Good job! What will be your total kWh capacity when all the batteries are installed? Are you willing to part with that Puredrive battery yet?
Also, what monitoring app are your using? I've a Solis inverter as well, but the app I was given is nowhere near as fancy as that.
Nice work, well wear. Would you mind telling me the spec on those and where did you get them?
That app is the Solis app. There are 2 Solis apps available Solus Cloud and Solis Home. That one is the Solis Cloud app.
The two batteries will be 9.6kWh which should be enough for now.
I'll be parting with the PD alright and just want to check back that I didn't get a message about it from another boardsie, I'll PM you about it.
The app is the soliscloud one and has a good bit of info when you drill down into the various sections. There is an older app called solishome.
Virtually all the inverters have an app of some description to show you the telemetry of what's happening in the system.
All of what you say is possible, without having to write sophisticated custom automation. You can set charge/discharge times on your battery so that it only discharges during day time rates, where it's needed of course. meaning that you can charge it via the solar panels from say 8am to 7pm, and then when it's dark, the battery will keep you going until night time rates kick in (midnight in the summer)
Cheers, please let me know if it's available. I've managed to track down a wholesaler that supposedly supplies them, but every week I ring about ordering one, the date they're getting them in is pushed out another week....Very frustrating....
@THE ALM You really should use the default option to specify the battery type. This is really for Lead Acid's, for the inverter to "guesstimate" the SOC%. You really want the inverter being dumb and learning everything from the BMS of the battery modules.
Anyone got any experience with Seplos DIY battery kits?
They're basically a battery module without the cells. It looks like it includes all the fittings and a BMS, so it seems like a reasonable deal at $600, although I expect the end user price is a bit higher
They've got a few different options, I think the one I linked should fit the CALB 280Ah cells. I guess you could use smaller cells but you'd need some padding between them
No default option selectable, with the Solis manual and battery manufacturer both stating to select 'User Defined' and input battery parameters.
I'll chase up when the battery will be added to the Solis firmware but all seems to be working well with both the battery and inverter displaying the same readings.
So $600 for a fancy box ???
My apologies, I meant User Defined. That is generally for Lead Acid's when you don't have a BMS. The power curve of Lead Acid's is quite different to LiFePO4's.
I expect you have connected the BMS to the inverter, but it will be doing absolutely nothing.
The BMS should tell the inverter about the voltages and the cell capacities.
Did you try various battery types on the inverter, to see if one worked ?
I'm only saying all of this because I started with a HEYO / DALY BMS. The inverter was all over the place with guessing the SOC%. I was really only getting to use about 70% of the batteries capacity. The Seplos changed everything
Just to clarify on the solis it's different
Solis user defined is not the same as the sofar default mode. The solis still uses the can connection in user defined for SOC.
There is a separate battery option for lead acid.
I'll keep an eye on it and check the readings on the inverter and the battery bms to see how they tally and see what battery capacity we are seeing with the charging and discharging.
Sent a request to Solis to see what they say.
Well it seems to include a $200 BMS plus some accessories, so probably $300 for the fancy box
Just ordered 4 of these Seplos kits but the BMS is on back order so hopefully not too much of a delay.
Got fed up waiting on supplies of off the shelf batteries so decided to go down this route after watching Andy's experiences on the Off-Grid Garage YouTube channel.
With the different inverters it is hard to keep up with the different settings. With the Solis my understanding is as you describe with communication between the two.
Actually I just watched his video of assembling the 48V kit
https://youtu.be/igO3Q8lK7H0
Looks like a well made kit, but I really hope they've improved the packaging.
The kit he got didn't have any manual or documents and the bag of screws wasn't properly held in place and ripped open, spilling all over the inside of the kit
I need to watch the follow up video to see how he got past the BMS communication issues
They have taken on board these recommendations and they have been shipping with parts inside cardboard boxes now.
Andy got the BMS configured but he has different BMS boards in each of his builds and so cannot run both in parallel, he would need a Canbus BMS for the 280Ah build, no idea why he was sent a BMS without Canbus as they default now to Canbus boards unless asked for the RS-485 board.
https://youtu.be/nnXLCB43FRE
Fingers crossed they deliver good kits though, could be up to 2 months for delivery.
Good to hear, let us know how you get on with the kits, I'm considering getting a couple myself
Seplos are a bit of a weird company it seems. They seem to be trying to act something like a parts manufacturer, and get local distributors to handle the customer support side of things
They seem to get dragged into being a consumer focused company though, and I think they're still building up the support side of things to match
In general their stuff does seem good, I like how they're trying to build in some features for DIY users that you'd only see on the expensive batteries
I looked at them earlier in the year as I have the EVE cells they are designed for. Was about 1300 for a pair with all cables, pair of BMS, shipping, customs etc
They do look good but pricey
How big is the battery you're building if you need four of these?
Each should be good for about 13.5kWh so x 4 = 54kWh.
Jaysis, you going off grid?
54kWh is an EV sized battery. I'm not at all jealous, not even a tiny bit :) https://media.giphy.com/media/57x4ApyRzkI1y/giphy.gif
That better be paired with at least 30kw of panels 🤣
Next powercut, party in sligobuck's gaff, it will be the one with the lights on
Okay, time to start an argument 😁
PWOD store vs OYE store, what's your opinion?
They each seem to have people saying they're great and folks saying they're scam artists
From what I can tell PWOD is more expensive generally, so maybe that's a sign that they're ripping people off or a sign that OYE is selling second rate garbage.
Kind of hard to tell when both their stores look mostly the same and they're selling generic looking blue lithium cells
What has your experience been?
I used OYE following successful purchases by 2 others here. Delivery was miserably slow but that's life. Other than that, no issues.
Have a look at the ratings for PWOD official store. That will say it all. I wouldn't buy anywhere else tbh
While people feel that they are one and the same store, I'm not convinced.
I bought my first set from OYE but every time there was an issue raised by someone, it always appeared to be with them.
So for my recently purchased and delivered second set, I was happier to go with PWOD.
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