diy solar

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  • Post in thread: Must vs Growatt

    must is some doggy Chinese manufacturer stealing technology from wherever
  • Post in thread: What size system?

    Solar Panels are cheap now, but keep in mind that montage materials are expensive, the smaller the panels the more flexible but also more work! to calculate your battery size and panels needed there is a nice excel spreadsheet to download in this forum...
  • Post in thread: can 2 different Hybrid inverters on one battery bank supply 2 independent AC Circuits?

    both mentioned hybrid Inverters contain solar mppt Chargers, so yes they will be on!
  • Post in thread: Canbus SOC for Pylontec and MUST Inverter possible ?

    Thank you! Unfortunatedly Must does not reply to support intents! The pylontec reseller recomends me to buy a different inverter that runs with pylontec and scrap / sell secondhand the 1,5yo Must crap!
  • Post in thread: cheap Mppt any good ?

    its never colder than plus 10 Celsius here and I am aware of the maximum voltage problem. 160 Volt input is good for 3 panels 72 cells in series, and nearly 60A should be produced by 4 Strings. So theoretically ina a 3s4p configuratiion that would be >50 Amp >100V over 5000Watt, to good to be true!
  • Post in thread: cheap Mppt any good ?

    I found this cheap MppT on amazon https://amzn.eu/d/7DdsNbj does it serv me for 3s4p poly 230W 36V 8A PowMr MPPT Charge Controller 60 amp 48V 36V 24V 12V Auto - Max 160VDC Input LCD Backlight Solar Charge for Vented Sealed Gel NiCd Lithium Battery【Software Update Version】(MPPT-60A)...
  • Post in thread: Eg4 6500ex48 wifi connection issues

    watchpower.exe 1.14 on win7 also says 12345678 wrong password on windows it doesnt find the must PV1800 VHM on com 8 but solarmonitor.exe can communicate with the cable usb to inverter on COM8
  • Post in thread: Solar Assistant - data logger

    The difference between Watchpower and Solar assistant is huge, its like between a Diesel-Polo and a Tesla! Both bring you from A to B but at a different cost! The advantage you get from Solar assistant is that all the enthusiasts enjoy controlling the output very hour and that makes them feel...
  • Post in thread: High Voltage (HV) battery from 4x 16s(48V) in series?

    I have chatted with some guys that take the complete 36V Lithium packs with BMS from 20 brand new Bird Scooters they bought cheap from some doggy gipsy here in Malaga. Similar to this https://www.ebay.com/itm/224949859447 but at 25€ per piece. 36V Battery 20Ah 18650 lithium battery pack 10S3P...
  • Post in thread: Solar Assistant - data logger

    Solar Assistant has a power management function? Interesting, I have AXpert 4 But it only changes the priority, what I want is control multiple SSR switches
  • Post in thread: Help needed with MUST 5kVA Inverter

    I am running it without canbus now as battery user type to cut of with 48.5V
  • Post in thread: High Voltage (HV) battery from 4x 16s(48V) in series?

    as in my understanding a HV Battery will be more likely to brake as it has a lot of relatively small cells in series and the BMS system needs to be specially adopted to that high voltage. If your power demand is not higher than 6000kVA I see no use to go away from the 48V Standard where you can...
  • Post in thread: Growatt spf 5000 es using dry contact to switch to grid by relay.

    why you don't link your video over that I already have seen?
  • Post in thread: Canbus SOC for Pylontec and MUST Inverter possible ?

    dear friends I need to know what lithium battery can cooperate via CANBUS with my must PV 18-5048Vhm to use the options 28 (29,30) control BMS via SOC in the Must's Menue As I understand the SOC Shutoff would be more reliable and effective than a voltage controlled shut off with no load...
  • Post in thread: Does the SPF Growatt 5000 ES Really work the way it's advertises

    yes I run 10kVA house with 2 spf5000es and 20kWh Lifepo4 and generate up to 50kWh with load management , zero injection too much administration
  • Post in thread: Help needed with MUST 5kVA Inverter

    I investigated the pylontec and the cheap batteries don't support CANBUS with any inverter only the bigger models some
  • Post in thread: Growatt SPF 5000 ES Wiring for 0 Export / Need help

    it always will be zero export as an off grid inverter and can run the house with no power line from outside as long as battery or solar is sufficient in SBU mode
  • Post in thread: Help needed with MUST 5kVA Inverter

    I did not connect the cable from pylontec batterie to Must inverter as I was adviced not to, but I connected an old laptop to the MUST PV1800 to monitor and set paramenters. The cable is a long printercable and you need a software seriell to usb CH340 The only program that recognises the...
  • Post in thread: Must vs Growatt

    the Inverter won't overcharge or unload the battery excessively if user mode properly configured, but with Voltage control you have to leave some security margin to not stress your batteries too much (what is recommendable any way) In my case the second Inverter AXPERT does understand and...
  • Post in thread: Solar Assistant - data logger

    On the developers page https://solar-assistant.io/help/installations/axpert-parallel-pylontech they say must solar pv1800 works with Solarmonitor
  • Post in thread: Help needed with MUST 5kVA Inverter

    the manual of my MUST PV 1800VHM has options 29,28,30 that say is specially for lithium
  • Post in thread: Help needed with MUST 5kVA Inverter

    My 5kW Must Inverter is already broken and for sale, or maybe someone can fix it for me small priced? You can come for a holiday and do it here, have all tools and spares. Main disadvantage is the low mppt range and bad software but for a boat or caravan it might be good
  • Post in thread: Hacking the new Growatt WiFi-F modules

    hello , I know it s 2 years gone but I still have this Problem, I am 62 and started with Visual Studio Code and platform IO and Github just to get that SOC% into Homeassistant and control the loads, any help would be great! Visual studio is hanging for ever after it urges me to commit! what I...
  • Post in thread: Growatt server based statistics good ?

    so you buy the raspberry Pi 4 and the Solarassistant software? can it control loads as well
  • Post in thread: Growatt SPF 5000 ES - 3 phase parallel setup power consumptions

    Interesting
  • Post in thread: Growatt SPF 5000 ES - 3 phase parallel setup power consumptions

    I recommend changing your house to one fase if you are under 15kVA as the asymmetric load is no problem for your provider but for your inverter
  • Post in thread: Growatt SPF 5000 ES - some questions

    You need to change everything to one phase and run 2 or 3 or even more growatt parallel
  • Post in thread: High Voltage (HV) battery from 4x 16s(48V) in series?

    I don't see any advantage of an HV Battery unless you can build it from semi new rental scooters for very cheap. The reliability decreases with every cell and every BMS so you end up with a very short life cycle of maybe 3000 loads that will increase the cost. To increase reliability you will...
  • Post in thread: 2 groups of diverent panel on only one Mppt

    Thank you very much for your speedy reply! I will continue to buy some electricity or / and extend my Solar Production. We live in Marbella, Southern Spain with 330 to 340 days of sunshine per year and mild temperatures between 10° and 30° Celsius. The picture shows the big new 6 mono panels...
  • Post in thread: Using Inverter Generator to Charge Batteries: Growatt 5000 ES

    I use shelly Em for automatic overload cut off from low priority consumer
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