Recent content by GoneDiving

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    Why won't lithium balance in series?

    Thanks. This is exactly what I was referring to and explains it well. 👍👍 One more question: what about when there is no charge current? Lead tends to still even out voltages (I'm unclear if the cells self discharge to the same voltage or if higher voltage cells drain into and charge low...
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    Why won't lithium balance in series?

    Would someone please explain to me why lead technologies will self balance when cells are in series but lithium will not. Thanks
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    Parallel PIP5048MK's are tripping house RCDs

    My information from the manufacturer is that my MK model does have a fixed bridge. Again it's not a major concern for me but if it becomes one, I'll consider installing a MEN and manually open and close the bridge as required. Does anyone know if the bridge is a removable busbar (that can be...
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    Parallel PIP5048MK's are tripping house RCDs

    I didn't worry about it as I only wanted to plug the inverters in once to commission and charge the battery pack. It's for a boat that will very rarely be plugged in to a mains socket. Note that when I initially used one 5048 it did work as a charger while downstream of the RCD. It was only...
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    Parallel PIP5048MK's are tripping house RCDs

    Different models. Unfortunately, for other reasons, Ive got the MKs with fixed bridge. If it becomes a problem I can always open the case, find it and insert a contactor. Buy it's not an issue yet
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    Parallel PIP5048MK's are tripping house RCDs

    Yes. A similar reply regarding their MPI models: "sorry for the late reply. there's a menu in the monitoring software SolarPower that can adjust this. In Solarpower under setting “Shorten N/G relay in battery mode” if it is “Enable.” If “Enable”, inverter will short N/G in Batter...
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    Leaf build question.

    If you link parallel cells first then series them you will need very large busbars because there is only one busbar after each parallel group and these take all the output current. If you build series packs first, then link them, each series string shares the load. Each string then only...
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    Parallel PIP5048MK's are tripping house RCDs

    Thanks Roland For everyones reference, I've attached messages to&from PIP. Cheers "Hi, Is there a Neutral/Earth bridge within 5048MKs? If so, is the link automatic (depending on conditions) or configurable? I have two new 5048MKs wired with parallel kits. When AC IN is connected to a power...
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    How big of an inverter for your RV, Boat, or non house powerwall--Inverter Sizing

    I'm also setting up a solar generator system for my boat. I've used two PIP 5048MKs and 48 280ah Lifepo4 cells. Note that it's a pretty big system because it's a 54ft live aboard ex commercial trawler. Loads are a residential galley, dive equipment and a 7.5kw anchor winch (only intermittent...
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    Parallel PIP5048MK's are tripping house RCDs

    Thanks. I've wired the AC Input Active, Neutral & Earth to a normal house GPO ie after the RCD. My understanding is that when the 5048MK sees an incoming AC current it opens the internal G/N bonds on both inverters to make use of the house's at the switchboard...?? I suspected that the house...
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    Parallel PIP5048MK's are tripping house RCDs

    I have just connected my second PIP5048MK in parallel using the OEM parallel board and cables to find that whenever the Utilities mains is connected my house RCD trips. I originally had one 5048MK connected direct to the mains to charge and test the batteries and had no problems. It's only...
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    Cells not accepting current when balancing

    Thanks. The end use isn't actually a residential or Powerwall installation. It's to replace two 35 and 10kva generators on a boat. The whole package is: 5kw solar panels 48*280ah Lifepo4 for 43kwh at 48v 2*PIP5048 inverters for 10kw 230v single phase 15kw 230v VFD to power a 3 phase hydraulic...
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    Cells not accepting current when balancing

    Thanks guys. Yes, my operating range will be around 3.00 to 3.40 per cell. Having said that, I would like to top balance all cells once at 3.60 so that I have a margin of safety knowing that one cell won't be over charged should pack voltages over shoot for what ever reason. All cells have...
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    Cells not accepting current when balancing

    I've received 48 280ah Eve Lifepo4 cells. I'm attempting to balance them all in parallel at 3.40v using my 20a power supply. However, the parallel string is only accepting ~8a at 3.40v. The batteries were received at 3.30/.31v with two at 3.28v. Charging at 3.50v gives ~15a, 3.60v gives the...
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