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https://www.zerohedge.com/commodities/lithium-prices-plummet-global-supply-concerns-diminish "battery-grade lithium carbonate in China has plunged from $84,500 per metric ton to $42,500, or about a 50% decline, according to Bloomberg data." This surplus is expected to last for years, hopefully...

In my search for an mppt I've come across 2 open source mppt's that I like,(unfortunately they can only handle <1000w, a bit small unless I use a lot of copper, but I prefer open source, being a Linux user, I find it superior to corporate), the 1st is a self build, a bit out of my depth, but...

Hi, Panels are TW 415W 1085 x 1722mm (as big as a door), on a 15 degree steel roof. Area has v. high gusty wind. Manual instructs & typically mounted with 4 clamps per pv, no mention of wind zones. I'm planing on securing as recommended the 4 clamps to short rails(250mm, ~10'') with 2 roof...

7.5kw pv's , still researching mppt's. To avoid details, I want to install a very small lithium batt's probably 48v. https://dotwatts.com/solar-battery-charge-time-calculator/ says I need 300Ah batt, taking 2hr's to charge for batt health. but I want <100Ah, its mostly for a cool air con...

Hi, So I'm replacing a small old off grid with a new 7.5kw off grid, & being poor seek best value for my mppt, after long searches I find this ~$25 US each, sold on many online retail, Its sold as a mppt but I'm not sure what it is, What is a combined mppt/pwm? I know what they are, but not what...