Wrenches Here is just a thought, each module is either 2, 3 or some with 4 strings within a single module, so you open the junction box remove the diodes and cut the buss jumpers, reconfigure the box to a single longer string to multiply the voltage and equally divide the amperage. you will need to keep the new VOC and VMP within the usable range of the charge controller. Of course this will void any warranty of the module, also be aware of higher voltage when exposed to sunlight. In the past I was involved in military grade manufacturing of foldable modules designed specifically for systems with no charge controller but this is a down and dirty solution. Just a thought
I On Mon, Apr 12, 2021 at 1:52 PM Jason Szumlanski < [email protected]> wrote: > I considered a 96-cell panel, but the highest watt panels don't compare to > new 72-cell panels coming out in the 400+ watt range. It's a good fallback > position because I might be losing more in the conversion than I am gaining > in the higher power output. > > Jason Szumlanski > > > On Mon, Apr 12, 2021 at 2:23 PM Kent Osterberg <[email protected]> > wrote: > >> Jason, >> >> Would a 96 cell Panasonic module fit in the space you have available? It >> would give you sufficient voltage to charge this battery. >> >> Kent Osterberg >> Blue Mountain Solar >> >> On 4/12/2021 10:40 AM, Jason Szumlanski wrote: >> >> I want to charge a 51.2V LiPO battery with a single 420W 72-cell module. >> Vmp is 40.14V. >> >> It's one of those situations where I just need a lot of battery capacity >> as a backup for a specified time period, but it doesn't matter how long it >> takes to charge it back up. And I have space for exactly one 72-cell module. >> >> It's going to be a Victron inverter. I'm not sure if they make a DC-DC >> solution for this charging scenario or if there is another way to >> accomplish it without too much cost and complexity. I was half-heartedly >> thinking about an AC coupled microinverter, but that has drawbacks in terms >> of efficiency I think. Maybe that's not any worse than DC-DC conversion - >> I'm not sure. AC Coupling would probably be cheaper and easier. Monitoring >> might be difficult/limited. And AC coupling would require that the inverter >> be on (inverting) which isn't ideal for this situation either. >> >> Thanks in advance, >> >> Jason Szumlanski >> Florida Solar Design Group >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & >> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> <https://mailtrack.io/trace/link/ee57a11416ed71e7b728797aa2b97ece3a5f03ca?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=0a99a5fa00c5e50e> >> >> There are two list archives for searching. When one doesn't work, try the >> other:https://www.mail-archive.com/[email protected]/ >> <https://mailtrack.io/trace/link/9118698e34417bda3b2a7a0c71028e5988fff6f7?url=https%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2F&userId=1613865&signature=37458f340e0ff03a>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> <https://mailtrack.io/trace/link/c4673ac9bd8ea50844c2357e03a050d586498f3e?url=http%3A%2F%2Flists.re-wrenches.org%2Fpipermail%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=6aecce0afef0aa74> >> >> List rules & etiquette:http://www.re-wrenches.org/etiquette.htm >> <https://mailtrack.io/trace/link/11c0e7c7b2dae65772dc303c08f0a2c617b76dc2?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=b8e56d63388a8e61> >> >> Check out or update participant bios:http://www.members.re-wrenches.org >> <https://mailtrack.io/trace/link/4a17b3355c6fb1198d464e14902e76e42dca3142?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=583520a3d733c417> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <https://mailtrack.io/trace/link/7a17b47a6ba1a036493e686171fe727c36be4dff?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=219d48c9d6b9dc65> >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> <https://mailtrack.io/trace/link/1260c603ea6c23f677c5e2be06cb14a80391a36a?url=https%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2F&userId=1613865&signature=e21a6fd1f3ed4005> >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> <https://mailtrack.io/trace/link/faccc39db7ab2df6792660d963f44fa88519c3de?url=http%3A%2F%2Flists.re-wrenches.org%2Fpipermail%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=191537b1b4819891> >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> <https://mailtrack.io/trace/link/4a0d10ed0315233c46833783256309caa77970a3?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=3be9a9dff725ed98> >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> <https://mailtrack.io/trace/link/bd0147fba8ebfd2ffd31ecdcba1d612324cf525a?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=9d70d5812107ab50> >> >> _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
_______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/[email protected]/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
