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Dear Members, I am kinda frustrated with my two Chinese solar charge controllers which I have connected to charge same single battery bank of 400Ah Array 1 is 5kwp and Array 2 is 5.6kwp both are on the same roof similar direction and tilt. The problem is...When Array 1 charges at 40A Array 2...

I have two strings of solar array 5kwP each. Each string is hooked to two different solar charge controllers which are charging one same battery bank. Both chargers are doing fine. I have made sure these chargers have same charging settings (both float and bulk at 57.2v) My expectation is...

Hi everyone, My panels serve as a car shade. As I have just seen these wierd pink marks from below the panels. I would like to know if it is something to do with damage or water leakage. These panels are covered with a tempered glass at the top. It is mid day and it is really hot. Thanks...

I have used several solar charge controllers in a same single PV circuit. They have been generating various levels of power. As the generation levels have been varying, I am inclined to believe there are several factors which lead to some cases I can't reap maximum benefit out of my PV investment

Hi, I always keep thinking of solar charge control which has a maximum PV voltage of 150V I have my panels in 2S5P. My 2S is giving me maximum of 115V.....I have 35V unused which I could have made my panels start generating at may be 5:30am or 6am Am I dreaming ? Any ideas are welcomed as I...

Hi All, Disappointed and frustrated..... My charge controller broke down two weeks ago.... while I am in a process of getting another charge controller. I left my battery bank still connected but without load. I went on safari and just came back only to find my CALB cells have swollen...

Hi I am just thinking.... Putting a huge panel 8kwh all of them setup in xP and yS series but I want to make sure all of the circuit is looped into two or three smart solar charge controllers which will be parallel to each other connected to a single huge battery bank. The idea is to ensure...

Hi All, I am just wondering.....may the battery gurus can help me to understand. If a grade A lithium cell drops its capacity to 80% after complete 2000 fully recharge and discharge cycles. Say 100ah drops to 80ah. Is it right for me to assume this same cell dropping to 80% of 80ah will...

Hi, I am just wondering, when battery degrades to its 80% of its original capacity.....lets say 10Kwh degrades to 8Kwh. What will be the voltage of this battery if I charge it with 8Kwh of power ? Will the individual cells read 3.6v or 3.3v ? I have never seen my battery bank go beyond 53v...

Hi, I am running a 3kw inverter which shuts off at exactly 40V while my Solar Charge Control has maximum voltage of 58.4V which means it is 3.65V per cell. I am just thinking what is the additional benefit I may get for investing into a BMS instead of the active 16S balancer which takes care...

I am looking for low cost LFP. The Seller must be ready to avail the cells to be tested in my warehouse in Guangzhou. Should they fail.....you pick your stuff and go back with

Hi I have a second hand 48V 400Ah battery bank I bought from China just a month ago. The battery is 24/7 on load hooked to solar panels and an inverter which is drawing around 500watts as the sun goes down around 5pm in a tropical hot Dar es Salaam. By the time sun goes down, according to the...

Hi All, I have been running a used LiPO4 battery for almost a year now at my grandpa house as a back up plan. This Christmas I did spend time to study its behavior and test its health. It is a 200AH 48V CALB being charged with 50A charge controller. It is only supporting lighting and a...

Hi, It is 4 yrs now i have been using this cheap chinese inverter to power my parents house automatically working as an UPS for lighting and Television. During the first 3 yrs I was using Lead Acid Batteries. It is 4 months now I have been using LiPo4 cells 12V 180AH CALB. The question is, the...

Hi All, I am in Dar es Salaam, currently full of sun power as it is just below equator (6degrees South) I have a 5KW solar panels connected to a 100A SCC which is loaded with 400AH 48V LiPo4. The Battery bank is directly hooked to a 3000W inverter The cable from solar panels to the battery...

Hi All, I find my self frustrated....I have my 5kw pannels with 100A charge controller. My charging voltage goes as far as 57.6v as a maximum l found it in lithium setup in the charge controller. However, the maximum I have ever seen as charging voltage is around 56.0v and it settles at 53v...

Hi All, I find my self frustrated....I have my 5kw pannels with 100A charge controller. My charging voltage goes as far as 57.6v as a maximum l found it in lithium setup in the charge controller. However, the maximum I have ever seen as charging voltage is around 56.0v and it settles at 53v...

Hi, It comes with passion that I have parked my national grid for almost 6 months now. My dream is to see my grade B lithium battery survive for next 20 yrs Somewhere I did read that as batteries get old the internal resistance rise up I would like to know/sense of when it is rising.....I...

Hi, Six months ago I setup a small 200AH 12V Lithium battery for emergence lights at my parents' house. The battery is charged by grid In most cases the battery remains idle as they have few power cuts. I just realized I completely ignored need of an active balancer for the cells I just...

Hi, I am in Dar es Salaam. With such stable weather in past few months. I am wondering why should my battery voltage shake in such a way as in the attached screenshot. It is almost midnight...we are asleep with only security lights remaining ON. I have several LED security lights which remain...

I am kinda asking..... Why does my battery voltage drops significantly whever I switch on heavier loads ? Please see my attached screenshot. The voltage recovered back to 52.8v as soon as I switched off my 2000w water kettle. Question: Is it my cable resistance between battery and inverter...

Hi, I am running a 400Ah lithium bank in an outdoor cage in a typical tropical climate (Dar es Salaam). Being charged at a maximum of 62A during peak hours. Around same peak hours my ambient temperature is at 40°C as a maximum temperature and drops to 29°C at midnight. I am trying to imagine...

Hi, I have a friend looking for a retirement off-grid house with once for all investment, I am just thinking what is the longest CALB cells calendar age is so far in record. He is thinking of 25years of running. Can the 25yrs of life for CALB cells be realistic? Given that the DoD will be...

I have bought Prismatic cells 16 of them. Because of space issues...I am thinking to lay down the prismatic cells instead of standing them up as most of pictures show. Is there any harm ? Thanks, Innocent

I have received two CALB swollen cells from China. Their voltages were at 3.22v while all others were at 3.26v I am just thinking, if I put them in a freezer overnight before charging them.Will it help ? Thanks, Innocent

I have been roaming around in the internet researching about my life expectancy of my LiFePo4 battery bank. I have come across this calculator here which is estimating my battery life to be 24years. I am astonished by the numbers.... Can somebody validate it ...

Hi For almost six months now I have 10 panels of 500W with below specifications Model NS-500S6-32 Maximum Power at STC(Pmax) 500W Optimum Operating Voltage (Vmp) 48.63V Optimum Operating Current (Imp) 10.29A Open-Circuit Voltage (Voc) 59.0V NSort-Circuit Current (Isc) 10.87A Solar Cell...

I have been thinking of upgrading my storage bank from 10KWH to 30KWH. Going through Alibaba website I am confused with price differences between EVE, LISHEN and CALB prices Can someone explain this Thanks Innocent

I have a grade B 48V, 200AH lithium battery bank. I am just thinking to extent capacity by buying Grade A 48V, 280AH lithium bank and hook them in parallel to my charge controller and inverter. Will this impact life expectancy my Grade A cells Thanks, Innocent

I have been using grade B lithium cells for 2years now. Currently I have 48V, 200AH storage which is serving its purpose with worries whether I can get next morning whenever I switch my airconditing ON. My wish is to get the 30KWH storage bank for me to forget about energy storage. The problem...

Hi Guys, I have a Grade B power bank of 48V 200AH for my solar system. Yesterday evening, I checked the battery level was 88%. I went to sleep with my security lights ON and used my 9000BTU Airconditioner for 3 hours. Yet this morning at 7am, the battery is 88% with only 0.2KWh charged...

Hi, I am located in Dar es Salaam. I have setup a 5kw panels with a small power storage of second hand 48V 200Ah lithium battery bank. I was wondering if I can improve my facility to enable me produce 30 kwh per day if I can invest in storage. I am currently producing around 14-15 Kwh per day.

Hi, I wish to build up a 30Kwh lithium battery bank to put fully relly on solar for 100% I would like to get some references for best and cheaper suppliers of Lithium cells through Alibaba. I find the Chinese suppliers to be very rigid. Any idea?

Hi I would like to do two scc in parallel from single PV array controlling same battery bank. I believe the scc won't be getting hot as much and redundancy will help incase of one scc goes bad. See my diagram attached Any ideas ? Thanks, Innocent Attachments

Hi, Recently I installed a 5kw sola panel capacity with a Chinese SNADI MPPT charge controller (100A). My battery bank is lithium 48V. The system worked fine for few days then over suddenly it stopped charging. I tried to disconnect and reconnect again, only to realize the solar charging...