Search results

A number of local sellers here in sunny Thailand are selling Deye SUN-5k-SG01LP1-EU for about 43,000Baht other sellers have the LVtopsun SUN-5K-SG03LP1 which looks to be the same/similar unit for about 38,000 Baht. From the photos the units are "identical". A few sellers are advertising the...

This popped up on another forum, interesting concept. The U.S.' aging infrastructure is struggling to keep pace with the rapid growth of renewable energy. IEEE: improvements and replacements to the grid’s 8,000 power-generation units; 600,000 circuit miles of AC transmission lines and 70,000...

For those in "less than connection friendly" environments. Is there any mileage in adding a smear of silicone grease to the O-ring and/or cable glands?

We always say that when connecting batteries in parallel that the cable length to each battery should be "the same". This is, of course, very sensible advice. But, just how much difference in length (as a percentage of overall) is actually acceptable? Would it be wise to actually have spare...

Background Myself and JAS live about 20km apart as the crow flies, at this time of year in Thailand there's no localised storm activity so we get broadly similar weather. Although our systems are of different capacities the panels are oriented in roughly the same direction and angle. We also...

This came up in conversation with a friend. He's got space for 18 panels but one or two of them get shaded at various (different) times of day / year. He was thinking that the 2P9S would behave like "giant" half-cut panels (or even better if he actually used half-cut panels). Any thoughts on...

My local source here in Thailand of decent quality 32650 LiFePO4 cells has dried up, everyone is selling cheap junk ("5,000mAh" cells that test at <2,000mAh). Does anyone have a recommended AliExpress / AliBaba source? I'm looking for a few hundred cells.

Not actually any smoke but a bit of a tale of woe. Our 5kW Sofar HYD5000 hybrid inverter is just over a year old and has generally performed as expected. Over the past few months we've been getting the occasional "unrecoverBusOVP" error (bus over-voltage), it would go weeks with none and then...

Thread title says it all really. Do I have to place optimizers on every panel or just the ones with shading issues?

Looking at some DC MCBs. Tomzn are a well-known (at least in Asia) Chinese outfit, mid-price, sensible quality but I'm a bit confused by the markings on this MCB. Note the +/- polarity markings + is on the right at the top, + is on the left at the bottom. Units from other manufacturers are...

Our outside floodlights have a 150W solar panel feeding a 20A PWM charge controller and about 30Ah of 12V LiFePO4 batteries (batteries are made up of a motley selection of 32650 cells acquired over the years and sorted for capacity). The lights themselves are cheap Chinese 12V 10W LEDs with...

I can get these BYD packs for around 400 US here in sunny Thailand, no BMS but that's no issue. Any thoughts, obviously well used at that price but even if they are <75% of original capacity they can't be bad, or can they?? All thoughts welcomed.

Not sure if this has been widely reported (I'm not in the US). https://e.vnexpress.net/news/industries/us-waives-tariffs-on-vietnam-solar-panels-4473116.html Joe Biden has waived tariffs on solar panels exported from Vietnam and three other Southeast Asian countries for two years amid rising...

This popped up on another energy forum when discussing DIY grid-tie. A member was discouraging anyone going DIY grid-tie because "they would end up in jail when a line worked died due to their mistakes". The counter of course is that "all" (ears because there are people out there who exist...

Bell Labs’ solar PV panel, presented in 1954, came not out of nowhere. The silicon solar cell had its roots in less complex devices that could produce electricity from either light or heat. George Cove presented his first “solar electric generator” in 1905 in the Metropole Building in Halifax...

Has anyone found a way to get the Daly BMS software (PC) to start with a specific serial port selected and opened? It's just a bind to select and open the port each time.

My 48V "200Ah" LiFePO4 pack (used golf cart cells) is going well, I'll be adding another soon. Current (ouch) protection is the 100A BMS and a 60A DC MCB in the battery combiner box, one MCB per pack. I'm happy that external influences are well dealt with, but having seen some of the...

So as a noob here I suppose a bit of showing and telling is in order. So this is our recently upgraded system. The 6kW grid-tie system on the left was our original install, the 5kW hybrid on the right is new. Like much of the world anything labelled as "solar" means the price gets...

Please note, we are located in sunny (actually rather wet at present) Thailand so any deals discussed probably won't apply, sorry. I first mentioned these cells in the Internal Resistance thread https://diysolarforum.com/threads/cell-internal-resistance-what-does-it-mean.9274/post-300507 , but...

We live in a relatively high lightning area (central Thailand). We have a big (100kA) surge suppressor on the incoming supply (overhead cables) and I have 40kA suppressors on the mains next to each of my two grid-tie inverters. There are also DC suppressors on the solar string inputs. The...

Our 6.5kWP grid-tie solar is working fine, it just sits on the car-port and offsets our bill nicely. Note that we are located in sunny Thailand so regulations are somewhat more relaxed than many are used to. Our grid tie is currently net-metering (spinning the conventional disc meter backwards...