FixAMess

Why do most inverters fail? This answer will drive the parallel vs increased capacity argument. Forget about the theoretical mumbo jumbo, if lightning hits your house, your inverter is toast. If you have a massive surge from your utility provider, your inverter is toast. Bottom line, which is cheaper, a new 10kW inverter , selling the old 5kW or just buying a new 5kW. All things being equal, the reliability of the inverter/s when taking the the most common causes of failure into account is the same for both solutions. More nb is to make sure your inverters are insured and you have a CoC and propper surge protection AS REQUIRED BY YOUR INSURER!

Ask your insurance company what they require and then fit it. Outsurance informed me that a 40KA SPD must be attached on main incoming line otherwise they will not cover elec surges. I also fitted on my other DBs..R7k later!

Age? What inverter were the pylontechs connected to? Consider selling seperatly..

What inverter was charging the batteries? Run these commands to give an assessment of health, over charhe etc. info soh stat The info uou provided just gives current cell voltage, not history of charge issues.

Not very smart of you..🤣 Sorry, I just had to!

I bought 2 X US3000 batteries, manufactured in 2019. The sticker clearly states they're a 3.55kWh battery, but when I look on Batteryview, it states they're only 50Ah batteries, so 2.4kWh, not the normal US3000 74Ah, 3.5kWh batteries. Does anybody else know if pylontech released a 50aH us3000 battery?

Soh, cycles? ..Buying a battery without this minimal information is like buying a car without a service history or mileage on it. Will sell much quicker if you could provide that information.

Interested in the smart water valve....

Is there anybody out there who has registered a Goodwe 408D-ES in CT or anywhere else? I'm trying to register my setup in Ekhureleni and I'm looking for the CSIR test report certifying the inverter. Does anybody have one, or know where I can get it from?

How many cycles, SoH?

If you are specifically trying to match us3000A/B, You can add a type C to your setup by upgrading the older type A/B..No need to specifically get a type C.

Also remember that it's not ideal to keep a battery at 100% . So charge the battery, let the cells equalise and then discharge to 90 - 95% SoC.

Tech question: Is this not the maximum theoretical amount you could lose? The panels are only running at max output part of the day... I would in any case rather add the new ones onto their own string. Makes it easier to maintain, compare, fault find etc..

Just a thought. I was at a small factory complex and saw a trolley, on wheels that held 3 panels. They pushed the panels out of the shop into the sun in the morning and pushed back into the garage at night. Rather clever, I thought. You will need a decent voltage to test, depending on MPPT specs, so you might have to connect panels in series/parallel to test but 3 panels should cover most MPPTs..

I'd stipulate additional insurance be taken out to cover the adjacent buildings in case of fire etc..This can be restricted to fire caused by panels only, will save underwriting costs. As for annual maintenance: Does an annual maintenance schedule even exist, who will contract for an annual checkup? Just stipulate an annual checkup must be done at anniversary of install. Too many mentions of "high quality"..Either define "high quality" or stipulate equipment specs.