wolfandy

No - separate strings When I did my system upgrade, I split what used to be my main string of 12x 380W panels and put each 6x East and West on separate MPPTs

I found my string towards the evening sun to produce relatively little - and would not do it again. I would rather place all panels into your morning sun. Your MPPT needs 150V to start up - and I would be concerned that with 4 panels you'll spend too much time below that and loose out on production

Have mine also wired as per option 2. No problem for the BMS as long as you have the batteries linked together

Thanks for the feedback, Leshen I am also experiencing 45W self-consumption from the batteries rather than 20W (also see here) Eventually it just becomes a numbers game. If you are running for 10h on grid during the night, then the draw will be about 0.4kWh from the batteries for the Sunsynk self-consumption. Depending on your battery size, this will result in a drop in SOC

Definitely 2 MPPT also on the 5kW You'll be surprised how quickly your consumption will grow - especially when the power is free 😉 Suddenly you will start running all the aircons in the house in the afternoon simply because you can

I thought the Sunsynk draws self consumption from batteries even when on grid. I have the same behavior on my units @Leshen: You are the expert - can you please advise?

Sunsynk 5kW To my knowledge (and to the specs on the Sunsynk website at a quick glance), the 8kW also only has 2 MPPTs. Only the 8kW though they have a higher amp rating (18A vs 13A on the 5kW)

I have not made any changes to mine. Can check in the morning on what they are set (but should be either 0000 or 1000) Am using the cable that came with my Sunsynk inverter. But I believe it is a standard network cable You can connect your Pylons both the the inverter and the Pi running SolarAssistant (with the respective cables). Then SolarAssistant will give you more detailed data on your batteries compared to only connected to the inverter

Steady as a rock. Have not had any problems Yes - see below I have 5x Pylon US3000 Everything connected to busbar (each inverter as well as 2x cables from Pylons)

Don't know the answer to that I did the firmware upgrade when I was making changes to my system. I disconnected each battery and ran the update on each separately

I went the SolarAssistant route to be able to do exactly that. Involves a bit of extra cost for the system, but negligible in the greater scheme. Allows me to view inverter data real-time (and not delayed as on my old Sunsynk dongles) as well as make changes to my setup from anywhere in the world

2x 5kW give you 2 extra MPPT over 1x 8kW I went that route for greater flexibility on the PV side

Anyone know the changelog for the new firmware? The Sunsynk team keeps ignoring the request for a changelog in their own forum...

😝 Before doing any other modifications to try and solve your problem, I would probably start by putting a new one in

How old is your actual earth leakage breaker? I had something similar a while ago, when my earth would trip randomly. Hunted around like a mad man, trying to find the root cause. Eventually my electrician replaced my earth leakage breaker (which was probably almost 10 years old) with a new one - and problem solved. He told me that as these things get older, they sometimes get more sensitive and start tripping

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Pylontech sets 37A for recommended charge/discharge current per battery. So for your current 2 Pylons, this is correct. When you have added your 3rd, you can set this up to 111A. But if I am not mistaken, this value is actually also taken from the BMS - and the Pylon dynamically adjusts this number based on where in the charging cycle the battery is

I have this on. If I remember correctly, it then first takes PV for loads and only pushed any excess PV into the battery. If off, it will prioritize charging the batteries - which means you end up using more grid

As @zsde already wrote, the self-consumption of the inverter is powered from the batteries - even if the system is running on grid Agree that your system is over-paneled and adding more batteries would help better balance the system (help get more out of your system). On your screenshot above, your battery is fully charged by 09h00 again, and after that your panels only have to power your loads. So for most of the time, you only draw 1kW from your 5kW of panels I'm not a technical expert, but to my understanding when you cycle through your batteries on a regular basis, then it is ok to charge them to 100%. It is only when hardly drawing from them (e.g., a laptop battery when the laptop is always used connected to AC), then leaving the battery at a lower SOC will help extend the life. I am drawing my set of Pylons down to 25% every night

Your setting is correct - my math last night was just off 😜

Unless you need to lock your battery cabinet, don't buy any of the ones from solar shops - they are way too expensive. Google for Samson SRK12 (for 4x Pylon) or SRK16 (for 5x) at much lower cost. And buy at least one size bigger than you need at the moment (as you probably will add more Pylons in the future) Yes, recommendable to get the batteries to a similar voltage. Do not be put off if the SOC shows different between the old ones and the new one for the first week or so You need to adjust the battery capacity on the Battery screen (from 144Ah to 222Ah) Everything else (e.g., max charge current) the inverter will pick up from the Pylon BMS

Same here. Made a significant difference - but these days my temps still sometimes get over 60 degrees. Ambient temperature in my garage is just too high... Yes, mine are on 24/7. I used a normal 12V power supply and wired the fan directly to it

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Successfully updated 4x US3000A to 3.4 (.bin) and 1x US3000C to 2.7 (.zip) using BatteryView .28 yesterday Used the latest files posted on this thread and followed the instructions as posted - everything done without a single problem Thanks to everyone here !!

Item: Jean Muller KETO Battery Disconnector with 80A Fuses (x2) Age: 3 years (but only in use for approx. 1 year) Price: R400 Payment Method Accepted: Cash, EFT upfront Warranty: None Packaging: Will package safely for shipping Condition: Good Location: Somerset West Reason: Changed system around, no longer needed Shipping: At buyers cost and risk Collection: Sure Link: Jean Muller KETO Battery Disconnector with 80A Fuses