Marcel Cerdan

Item: Complete off grid, inverter + solar panels + batteries system Age: parts are from 2018 to 2023 Price: make an offer Payment Method Accepted: EFT Warranty: none Condition: used but good Location: Noordhoek, Cape Town Reason: Upgrading to a new system Collection: at my place. Details : The system can produce 27 to 31 kW per day depending on how well you install the solar panels. That's R108 to R123 saved per day, R39,410 to R44,895 per year, using a R4 per kW very conservative figure. - 12x 12.8V LiNERGY 12.8v 200ah LifePo4 Battery 2.6Kwh each (31.2 kWh total). Bought in 2023. 100 cycles. Were R150,000 new. - 24x Canadian Solar panels 270w (6.48kWp in total) bought in 2018 and 2019 still delivering a 100% of their rated power. - 1x Mecer 5 kVa inverter bought in 2019. - Pi computer with monitoring system. - cables, junction boxes, isolators, etc

I had a lot of exchange with the guys building and selling them. Nice bunch. I gave them a go and swapped my AGM for those. So far, so good!

Hey guys. Has anyone heard about those : LiNERGY 12.8v 200ah Drop In Replacement LifePo4 Lithium Battery 2.6Kwh https://www.livestainable.co.za/product/linergy-12-8v-drop-in-replacement-lifepo4-lithium-battery-200ah-2-6kwh/?utm_campaign=campaign%3A+LiNERGY+Campaign+2+(637b61f1c60ca2001ccb517d)&utm_medium=email&utm_source=omnisend&omnisendContactID=62fa62e347c03d001cde085f I struggle to find any review or feedback. I consider them to replace my 16 x AGM Lead-Acid 200ah 12V. Best regards. Linergy_Datasheet.pdf

Thanks for the details.

Thank you. And it doesn't void your warranty, right?

Dear all. I have a couple of Meccer SOL-I-AX-5M inverters in parallels. They used to be connectes to lead/acid batteries. I'm considering upgrading to lithium batteries. The installers I'm in discussion with is saying that the Meccer SOL-I-AX-5M can't deal with the lithium battery controller and that it means using those inverters and lithium batteries will void the batteries warranty. Does that make sense to you? Are they simply trying to sell me a new inverter? Best regards.

Hello, I'll need 2x HA-02 Balancers to balance 2 banks of 4S2P batterie. Best regards.

Hi guys. I struggle to understand my own installation. It's been done in 3 phases. First phase : 1 x Axpert 5 kVa 12 x 270 W PV 4 in series x 2 in parallel = 1 bank of 12 V 200 Ah batteries : 1 x BVM-712 Second phase, upgrade to : 2 x Axpert 5 kVa Third phase upgrade to : 24 x 270 W PV 4 in series x 2 in parallel x 2 banks of 12 V 200 Ah batteries 2 x BVM-712 At the moment, this is the way everything seemed to be plugged together (and I'm no expert at all, hence the struggle) : - 4 in series x 2 in parallel = 1 bank of 12 V 200 Ah batteries is plugged to one of the Axpert - 4 in series x 2 in parallel = 1 bank of 12 V 200 Ah batteries is plugged to the other Axpert - the 2 banks are linked to 1 shunt and 1 BVM-712 only, itself linked to one of the Axpert inverter Does that seems right to you? The 2 batteries banks use a same type of battery but not the same brand. There not in the physical same space for a lack of space where the first bank was.

I have 2 x 4 batteries inside the roof and then 2 x 4 batteries outside on the flat roof. Here is a picture of one of the bank.

Sure! What would be the cost? How many units do I need?

Thanks, I'm looking for balancer ASAP, before it's too late!

I've been on the forum store and can't find those HA-02 balancer. Where do you guys get them from?

Thanks DeepBass9. If I hear it, at least, I won't go in panic mode now 😂

Hey Chris. Thanks a lot. That's a lot of help. Makes you wonder how come installers don't propose it from the beginning! I my case of 4x4 batteries, I need one balancer per group of 4 batteries? Cheers.

Hey guys, I have a 16x 12 v 200 Ah AGM batteries linked to 2x Axpert 5KVa inverters, monitored through a Victron BVM-712 and ICC-Pi. I don't have any battery balancer at the moment. Should I get some? The battery midpoint deviation value seems to increase significantly recently. (see screenshots) Thanks for your help!

Just installed 73.00e on both of them and reconfigured them. I'll see how the KettleComp feature behave and I'll let you know Thanks for the tips and all the help. This forum is gold mine!

@Coulomb Hey! As you know from saving my ass of the error 90 a week ago or so, I'm on 74.40 for a while now. I'd say 2 months and a half now. Only because I was asked to install it by the local Mecer importer. I use the ICC on Pi but I don't see load and temperature logs. Only graphs for the last 24 hours. If you know where to find them, I'm happy to extract them for you. I can screenshot the graphs for a few days too at like noon every day. I'm not sure we pushed the inverter above 4kW. We usually peak around 7/8kW on 2 parallels inverters. Regarding firmware 73.00e, is it this one I found in the post on the AEVA Forum? http://forums.aeva.asn.au/viewtopic.php?p=70827#p70827 Cheers!

Hey Coulomb. Thanks for your reply. I'm already running on 74.40 firmware. Does it means that we turned our 4kW machines into 5kW ones? Would 73.00e be a safer way to go?

How are you going to access your Pi from a remote location? VPN?

Hey guys, I'd like to avoid my system to go back to grid when batteries voltage dips for just a few seconds under the Back To Grid voltage setting. Here is my system: 2x Mecer Inverters 5kVA/4kW SOL-I-AX-5M in parallels. 24x PV Canadian Solar 270W C26K-270P-FG 16x 12v AGM battery OmniPower OPR 240-12 1x Victron BMV 712 1x ICC Pi I attached the inverter configuration. It's running smoothly most of the time and we barely need to draw from the grid. Only when we have several cloudy days in a row. However, I'm struggling with one issue. While the SOC remains above 90%, the voltage is sometimes dropping under 48V for a few seconds, triggering the Back To Grid setup. A few seconds later, the voltage is back above 50V, hence the Back To Discharge setup at 50V and not 54V. Is there a way to prevent the system from going back to the grid when the deep below the triggering voltage is so short? Cheers!

You saved the day! Exiting PowerWatch properly was the only way to have Reflash working. That's something I'll never forget again. I thought I had exited PowerWatch but I had just closed the window. After that, Reflash was happy to do it's job. I really owe you one! Best regards.

Thanks a lot for your reply. Your dedication and commitment to this forum are outstanding. You're correct, the errors are from WatchPower. One of the machines came with the following software 72.40. I'm not sure for the other one. Reflash is struggling to established connection. I wonder if the FAIL-LINE I see in WatchPower isn't happening in Reflash too.

Hi guys. I'm hitting a wall with my 2 Mecer Inverters. For a year and half, my 2 inverters, in parallels, worked flawlessly. 3 months ago, one of the boards blew. Mustek took 3 attempts to finally fix the board (sic) but didn't flash the correct firmware on the faulty inverter. They ask my provider to flash firmware 74.40 on both inverter. They provided the software. My provider didn't manage to do it, I had to learn how to do it and did it. All is well that ends well... except not so much. Exactly 60 days later, I get the error code 90. So I look a bit up this forum, find the reason, get more pissed at Mustek but they won't open until Monday anyway and it's now loadshedding stage 3. My plan was to reflash the inverters. Not so fast: now, I can communicate to the inverter, using the RS232 cable and a USB adapter, but the communication gets in LINE_FAIL after a couple of seconds. It the same setup than 2 months ago when I flashed them. Same computer, same OS, same Windows 10, same cables, etc. I didn't come here just to vent frustration, you guys don't deserve that. But is there any chance one of you knows its way around this issue? Or does it mean that I need to get those inverters off the wall and bring them back to Mustek on Monday which is going to be an interesting moment, for sure?