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New off grid 48v build
#1
Hello everyone,
I’m new to all this but I like a challenge,
I’ve been watching hbpowerwall on YouTube for the past 3-4 months and thought I’d go the way he has,
I’m getting through the testing of 18650’s but it’s a very long process, I’ve built 12 pack up to now, Here what else I’ve gathered together so far:-

3x285w solar panels
PIP-5048HS mpp solar
2000+ 18650’s

I should be able to make over x24 80 battery packs (like hbpowerwalls ?) do I need 12 pack for 48v as I’ve seen people use 14 packs?

My plan was to build x12 80 battery packs to start with (for the 48v) that’s why I only got the x3 solar panels, I’m now building 24 packs so will get another 11 solar panels in a few months,
still got a lot of batteries to test,

Any advice would be great,
Thanks,
Phil.
paz45 likes this post
CURRENTLY:-
X3 285w + X3 250w on PCM60X + X12 250w Panels on PIP5048hs,  watchmon4, 2p14s80p 18650 packs
SOON:-
More panels  Big Grin
Reply
#2
To fit the 48V system you need 14 packs in series. 12s would be ~36.0V to 50.4V, that's too low for 48V.
Reply
#3
Thanks for that, I did wonder, I should have enough batteries for 28 packs or very close anyway,
I’ll keep everyone posted,
Thanks,
Phil.
CURRENTLY:-
X3 285w + X3 250w on PCM60X + X12 250w Panels on PIP5048hs,  watchmon4, 2p14s80p 18650 packs
SOON:-
More panels  Big Grin
Reply
#4
Yeah going that PIP you should go 14s as said.

You can always do the 2nd string smaller in terms of cells per packs or you just wait Smile
Thought about BMS?
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
Reply
#5
Hmm not sure about a bms, I’ve not thought that far ahead yet, what do you suggest?
CURRENTLY:-
X3 285w + X3 250w on PCM60X + X12 250w Panels on PIP5048hs,  watchmon4, 2p14s80p 18650 packs
SOON:-
More panels  Big Grin
Reply
#6
You ask the Batrium guy now Smile So I would say Batrium and if you search the forum my name + Batrium will show up everywhere hehe
bfleury likes this post
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
Reply
#7
ha ha, I should have known really, I’ve watched enough of yours and hbpowerwalls videos to know you would say the batrium system, What other cheaper ones is there available?
CURRENTLY:-
X3 285w + X3 250w on PCM60X + X12 250w Panels on PIP5048hs,  watchmon4, 2p14s80p 18650 packs
SOON:-
More panels  Big Grin
Reply
#8
No cheaper one that do the same things no. So what function do you want/need? How reliable do you want it to be? I did take a look at a cheap Chinese version for around 50-60 USD piece. Only 50mA balancing and buggy and you need 1 per string but it works.

I dont get anything for promoting that product though since I cant affiliate link it Tongue
The Ultimate DIY Solar and build place
YouTube / Forum system setup / My webpage  Diy Tech & Repairs

Current: 10kW Mpp Hybrid | 4kW PIP4048 | 2x PCM60x | 83kWh LiFePo4 | 10kWh 14s 18650 |  66*260W Poly
Upcoming: 14S 18650~30kWh | Automatic trip breakers, and alot more
Reply
#9
Big Grin Big Grin Big Grin
I’ll have a look as I’ll be needing it soon enough, in the mean time I’ll be testing, testing, testing them batteries  Dodgy
CURRENTLY:-
X3 285w + X3 250w on PCM60X + X12 250w Panels on PIP5048hs,  watchmon4, 2p14s80p 18650 packs
SOON:-
More panels  Big Grin
Reply
#10
Hi,
As I only have the 3 solar panels at the minute, I may as well mount them, will it be ok to use them in series,
Like this but with 3 panels
 

This is the spec of the panels
 

and also with the PIP-5048HS inverter be ok with them in series?
Thanks
Phil.
CURRENTLY:-
X3 285w + X3 250w on PCM60X + X12 250w Panels on PIP5048hs,  watchmon4, 2p14s80p 18650 packs
SOON:-
More panels  Big Grin
Reply


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