efficientPV

How about a better shot of that battery pack. Remove the tape and measure the voltage of each cell. Any below or near 1.2V is lost...

This was a failed venture years ago to get a friend's son into a little money making venture. I figured he could sell two a month on...

Is the battery that far gone that it won't work for short time use. I would think you could jumper out a couple bad cells and still...

Why would you ever need more....

The transformer won't limit current as you think. It will keep feeding current till a fuse blows. I don't think you need more than a...

These do solve a need for those only comfortable with a screwdriver. I do think it is a odd choice to use an IGBT for under 200V...

If the DC voltage you supply is slightly less than the power point of the array. the two sources will blend power. I do blending of...

I'd like to think everyone has at least a cheap voltmeter. Measure the AC volts to a grounded electrical outlet. Even without that an...

I'd like to use this video to illustrate the issues with matching a PV array to a heating element. This off grid system tries a number...

Just put a couple of diodes in series with what you want to power. Diode bridge blocks would be easy to mount. Just connect battery...

IGBT Based Solid State 40A DC Relay Not an individual IGBT. And yes, these all have very weak drivers. Takes a lot of photons to...

I can't think of anything I would use this for and paying more won't likely get better results. It would be nice if there was a brick...

A lot of wild speculation here and perfect fodder for a forum. This wouldn't take 10 minutes to solve with some instrumentation...

I have wanted to test one for a while to see how fast they are. Listing said 10ms to turn on and off. This is not an anti bounce delay...

I'd say this is more common than people think. Ground is tied to neutral but neutral is not always at "ground" potential. There can be...

Which cap is that?

I think you made my point, you already spent a lot of money. This discussion is not applicable to you. Everyone sees things as how they...

I had some real nice PABST muffin fans from Germany. Trouble was they were 220V and I wanted to use them on 120V. I used a little...

This graph compares the voltage on the array compared to what is sent to the heating element. Off times the capacitor bank charges. On...

I promote good design in heating water. I'm not limited t promoting any one circuit. Looking at PV array voltage is a good way to...