Skyelmad

Your correct @GreenFields, we have to choose full off grid or pay eskom. Corruption may be rampant on government but that doesn't mean ESKOM must provide power to our houses for free. It costs to bring power to our doors, the least we can do is pay a connection fee if we have a grid feed. We can debate about the price. I think R200 to R300 Max then +R1,50/kwh but less than R2,50/kwh for usage. If you select off grid then R0,00 payment but meter and cable must be removed from property. If the freeloaders were minimal then R100 Max connection fee would suffice to cover their transmission costs.

Probably a damaged cable somewhere. Causes a short circuit or live to ground. hard to find especially if it doesn't trip the breaker or happens randomly. I had this fault and it was a damaged wire to the outside lights. It happens sometimes if it rains or windy the wires touch ever so slightly and trips or nothing happens. Nightmare to find it.

Try A2Z automation they might have what you need

You can but first check charge voltage and float voltage are the same or very close as not to overcharge or under charge any. You'll have to choose "USE" on battery type and set voltages according to battery specs. Preferably just 0.3v lower Currently I've paralleled AGM with Lithium. No issues at all. You won't have communication with the inverter

6 PV1 6 PV2 That will work fine.

I have 2 Must PV1800 Pro 5.2kW in parallel off grid with 12x12V 200ah = 600AH AGM battery bank and 12x 550W Canadian solar panels. It functions satisfactory to a degree since December 2023. 1st issue is when battery is full only the master inverter throttles PV production whilst the other gives full PV power available and thus battery overvoltage then loss of synchronisation alarm (84) comes and reboots itself within 60 seconds and continues working fine there after. 2nd issue is the dataloggers is giving me exact same values of production but the inverter screen is different by a big mmargin like 60W and 2.4kW on the other. This hhappens during the 1st issue when the battery is full and no meaningful load (not sure if this is the amateur float bug or not) Questions 1. Can I use Lead settings to reduce chance of overvoltage? AGM charges at 57,6V and LEAD at 56,8V well below the 58V overvoltage. 2. Is there implications for charging at 56.8V instead of 57.6V? 3. If i parallel every 12V battery will this lead to balanced battery? 4. Should I enable equalization on these AGM batteries? Narada 12V 200ah 3. What can I use to monitor the 2 inverters and see correct PV production and Load ?

You mean like this?

180A will be fine, that's 30A per battery, that's 0.3C

Post your inverter specs, as stated before, it looks lite it maxes out at 450V and operation is 120V to 430V. This is close to 420V made by your panels at battery full. A slight temp drop then it might exceed the 430V and switch off. The MPPT does not control Voltage only current. That's why they always speak of magic smoke if you exceed Voltage, unless your inverter has protection.

Remove 1 panel from ground string.

There is no such qualification for installation of inveters, solar or batteries. There is a qualification for testing and certification of electrical installations known as Wiremans licence. This wiremans is required by many companies for warranty purposes as it proves the system is operating correctly with required electrical protections. It also is required by insurance incase of You can install and hire a qualified person(Wiremans licence) to certify and write the COC. This is what most companies do. They have a in-house Wiremans person who certify what their labourer did and fix any mistakes. You can add your own certificates from inverter/solar/battery companies to better understand their system and prove to customers your legit otherwise learn as much as you can online and manuals.

Hhmmmm now I'm a bit worried on the DC breaker not failing. Wouldn't that fry the inverter when the voltage is exceeded if the breaker doesn't fail/trip? Does that mean we actually don't have overvoltage protection on our inverters only current?

CBI Electric QYD18U250B0 Circuit breaker Suitable for PV fuse 50A 80 V DC I don't know where they sell it. That would work. Edit: what I did is use Fuse and Circuit Breaker. Example you would use a Fuse of 50A then a Breaker of 63A 80V DC. I believe the Fuse will blow if you exceed 50A or Breaker with fail if you exceed 80V. @Coulomb what happens to the breaker if my panels exceed the voltage. Say I have 20A 500V DC breaker but panels add up to 550V?

What is Max Volts and Amps on your inverter solar input? You need to use that value not your panels. Your actually trying to not blow the inverter with too high voltage not the amps. Say your inverter says 60A 80V then you need a breaker that's say DC 63A 80V. If you exceed 63A it will trip or if you exceed 80V also it trips. That's how I understand it, anyway I'm not electrician, I just work with electricity.

You need to provide enough information for people to help out. Inverter brand?, battery?, any solar panels? Then settings.