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In case there's any interest, I just got done designing these breaker handle markers, so instead of my instructions being: Turn off the Grid breaker Turn on the Inverters it can be: Turn off RED and turn on GREEN. As I'm usually not around when something fails, and we're starting the 'document...

I've got a few of these Eco-Worthy 12V submersible pumps: https://www.amazon.com/gp/product/B01N4EMBBJ which is a very close clone of a Shurflo 9300 at 1/10 the price. I've got two in service, and one that's failed in ~6 months of occasional use to fill a cistern from a nearby well with a total...

I've got some Q-Cells Q.Pro BFR-G3 260 260W (60 Cell Poly) panels that are closing in on 9 years old, and still appear to be working well. I'm looking at moving them to another inverter (probably EG4 18Kpv) Their original specs: 8.99A Isc (8.45 Impp) 38.00Voc (30.78 Vmpp) As panels age, does...

I have a number of 48V (and a couple of 36V) lead-acid golf carts, and I've just converted one of the 48V carts to (2) https://alliedlithium.com/products/allied-lithium-48v-x-30ah-batteries batteries. And have discovered (in addition to the inaccuracy of the supplied amp-hour-counting meter...

I've got a Bad Boy Buggies 48V 4WD golf cart with eight Trojan T-145 batteries https://www.trojanbattery.com/products/t-145-6v-flooded-battery so 200AH(ish) and 576 pounds that I've been contemplating converting to lithium. After noodling around with drop-in replacements (Allied Lithium still...

I'm looking to add some solar panels to the roof of my 'garage', which has sections mostly facing east and west: (Yes, pressure washing and painting is first!) So I'm looking to see what my options are. I can do it manually (while the roof sections are trapezoidal, the 'square' pieces are...

Is there a consumer level power quality device that will allow me to monitor my grid (and inverter)? I’ve got a number of devices for instance, that tell me the grid frequency, one I built myself from a Raspberry Pi Pico and a zero crossing detector eval kit, and I know there are crazy expensive...

I've got two EU3000 generators that I can parallel to make 6KW (5.8 continuous) at 120Vac. This has worked fine when I could connect them both in parallel to both phases in my breaker box and only run 120V loads. But now I have HVAC splits and other 240V loads that I'd like to run, and I'd...

My "HOA/Power Co-Op" has recently passed rules against Net Metering (because reasons), and the power quality of our grid keeps getting worse (frequency excursion of +/- 5 Hz(!), etc), and my many individual UPS batteries need replacing, so it's time for the Whole House UPS paradigm, and...

I'm going to have two General Electric THQL21100 Thick Series 2-Pole 100-AMP Circuit Breakers like https://www.amazon.com/gp/product/B000BQKDDW feeding a load center as an AC Combiner. I'd like something to connect the two breakers together so they both turn on and off at the same time, so my...

I’m looking for an app or a website that would allow me to make electrical drawings. I just want to be able to draw up things like my transformer, the meter, my main feed, my grid breaker box, my AC combiner/output box, and a few other outputs. Does such a thing exist? I really don’t want to...

Just to be able to diagnose potential problems faster, I’d like to be able to detect RSS signals, but the Tigo RSS Detector is $300, which kinda exceeds my ‘nice to have’ budget. Is there a cheaper alternative? I mean, just detecting RF at 120 to 150 kHz would probably tell me if there is a...

I'm moving my 25KVA grid transformer about 100 feet to be closer to the free-standing garage (boathouse) where my solar equipment is (and my batteries will be RSN). This will require adding about 200 feet of mains cable to get the new feed down to where the transformer/meter was to splice into...

I've got a golf cart charger from Allied Lithium that puts a fixed 15 amps into a 48V battery, and (for instance) over the course of 191 minutes where it put probably 2.3 KWHR into the battery, it drew 4.5 KWHR from the wall, for an efficiency of around 50% AC->DC. Is this normal? Is there a...

I get that Bigger Is Better, but what if I wanted to build a small (10AH?) LFP battery (12V? Expandable to 48v?) just to get my feet wet without breaking the bank? I don't actually have a _need_ for such a thing, but this forum isn't about need, is it? 8*) I keep seeing stuff like...

If a battery spec says: "8000 cycles at 80% DOD at 0.5C" Is there any way to guess how many cycles it'll do at 50% DOD or 0.25C, or elevated temperatures, or any combination thereof? And yeah, I know that's 22 years, and I'll be lucky to be around then (yikes!), just curious how the lifetime...

Has anyone tried installing solar assistant on a raspberry pie five? I realize it’s probably overkill, but also I’d like to start out with the latest greatest and not have to upgrade or worry about reliability issues in the future. Thanks!

Amazon and AliExpress seem to have a lot of options in this space, if I just want some basic power supply and load equipment that will go up to 60 V DC at couple dozen amps, are there any recommendations for decent stuff? I’ve got a really nice Tektronix bench supply, but it only goes to 30 V...

Another thread opened the question of clearance on the PP batteries, some of which is driven by the ability to see the display and operate the controls, some of which is driven by ‘code’ which is a whole nother rathole, and some of which is for ventilation. How hot does the PP battery get in...

I've got a really weird problem that I'm trying to search out the resolution of, and it appears to start with the MSDS for LFP batteries and a dangerous goods declaration to my shipper. Since my order includes EG4 PowerPro (Outdoor) WallMount batteries, I was asked to submit MSDS and Dangerous...

My Favorite Wife is talking about putting a small solar power system at our Tiki hut on the beach, to get Internet for WiFi, a camera, and maybe a small cooler. I've got some https://signaturesolar.com/grape-solar-100w-12v-solar-panel/ 100W panels, and I can get lightly used lead-acid golf cart...

I've got some panels (38Voc, 9Asc) in 3 strings of 15 panels each, so 570Voc and 9Asc. They currently go into a DC combiner at the array and run about 100 feet into a single-MPPT inverter, so 570Voc and 27Asc. Now I want to feed the array into two separate parallel inverters, 2 strings in...

I've got an Allied Battery conversion for one of my golf carts, and it's got a charger with an Open Circuit Voltage of 58.73 volts and a current limit of 14.7 amps. I've just started unpacking my (six) EG4 PowerPro WallMount Outdoor batteries, and starting to figure out how to connect them in...

I’m about to install an EG4 ESS system comprised of two 18 Kpv inverters and six power pro outdoor batteries in a detatched concrete ‘garage’. Some of the recent threads on fires and other anomalies have made me consider that it would be useful to have a fire detector with a normally closed...

There are a lot of inverters and panels out there, and I'm trying to nail down some details. I have an SMA inverter and except for some fiddly little engineering details, I'm pretty happy with it, and open to using SMA for my expansion, so I'm looking at the Sunny Boy 7.7-US, which has three...

I’ve got four golf carts with various combinations of flooded lead acid and LFP batteries, each of which is on the order of 3-10 kWh capacity. I am about to install six EG4 PowerPro wallmount batteries for a total of ~86KWHR LFP storage. Obviously I can charge my golf carts at night by the...

I've got (2) EG4 18Kpv inverters and (6) Wallmount batteries on order, so while I await delivery, I'm reading the manuals and watching videos, and it struck me that firmware updates look to be way harder than they should be. It _looks_ like I can do the inverter firmware updates if I'm...

I’m getting ready to have some AC combiners installed and I’m trying to remember if it’s bad (or against code?) to have AC breakers in series? For instance, a box with 200A main breaker and a 200A load breaker feeds another box with a 200A main breaker. Does that work or should some of these be...

Any recommendations for a DIY battery box that's rated for outdoor use? Splashing through the puddles gets wet sand all over my existing batteries, and I just hose them off, so IP65 or better? This is a Big Cart, and I'd love to have a mobile battery, so 280AH range for cell sizes. Thanks!

I’m having my grid transformer moved, and I will need to splice some wires for my 200 amp feed. My electrician is talking about using split bolts, but I saw a video on a supply side tap that looks like it could work even better. I’m finding smaller ones on Amazon, but where would I source larger...