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I apologize if this is the wrong forum - so I'm not complaining if mods just delete this post - if it is. I've been having trouble with my old BMS, and so have another small one controlling the contactors right now. I would like to just replace that setup with a JK. If you have a 200A JK you...

I have a bunch of individual batteries I've made that I can attach or detach from my main house battery and are 48v (~51.8v nominal 14s). I've been using an individual "pure sine wave inverter" and boost mppt charger when I use it on the road, but am going to replace those with an AIO inverter...

I have a couple of twin hose portable AC/Heat Pump units. I live about 90 minutes East of Vegas. It’s not like this isn’t a common thing with large facilities compounding evaporative cooling towers with refrigeration cycles, but I thought I would experiment a little with the unit in my garage by...

I’d imagine an actual UL9540 ESS makes this more straight forward, has anyone had to comply with this for Lead Acid batteries? I’m already wiring an E-Stop button to the RSD and inverter power button circuit (with relay), I have a bunch of Tyco EV200 contactors. I hope wiring one in series in...

I’m in the process of converting my illegal install to a legal. I have four strings wired straight to a junction box under a panel, I’m adding tigo modules for rapid shutdown, which seems to satisfy 690.13, but I’m confused by 690.15, do I need to add a physical disconnect or rapid shutdown...

I'm going through the process of making my system legal and have been running a Deye hybrid inverter for a couple of years with my Nissan Leaf based battery, preliminary talk gave me the impression they probably wouldn't be okay with the battery even though we are IRC 2015 and NEC 2017, so I...

I’ve seen Square-D QO based load centers used with their UL and Square-D certified ratings used in DC applications: https://www.se.com/us/en/faqs/FA95999/ https://rexel-cdn.com/Products/B26D...711A/B26D5EDB-DE42-4F3F-B367-3401D50A711A.pdf I wonder if anybody knows of any other relatively...

I’m looking for a small 48V all-in-one inverter that also have usb-c rapid charging ports, other than the pre-packaged battery generators I can’t really find something. It would be a nice product for those of us who still like to make and control our own batteries.

https://www.pv-magazine.com/2021/11/26/solar-heat-pump-solution-for-water-pool-heating/ Like many of you, I've been interested in solar, heat pumps, geothermal, etc. for a long time. I've been planning to build something like the product linked for years, where I put some pex/aluminum heat...

I have a used MPPSolar LV5048 with cables/manual/cd. I don’t have the box but would figure out one for shipping. I purchased it in May of 2020 from watts247.com for $1362.00 and have been using it experimentally for projects - I have only been using one of the charge controllers for a 1500W...

Does anyone have experience using the Sub mode with the LV2424? My brother-in-law does cryptocurrency mining and I'm looking for a relatively inexpensive way to subsidize his power usage. I haven't had good luck with those blue Deye (eco-worthy) GTIL2's, I bought two and one died after two...

I've opened a couple of Leaf batteries now to make mine, and something I'd like to try is using a HVDC string (with MPPT optimizers on each panel for reliability :-) direct to a Leaf battery (need some electronics to interface with the battery and enable it), and then using a batteryless...

I’m getting ready to move all my breakers to a subpanel, to properly have grid power go to my Growatt 12000t and then to the subpanel. I’m going to use a 100A breaker from the main panel and 2awg wire to the inverter, and then 2awg wire from the inverter to the subpanel. The inverter has a 80A...

Does anyone know of any inexpensive Chinese equivalents? I have a non-AC coupling low frequency off-grid inverter, and Legion seems like a good way to increase capacity, even for my application.