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.

Try getting the pylontech software and cable and then look at the battery using that, might give you more detailed information as to what is going on.

When PV production is > household use, just watch your electric meter, does it wind backwards, one can see the direction of travel if one looks closely and then check if your actual meter numbers also decrease...

Have you tried upgrading the battery to latest firmware? Does the sunsync see the battery full capacity?

I have a 200Ah battery where the spot welds on the cells(no studs) has come loose. Does anybody know who will have a decent spot welder to reconnect them or any suggestions on how to fix the welding?

Might be a good idea to get accurate cycle, soh for US3000B's and C's...Then people will know exactly what they are getting. E.g B's about 600 cycles.

Hi, you need a cable for US3000A/B and a different cable for US3000C. Are you using the correct cable? Can you see all the cells when you connect, voltages etc? Make sure you have the correct firmware for A/B and C. There are various versions for type C depending on motherboard version.

It's the BMS that's the issue, some only speak specific protocols which the inverter may not speak. The market has certainly changed over the last 3 years, even the last 12 months. Battery prices have dropped substantially, there are many brands and choices. Even the inverter market has grow, many new entrants, options. Frankly, in 5 yrs time the equipment one buys today will be outdated and you will battle to find batteries, inverters and panels that are compatible with it. High voltage, inverters/ batteries will become the norm.....Watch this space.

I'm interested to understand the purchasing decisions of solar customers.Seriously, I import lipo4 batteries. What was the motivation for buying these batteries? Were they inexpensive, good reviews, well known? There are many other brands that speak natively to sunsync, out-the-box. Was your Installer a major influence, did you get a choice of battery?

Can you please provide panel specs

Have you looked at other inverters or are you already decided on the Sunsync?