Anybody have experience with these relatively low cost 48V chargers? I was considering getting one as a backup unit.
Like this. There are many similar ones out there...
https://www.ebay.com/sch/i.html?_nkw=135185554533&_sacat=0&_from=R40&_trksid=p2332490.m570.l1313
I'd be interested in recommendations too. A basic bare bones charger to have on hand as a backup for a 48V 16 cell 280AH LiFePo4 battery. Pretty bare bones.
Thanks, Dan Pfeiffer
Monday, May 12, 2025
Re: [electricboats] Solar system on a sailboat for 96v battery?
What about this? Split the battery pack in two and charge each half at 48V with it's own controller.
Kinda like center tapping a transformer but center tapping the battery with the negative side of one charger and the positive side of another charger.
If you program both chargers the same, feed them with equal length wires from bus bars that are fed from all panels, and have a 16s balancer, I think it could work.
Those Genasun GVB-8-Li-56.8V-WP are almost exactly what I need for my boat, but they are only rated at 8A (while saying that people have been using them up to 9A without issue). My panels Max Power Current is 10.72A while the Short-Circuit Current is 11.26A.
My panels are only 370W with a VOC of 41.4V (Vmp of 34.5V) and I have been trying to figure out a way to mount 3 of these panels when I only have room for 2.
So at 405W I don't think the OP could use these (let alone the fact that the highest voltage I see for these is 62V).
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Re: [electricboats] Solar system on a sailboat for 96v battery?
Maybe a simpler solution is to arrange the 4 panels into two strings of two panels in series. Each string should have its own charge controller. That avoids the DC-DC converter, and gives some tolerance for partial shading.
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Sunday, May 11, 2025
Re: [electricboats] Solar system on a sailboat for 96v battery?
Genasun make a MPPT boost controller for 48V LiFePo4 see Genasun GVB-8-Li-56.8V-WP, I've got 8 of them on my boat. One per panel.
--
Regards,
Paul J. Thompson
IT Manager - Bathroom Direct
(W)09 913 3110 (Mob)021 275 5001 (txt only please)
Regards,
Paul J. Thompson
IT Manager - Bathroom Direct
(W)09 913 3110 (Mob)021 275 5001 (txt only please)
You may want to go with a transformer.Or just 1 boost converter and a diode for each Solar panel.With the boost controllers I think you will loose the Mppt functionality of the charge controller, but I don't think that matters very much.
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Re: [electricboats] Solar system on a sailboat for 96v battery?
You may want to go with a transformer.
Or just 1 boost converter and a diode for each Solar panel.
With the boost controllers I think you will loose the Mppt functionality of the charge controller, but I don't think that matters very much.
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Friday, May 9, 2025
Re: [electricboats] Solar system on a sailboat for 96v battery?
One booster and one controller per panel is the way to go. That will minimize any shading issues.
I have the sailboat kit from Thunderstruck-EV, configured for 96v upon their advice for my power needs. Had I known the grief it would cause trying to find the electronics for 96v, I would never have gone with this. Unfortunately, I've already installed he ME1616 and had a custom gearbox machined for it. It would cost thousands to reconfigure the system for two 48v motors at this point.I'm trying to set up the solar system rn, and wondering if anyone else has done this. I bought four Hyundai panels, bifacial, 48VOC. I thought I was going to just hook them up in series, but it's been pointed out to me that partial shading of the solar array would shut the whole thing down. So, as a starting point, I made a design:Having a heck of a time finding a DC-DC converter with a ~100v output. Saw one on Amazon, (DROK DC Boost Converter 900W) with a prominent warning label about frequent returns.Maybe I'm going about this the wrong way. If anyone has done this, would greatly appreciate your advice.
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[electricboats] Solar system on a sailboat for 96v battery?
I have the sailboat kit from Thunderstruck-EV, configured for 96v upon their advice for my power needs. Had I known the grief it would cause trying to find the electronics for 96v, I would never have gone with this. Unfortunately, I've already installed he ME1616 and had a custom gearbox machined for it. It would cost thousands to reconfigure the system for two 48v motors at this point.
I'm trying to set up the solar system rn, and wondering if anyone else has done this. I bought four Hyundai panels, bifacial, 48VOC. I thought I was going to just hook them up in series, but it's been pointed out to me that partial shading of the solar array would shut the whole thing down. So, as a starting point, I made a design:
Having a heck of a time finding a DC-DC converter with a ~100v output. Saw one on Amazon, (DROK DC Boost Converter 900W) with a prominent warning label about frequent returns.
Maybe I'm going about this the wrong way. If anyone has done this, would greatly appreciate your advice.
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