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Gandalf

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Gandalf last won the day on January 26 2022

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  1. It is far better going for a 48V system straight away. I made the mistake years ago of going for 24V, thinking it would be sufficient, but it cost me so much more to upgrade when it ended up too small for my needs. Even if you go for a 3Kw inverter, still make it 48V. To buy a bigger inverter is cheaper than buying a bigger inverter and battery. Honestly, from my experience a 5Kw inverter and 5kwh battery in 48V would be your best deal for the price.
  2. Hey man, the way new laws are constantly being added these days, I would not be surprised! I haven’t seen the installation yet, but I think it warrants an inspection. I absolutely agree with a decently sized DC breaker and/or fuses. I will also check the cable being used. I have seen far too many newbies using “twinflex” as PV cable. Thank you guys, at least I have some sort of clarification on the matter. I have never heard of anyone getting a COC for a low voltage system that runs lights and a fridge.
  3. Hi Guys. My uncle had two solar panels fitted to the roof of his caravan and has the wires running down to a charge controller (not sure of the make) and from the charge controller to a 12V battery. This battery is for lights & a fridge. Everything is DC. He asked me if he needs a COC for this installation and I really couldn’t answer him. Can anyone assist with an answer please?
  4. Maybe I am wrong here but my guess is that the voltage (20-30V) is insufficient to charge the 48V battery. Just like a solar panel putting out 30V would not charge a 48V battery. It needs to be 52V to start charging. The reason no amps are showing is because there is not yet any charging taking place. It is unlikely to be a polarity issue as the three wires of 3-phase wild AC from a turbine can be wired in any order on the AC side. Only the DC side would be polarized.
  5. Thanks for clarifying Sadly the inverter is many years old and thus long out of warranty. But he is considering moving over to Sunsynk while the price is so good.
  6. Thanks for your reply Coulomb. When you say fix it, do you mean remove one panel so the inverter only sees 401V (317V in theory) or do you mean literally take the inverter in for repairs to calibrate the MPPT?
  7. Hi All I am helping a friend with adding panels to his Synapse 7.2M+ Inverter. The panels are 545W Astro 5 Semi with a VOC of 49.90V, connected in 8S1P configuration. In theory the panels should total 399.2V in ideal conditions. Doing pre-connection checks my multimeter gave a reading of around 370V before any load. When I turned the DC breaker on the Synapse gave a voltage reading of 459V!! (Maximum for this model is 500V) In the picture below there is a side by side reading of my multimeter and the synapse with a difference of almost 100V! Should I be worried about this or should I trust the multimeter reading and the sticker on the panels? What happens if the Synapse “sees” over 500V coming in? Technically it would only be 400V, but can any damage be done with this incorrect reading on the inverter?
  8. I have a friend who has an 8Kw Deye. I helped him install it. The strange thing is that when the CT is installed the correct way (the arrow pointing toward the inverter) the icon on the screen shows power being exported when it is in fact being imported from the grid. In the manual I read that if the power appears to be going the wrong way, try turn it around. So now, with the arrow pointing toward the DB, the screen shows the power going the correct way.
  9. This also a good suggestion. I built a battery for a different friend of mine to go into his golf cart. It is coping very well.
  10. This sounds like a good idea, thanks for the advice.
  11. I don’t have all the info, but he has a 48v Victron inverter. I know there is an air conditioner, fridge, TV and induction cooker inside the van. I’m not sure if the wattage, but I’m sure he would have sized it accordingly. All he wants is a lithium battery that can withstand the vibrations and bumps without cells coming loose inside.
  12. Sorry guys, I wasn’t too clear about this. He wants to power an inverter with a few 220VAC items inside the camper.
  13. Hi Everyone A friend of mine has a big diesel bus that he converted into a camper van. He asked me to recommend a lithium battery that can withstand the vibrations during idling and off road bundu bashing. I can only think of Sunsynk, but even then, I’m not sure. Does anyone have a better recommendation? Thanks guys.
  14. How much do you want for this inverter?
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