Author Topic: Juntek state of charge Meter mods  (Read 71 times)

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Offline noneyabussiness

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Juntek state of charge Meter mods
« on: June 17, 2020, 04:11:36 am »
i have used these devices for years and found some interesting things.... https://www.aliexpress.com/item/32866409420.html...

PRO:
very handy for state of charge, bi-directional current sensing..
seem pretty accurate...

CON:
the wireless signal is quite dismal, 10-15 meters advertised.. .bout that in real life..

so lets fix that, it uses the standard NRF24L01 modules... sweet order some palna+ versions , like this https://www.ebay.com.au/i/133381532534?chn=ps&norover=1&mkevt=1&mkrid=705-139619-5960-0&mkcid=2&itemid=133381532534&targetid=892931907096&device=c&mktype=pla&googleloc=9069084&poi=&campaignid=10101784961&mkgroupid=102311923620&rlsatarget=pla-892931907096&abcId=1145981&merchantid=7364522&gclid=EAIaIQobChMIvuvfp7yI6gIVwRErCh3ucQITEAQYAyABEgJZ0_D_BwE

matter of squizzing them in... sorry only took finished pics, but you get the idea..

first pic, installed in the "sender " unit, i have 2, one does wired in shed, other is inside house.

8609-08611-18613-28615-3

Happily transmits inside about 30-40 metres away, with 2 walls.. happy camper

Offline solarnewbee

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Re: Juntek state of charge Meter mods
« Reply #1 on: June 19, 2020, 06:41:53 pm »
Hi Noneya!

Long time, looks great. I’ve been doing the Midnite Solar thing they finally have a cloud app it’s decent. Anyways, I see 2 shunts in series, is that to raise current handling capabilities or am I seeing it wrong.

😎
SN

Any day above ground is a day for potential mishaps

Offline noneyabussiness

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Re: Juntek state of charge Meter mods
« Reply #2 on: June 20, 2020, 03:51:05 am »
There is 2 gauges in 2 different locations... for convenience..

They are 500 amp 75mv shunts, so bugger all dissipation.