pieter.fourie

Battery charging on cloudy day

The inverter is working correctly except for in the mornings when it starts charging cycles on/off continuesly because the batteries got depleted and inverter switched off due to low voltage at about an hour before sunrise. I then have to switch off the solarpanel charge wire supply at sunrise which is the only way off stopping the on/off cycling. Then wait another 30min and switch the solarpanel charge wire back on. Then the inverter will start perfectly normal. The supplier suggested setting it to SUB priority and add some batteries. All other things considered i am happy with the inverter.

Yesterday -17-5-2024 i changed the panels to 2 x strings of 3 x 325w in parallel for a test reasoning more amps at 60v when recovering from low voltage shutdown. The inverter did not like this at all and gave more errors. So i changed it back to 6 x 325w in series Then the wifi (SmartESS WiFi Plug Pro) showed offline so i could not see the graphing. It took me half the day to get it online again. What happened was the ip address changed of the wifi plug pro most probably by my router. I had to delete everything on the SMARTESS app and create a new login and add the device in the new login. (youtube.com/watch?v=HqVQ07IHhLk) I could not recover the graphing on the old login. No data was lost as the logger was working while it was showing offline in the app. The support from Solarwarehousesa was quick to give general comments and critique but no solution was given at all to this problem of low voltage restart on/off cycling in the mornings. I deduct therefore i am one of the very first who bought this model and having this problem. My answer to support was the inverter needs to gracefully restart after a low voltage shutdown in offgrid mode which can only be done in software/firmware update. Hopefully they take this up with the manufacturer. One solution could be to insert a timer on a low voltage recovery restart or make the min charge voltage of 60v adjustable upward.

Hi Scorp007 As said previously i am an Mech/Elec engineer However the advise you gave is 100% correct. Switching off the inverter does not switch the fans off. (i had a similar situation with a 3kw MECER hybrid (non-sinewave) inverter-eventually gave it to my brother for free) I have 6 x 325w panels in series I attached a screenshot when tested inverter output with a 1.5kw load The app kw readings are incorrect too low 1.1 on the app is actually 1.4kw on the inverter I was in the same situation with my WRND charger whereas i had to use another charger in parallel to bring the voltage up for the WRND to switch on. I bought this Conderenergy thinking it is working 100% in all scenarios to actually eliminate me watching the charging every morning. Now i am back to square 1 after spending about R6000. I have contacted the supplier with regard to this error Being engineering minded all equipment should have been tested fool proof under all conditions to a satisfactory level. Be assured others will run into this same situation - hence this post to help others. I am busy systematically changing my batteries over from SLA to Lithium as the SLA gets old. (i check the batteries with a thermal camera)

Conderenergy s-2435 --hiccups My batteries gets depleted every night as the inverter fans are running continually non stop -- 30w no-load power usage according to specs My previous inverter 4kw did not deplete the batteries. However in the morning when the panels start to get some power the inverter cycles on and off continuously until i pull the breaker on the solar panel wire connection I have adjusted some settings yesterday morning but the same happened this morning. The priority setting was SBU ---default is SUB- but this is an offgrid install So this morning i changed to UBS priority -- will see what happens tomorrow morning. The inverter basically switches on but there is not enough solar charging yet and it switches off again. I cannot think of any means currently to cause a delay in the inverter switching on The solar charge voltage is min-60v nominal-240v and max-500v So if i was able to adjust the 60v higher it would switch on when there is enough power from the panels mainly to drive the 30w fans Battery voltage is 22v in the morning- it only switches off at 20v. No matter what i tried the only way to stop the inverter cycling was by disconnect solar panel wire. As with all my previous inverter experience they always lock you out somewhere. Never full control

How can business people sell a battery charger that stops charging when battery low voltage and never recover. I bought the WRND 2nd hand and very quickly found out why it was being replaced. There was no answer from the support on this charger.

user Manual Too big too post here https://www.geewiz.co.za/index.php?controller=attachment&id_attachment=2401

I started the unit this morning but first checking panels voltage then inserted fuse. I was far from the inverter and it was cycling on and off i could hear. I switched the main switch off and on and then all looked normal. I am using it offgrid . Did a DIY install but i have an engineering qaulification. I was so excited to see it started a woodwork spindle with industrial motor without hesitation. I could never start it with my WRND charger because the damn charger would switch off when batteryvolts went low. Thereafter installed the wifi addon. Will post pics later of the wifi app screens I saw in the specs the no load power used is 30w. So the fans never switch totally off. The fans are very quiet.

Ordered from Solarwarehousesa on 6 April 2023 I tested it with a loose 6.6ah lithium battery to check that it switches on before i installed it. It switched of after 2 seconds. Thought maybe battery is to small. Then switch off and on again then it stayed on. It scares a person. I installed it replacing my main seperate 4kw inverter and 120A WRND solar charger. The WRND charger would switch off (Shows off) when low battery and never switched on by itself again. I had to use a seperate charger in parallel with WRND to up batteryvoltage and after some time the WRND would recover. WRND support never responded. The conderenergy has 2 bottom fans and i have yet to see them stopped when nighttime. That means it is draining my batteries unneccassary during the night. The fans are fairly quiet when nighttime. I will post more experience when coming across new flaws i find.

More bad reports https://www.hellopeter.com/wrnd https://za.africabz.com/western-cape/wrnd-manufacturing-cc-161028