houseofancients
Solar Wizard
it's a seplos bms , so hv disconnect is set by default to either 3.45 or 3.5 ( depending on firmware version)
Rosen Solar from Alibaba, anyone have experience?
- Thread starter Batonage
- Start date
Checked all cells in all batteries and all between the 3322 and 3325 mv.
All battery voltages are 49.86v this morning. Is there anything wrong with these figures ?
houseofancients
Solar Wizard
you will not see any difference until you get in the higher charge zones ( 3.39 and up).
measuring at this state of charge is pointless for lifepo4
Thanks , I have downloaded the seplos software and ready to use it , which cable is used from PC to battery?
Sanwizard
Solar Wizard
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I am not sure of the settings for the Rosen variant, especially the baud rate and dip switch settings. Try dip 1 on first.
Jeromebricolo
New Member
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- Oct 30, 2021
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j'ai lu ceci sur le site de seplos, problème connu :
"
6
Q : Les onduleurs SMA et Victron signalent une panne lorsque le BMS est complètement chargé.
R : Le problème peut être résolu en actualisant le programme du micrologiciel (version 2.8). Le BMS V16 n'a pas ce défaut.
"
Sanwizard
Solar Wizard
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I would not upgrade the BMS without guidance from Rosen. ( Assuming Houseofancients is correct and it is a Seplos BMS) Just use the management software to check and adjust your settings. For some excellent info on connecting, Andy at "offgridgarage" youtube channel covers it nicely.
houseofancients
Solar Wizard
agreed 100% , upgrade is not a good idea.
your rosen is probably setup for canbus.
I have discussed this with rosen and they have just sent a customised USB-RS-485 cable ,
I hope it will come with software so as to deal with the capacity issue.
Thank you I will look at the you tube vid.
SYLVER
New Member
ROSEN SOLAR ARE SCAMPER THEY SELL US USD 23 000.00 SOLAR BATTERIES PYLONTECH.
BUT THE DON'T CAN DELIVER THE GOODS, AND THEY DON'T RETURN THE REFUND SINCE 1 MONTH.
ROSEN SOLAR SONT DES VOLEURS ILS M'ONT VENDU USD 23 000.00 DE BATTERIES PYLONTECH. CETTE MARCHANDISE NE M'A JAMAIS ETE LIVREE ET ILS ME POMETTENT UN REMBOURSEMENT DEPUIS 1 MOIS. MAINTENANT JE DOIS PAYER UN AVOCAT EN CHINE USD 1 300.00 POUR ESPERER RECUPERER MON ARGENT
I'm sorry you had a bad experience but they are definitely NOT SCAMMERS. I and many others on this board have gotten batteries and have gotten after purchase support. Communication can be slow at times, and you do run into translation issues some times, but they are not scammers. they are a real company selling legitimate batteries. It did take several months for my batteries to arrive.
I will give you the benefit of the doubt and may not know what the word "scammer" is? They are not a scam.
I purchased a 10k system from Rosen. I installed the system with 3 48vt 200ah batteries. About 1 month after installation 1 of the bms boards quit working. I contacted them. After much discussion a 2nd bms board quit. They had me testing the batteries and sending videos. I waited and the 3rd battery bms failed.
I waited months for them to recieve new stock. There was a problem with the boards having diodes fail. Finally they shipped me 3 new boards. And I began installation. When I got the 3rd board I found that they had sent me the wrong board! I contacted them, they want me to pay for the shipping.
I waited months for them to recieve new stock. There was a problem with the boards having diodes fail. Finally they shipped me 3 new boards. And I began installation. When I got the 3rd board I found that they had sent me the wrong board! I contacted them, they want me to pay for the shipping.
you just need to get forceful with them. I bought 6x 200ah batteries and they sent me 6 new boards (was a common problem with BMS boards). Then one of the power switches failed.... they walked me through it with their technician and once diagnosed, they just asked if I can just buy the switch locally ($3 or so).
So while their customer service isnt stellar, and you have to deal with time change etc, that is very different than saying they are scammers. I dont expect any other China distributor would be much better. If these type issues concern you, then pay the extra money and buy one locally.
Dan Gerrard
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- Dec 29, 2021
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My advice would be to avoid Rosen Solar. Their prices are good but misleading. They are completely sales orientated and have no customer services. In my case, they sent me the wrong batteries and refused to take them back (even with alibaba trade assurance), sold me two inverters that are not meant to be sold outside of China and now refuse to respond to any of my messages. Sitting with a system that is not working and nothing I can do. Buy from a local supplier. its worth the extra cost.
Dan Gerrard
New Member
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Hi Paul. I have had experience with Rosen Solar and it has not been good. Great on sales but zero customer services, I have also seen many similar experiences online. I did not receive the products I ordered and there is nothing I can do. They have stopped responding to my messages. Hope this helps
