shadowmaker
Solar Addict
Really hard to tell for sure as I don't have panel specific data collection, but that string of panels is comparable to other strings, so I think it's OK.
My 44kW vertical and bifacial set in Finland.
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shadowmaker
Solar Addict
February was good at first and then sun went away. A little over 2,2MWh produced, 2,7MWh predicted by PVWatts.
Measured shed roof and it seems I can fit 28 panels instead of 26. So 15,4kWp instead 14,3kWp. Luckily my friend has few extra of these same panels.
Measured shed roof and it seems I can fit 28 panels instead of 26. So 15,4kWp instead 14,3kWp. Luckily my friend has few extra of these same panels.
shadowmaker
Solar Addict
240kWh yesterday, 260kWh today and it's going to be the first day of the year with no purchased electricity. 
Day is almost 11 hours long already and getting longer fast.
Day is almost 11 hours long already and getting longer fast.
shadowmaker
Solar Addict
317kWh today. Fresh snow, but only -5C or so. Around 9 it was already making 40kW and from 10 to 12 it clipped at 48kW.
Deye with 12,01kW + 12,09kW AC coupled. Loads and grid sell doesn't add up because there's two more inverters at play too. Don't know if AC coupling is also restricted to ~12kW, but it stayed there for two hours.
Deye with 12,01kW + 12,09kW AC coupled. Loads and grid sell doesn't add up because there's two more inverters at play too. Don't know if AC coupling is also restricted to ~12kW, but it stayed there for two hours.
Nah, those are marshmallows - ready to harvest I believe.
shadowmaker
Solar Addict
Bought a Battery Bank Manager System ver2. (BBMS2) today. With it I'll try to connect my 30kWh(C5) lead acid to some of my LFP and operate those together with single Deye. Let see how it goes.
Also LFP prices are low so decided to get 15kWh pack on wheels.
Also LFP prices are low so decided to get 15kWh pack on wheels.
Brucey
Solar Wizard
Fully pre built from China?
shadowmaker
Solar Addict
Yes.
Brucey
Solar Wizard
Can you talk prices or still special deals?
shadowmaker
Solar Addict
Still special deals, so can't tell you where or who's, but 125e/kWh.
I bought some of these for $1800 each:
Dawnice?
Anyone have any experience with Dawnice in China? "Paul" is offering a 15kwh battery with ddp to Georgia for $2400 total. 100A max discharge 10y warranty which really means nothing if no one vouches
diysolarforum.com
And a bit cheaper 280Ah ones:
If 280Ah cells are commonly available, why are 280Ah pre-built batteries rarely found for sale?
I regularly see 100, 120, 150, 200, 300A/h etc batteries in the marketplace but given 280A/h cells are relatively common, you rarely see them as pre-built versions. Can anyone explain why?
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shadowmaker
Solar Addict
It seems their 15kW on wheels is 16S (many of those 15kWh batteries seem to be 15S for some reason), but has different BMS than my current rack batteries. Don't want that so ordered 2x10kWh rack batts more. They are actually marginally cheaper per kWh.
Tried yesterday to discharge (0,1-0,2C) my current LFP batteries from 100% down to 5% and got 77,6kWh out of nominally 76.8kWh set according Deye (don't have shunt). Don't know how accurate that is, but I think that's good enough for me.
Tried yesterday to discharge (0,1-0,2C) my current LFP batteries from 100% down to 5% and got 77,6kWh out of nominally 76.8kWh set according Deye (don't have shunt). Don't know how accurate that is, but I think that's good enough for me.
shadowmaker
Solar Addict
Made another roundtrip from 5% (~3,05V) to full (~3,5V) and back to 5% with my LFPs and got 82,6kWh in and 80,6kWh out. These batteries should be nominally only 76,8kWh. Got 3 x 5,12kWh wall mounts and 6 x 10,24kWh rack batteries so far.
Reship informed my Battery Bank Management System ver.2 (BBMS2) has left their warehouse, so something like two weeks and it should arrive. Two 10,24kWh rack batteries that I ordered should take much longer to get here though. The plan is to combine my 625Ah(C5) FLA forklift battery with these two rack batteries using BBMS2. Really don't know how it's going to work out, but I worry it later. The plan is to get more charging capacity for that FLA charging Deye as now it uses only about 1/3rd of its full potential. At this time of year it's not a big problem as spot prices are usually high and selling to grid is fine. But in summer prices usually are so low that storing (=self use) is wiser.
Reship informed my Battery Bank Management System ver.2 (BBMS2) has left their warehouse, so something like two weeks and it should arrive. Two 10,24kWh rack batteries that I ordered should take much longer to get here though. The plan is to combine my 625Ah(C5) FLA forklift battery with these two rack batteries using BBMS2. Really don't know how it's going to work out, but I worry it later. The plan is to get more charging capacity for that FLA charging Deye as now it uses only about 1/3rd of its full potential. At this time of year it's not a big problem as spot prices are usually high and selling to grid is fine. But in summer prices usually are so low that storing (=self use) is wiser.
shadowmaker
Solar Addict
Total production for first year is 44,6MWh. Crappy weather for last two months. It did outperform PVWatts yearly prediction so can't be sad.
shadowmaker
Solar Addict
Got all time best today with 340kWh. Lost something like 15-20kWh because last 2,5 hours were cloudy and there was also 2 hours of clipping in the middle of the day. Fresh snow on the ground and -10C. Day is also almost 14 hours long already.
shadowmaker
Solar Addict
Now what is the "correct" way to add more charging power to my system? With two Deye12Ks I can charge only ~26kW (2x240A) at the moment while I have ~100kWh of batt capacity plus I can use two different batt chemistries. Also my "Little blue" genny should be on it's sweet spot around 30-40kW.
Chargeverter(s)? / another Deye?
With about 3,5 Chargeverters I could get another Deye12K. That would mean 17,5kW vs 13kW additional charging capacity, but with Deye I could also get more MPPTs and raise my surge capability from 48kW to 72kW plus have three different battery banks to charge. I think that's a win for another Deye, but it is possible there can be compatibility problems with three Deyes connected parallel without comm cable between them. I already know how good my two Deyes are working together without comms so I'm willing to take my chances with it. The big question is how to charge with my old 1967 50kVA diesel generator? Is the power pure enough, and if not, can Deye purify it (like Chargeverter(s) can?)? From what I've read before only one Deye can be used with generator when they are connected with comms and thus have a common battery bank to charge. That means only ~12kW(?) battery charge from generator is possible no matter how many Deyes there are. But if I don't use comms like my current setup with two Deyes, I could gen charge each with that same power? So with three Deyes I could charge 3x12Kw=36kW using "Little blue"???
Thoughts? Anyone?
Chargeverter(s)? / another Deye?
With about 3,5 Chargeverters I could get another Deye12K. That would mean 17,5kW vs 13kW additional charging capacity, but with Deye I could also get more MPPTs and raise my surge capability from 48kW to 72kW plus have three different battery banks to charge. I think that's a win for another Deye, but it is possible there can be compatibility problems with three Deyes connected parallel without comm cable between them. I already know how good my two Deyes are working together without comms so I'm willing to take my chances with it. The big question is how to charge with my old 1967 50kVA diesel generator? Is the power pure enough, and if not, can Deye purify it (like Chargeverter(s) can?)? From what I've read before only one Deye can be used with generator when they are connected with comms and thus have a common battery bank to charge. That means only ~12kW(?) battery charge from generator is possible no matter how many Deyes there are. But if I don't use comms like my current setup with two Deyes, I could gen charge each with that same power? So with three Deyes I could charge 3x12Kw=36kW using "Little blue"???
Thoughts? Anyone?
42OhmsPA
What's in a title?
Lots of options...
Power rectifier would be the easiest.
An Emerson R48-3000e3 can be had for $75.
DIY 'Chargenectifier'
Based of the informative info recently posted by @ChrisFullPower in another thread I'm intrigued in DIY'ing a charger from used rectifiers. A quick search on eBay for '48v rectifier' has made me realize it's definitely doable at costs much lower than off the shelf options... I'll start with a...
diysolarforum.com
You could also pick a "cheap" AIO like the SRNE HYP, ASP, or HESP and use it for charging only if you wanted to have a additional solar charging power as well.
houseofancients
Solar Wizard
I'd go for a 3rd deye
Brucey
Solar Wizard
How do you have them in parallel without comms cable? So they are each powering different buildings/loads/panels?
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