (smaller) side mounted cells damaging cabinets and other wiring. (Gel cells in alarm/access panels to name one). In a perfect world it's not an issue. It ain't a problem, unless it's a problem.
 
Seeing those welded busbars just reminds me that you will be in a world of hurt if you have to send one of those back because something isn't working right.
Is it me, or does it look like the BMS is fixed in the install - the angled bus bar is welded to the BMS, right?? That seems smart from a MFG perspective, but crazy from a servicing perspective.
 
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