Lynx Distributor was not a total waste of money!
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- เผยแพร่เมื่อ 29 ส.ค. 2023
- In this video, I revisit my lynx distributor to add a 5v supply to make full use of the fuse monitoring lights.
DC-DC Buck Converter 12V/24V/36V/48V to 5V - amzn.to/45vXbMA
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Hi Rod, interesting video as always so thanks for sharing.
Speaking as someone who went with the modified Power-In approach, I'm curious what advantages having the fault LEDs gives you in practice? Is it literally just the LED indicators or does it also communicate back to the Cerbo GX to provide notifications etc? Also, would it not already be obvious if a fuse had blown by virtue of an inverter not running?
My own decision to go with the Power-In was largely based on an impulse purchase of a pair of Power-In units from 12V Planet at a low price of £140 ea delivered instead of something like £199 each for the Distributor. I knew I could power up the LED board using a 5V supply but just didn't see the utility for me. Also, because I wanted to use MEGA fuses on my battery connections as well as on the inverter and MPPT supplies, that meant two Distributors at almost £400 compared to just £280 for the Power-Ins.
So I have two Power-Ins bolted together with my three Pylontech US5000 batteries feeding in to the first Power-In and then my two MPPTs being fed from the second Power-In as well as my Multiplus-II 48/5000/70-50 inverter. I have a spare feed from each Power-In for future expansion. The batteries have 125A fuses each, with dedicated Pylontech battery cables for each module, and my two 250/60 MPPTs have 80A fuses. The inverter has the usual 200A fuse.
I know there are some who say the batteries should be dispersed across the bus bar rather than all at one end but I prefer to keep my batteries together for cell voltage balancing reasons. My MPPTs are between the batteries and inverter because they feed to both at different times depending on solar output and inverter load.
Thanks again - I'll be interested to hear how well it works for you.
Hi Craig, I actually recorded a bit where I explained this but ended up loosing it in the edit. You're correct, this only makes the LEDs work, you still have no connection to a GX device or remote monitoring. I only did this as I'd ended up with a distributer and thought it made sense to at least make an attempt to get the LEDs working. They would probably be more useful when monitoring fuses on one of the battery banks as they could potentially blow without me knowing, but as it stands one of the inverters loosing is DC supply would probably take the whole system offline so I'm probably going to notice that without the LEDs 😀
If I was buying again I would probably also just go down the route of 2 Power-Ins.
I'm just wondering .. why didn't you wired the batteries in 4x2 banks rather than 2x4 ? Whils you had the opportunity to hook them all in the lynx power in with 4 ports ?
That would defo distribute the load better ... I think ..
So, the reason for that decision was mainly about keeping things simple and cost-effective. Originally, I designed the system for 3 banks of 4 batteries. If I'd gone with one set of cables for every 2 batteries, it would have doubled the number of cables and fuses needed, plus require another power in. My plan is still to add a third bank, and the remaining ports on the power input and distributor are set aside for MPPTs.
I went with one set of cables because of the initial cost and to keep things straightforward. While it's true that a single set of cables can't handle the potential output of the batteries, the inverters at max would draw just under 200 amps, well within the cables' 100-amp spec on each bank.
Some might argue that having a set of cables for every two banks is more efficient, but I'm not entirely convinced it would make a significant difference. However, I appreciate the suggestion. When I expand the system, I'll certainly take another look at it. Thanks for bringing it up.
🎉🎂
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You will break your Cerbo by feeding it with 48V, it has a manufacturing fault.
It's fine as long as you fit the required electrolytic capacitor as close as possible to the Cerbo. There is a Victron document about this. It has been resolved for serial numbers from HQ2221 onwards as well.
Here is a link to the Victron bulletin for this: community.victronenergy.com/storage/attachments/42304-2022-08-cerbo-gx-power-supply-issue-in-48v-systems.pdf
I'd not come across this before, your comment is very definitive "you will break your Cerbo", from reading up on the issue it's more like a certain batch of Cerbos have a manufacturing defect that in a small and specific set of circumstances can cause the internal power supply to fail.
My Cerbo is included in the list of affected serial numbers and I've already acquired the capacitor Victron recommend to prevent the problem, even if the risk is small I'd rather have one less thing to worry about. Thanks for the heads up.
Another easy option is to use the Cerbo USB port to power the Lynx
The recent batches do not have the self destructive issue