Search results

Hi I have a strange problem: I have 2 DIY packs, both 280ah 24V. One uses JBD BMS (xiaoxiang app) and the other one JK BMS B2A8S20P. The JBD pack is older it was working like 6 months here and I added the JK pack 2 days ago. Both go onto same 24V busbar. So far all looked good, however this...

Hello trying to buy some LFP packs and the manufacturer tries to convince me that 24V packs with BMS inside can be put in series to make 48V Battery - when there is no BMS connection between the packs (so only positive of pack 1 to negative of pack 2, no other connection between the packs and...

Did any of you do business with any of those? Comments? Yunnan Sunstone Power Technology Industry Fujian Super Solar Energy Technology Co., Ltd Huizhou Youmei Electronic Technology Co., Shenzhen AKA New Energy Technology Co. Shenzhen Jidian Technology Co., Ltd. Neata Battery Manufacture...

https://www.aliexpress.com/item/3256804212551987.html ?

Hi several "blade type" Lifepo4 cells labeled as BYD appear on Alibaba: https://www.alibaba.com/product-detail/Byd-Lifepo4-Lifepo4byd-138Ah-Deep-Cycle_1600401619187.html https://www.alibaba.com/product-detail/LiFePO4-Cells-BYD-3-2v-270ah_1600446807710.html...

I've a M215 here from Ebay and I would like to try it up but I do not want to spend on that expensive Envoy thing. Is there a way to install this microinverter without Envoy, maybe using standard powerline adapters (like Dlink etc)?

Hi I've a solar panel where the aluminum frame partially detached from the laminate (at one side). The white glue came off from the EVA but it still sticks to the metal frame (but so the frame doesn't stick anymore to the EVA). What would be the correct way of fixing this? Liquid nails? some...

Hi Ive a 250W that has developed some visible snail trails. It gives only 28Voc instead of 38Voc :/ It doesn't look that bad actually from outside so I wonder why the power output is so bad?! Do snail trails always reduce power output that much? link to pictures...

https://www.aliexpress.com/item/1005002941742477.html what do you think about these? Can the size ever accommodate the 180Ah? Look bit small to me?!

hi maybe this is a stupid question... but... if charger and load are on the same BMS port and the BMS disconnects the charger due to over voltage, does this automatically mean that the load is also disconnected? I hardly see how it would not be the case? If load and charger are disconnected at...

Hi Ive 2 nearly identical MPPT 100/30, both are connected to the same bus bar (same studs!), same cable length, same cable cross section and they show the voltage of the battery differently by about 0.4V! E.g. (1) shows 27.2 the other 26.8V, at the same time. I believe they are different HW...

Hi the victron app has updated my 24/500 inverter and now it cant handle my fridge load! I believe it updated it from 1.11 to 1.17 fw. Then Ive noticed the fridge will now kick the Victron into overload at start and this will repeat few times until victron gives up and will not come back! That...

Hi my new chargery 16T seems decalibrated. Cell voltage measured with multimeter at bat terminals AND at the chargery cable port are all 3.290-3.291 but the BMS shows 3.26 - 3.33... WTF seems these BMS come completely decalibrated from factory?

Hi what I realize building LFP packs is the lack of real comm between BMS and solar chargers. Usually BMS will have some sort of charge control but this either means internal mosfet or some relay output etc. Why after so many years companies like eg Victron do not make their chargers with a BMS...

Hello AE and Alibaba is full of ready-to-go battery packs, power wall clones and so on. I wonder if buying these poses similar risk as buying single LFP cells? Any experience on these packs? Lot of people got scammed buying LFPs, getting bloated or damaged batteries (or not getting anything at...

Hi are there any MC4 connectors with gold plated contacts? (for crimping)

Hello everyone, we made a video about what happened to a solar project here in the Bahamas: My neighbour was basically scammed for $4000 (+VAT+duties) on solar batteries. Beware about the Shenzhen Foxell Technologies Co., Ltd! They will ship you completely damaged cells and refuse to take...