Re: [RE-wrenches] Tigo RSS Off Grid

Hi Jeremy... The Classic AUX outputs will put out about 13 volts and allow up to about 200 mA maximum. That might be enough to power the transmitter. That is only about 2.5 watts so might not work directly. boB Docked at Trinidad/Tobago today.  Great sun here.  Have only seen one PV

Re: [RE-wrenches] Mate 3s with legacy FX inverters

Darren Emmons who designed the Mate 3S says that when he left OB, it  DID work with those older products. So, unless they changed something, it should still work with legacy inverters etc. boB ___ List sponsored by Redwood Alliance Pay

Re: [RE-wrenches] Power conditioner for Trace inverter

William,  you are correct that it is a little harder on the capacitor due to ripple current caused by the little jumps in waveform.  This is where the series inductance will help the filtering a bit too. The added L  will add that bit of needed impedance to complete the L-C  filter. The SW

Re: [RE-wrenches] Power conditioner for Trace inverter

Hey Wally !   This is definitely truth when adding loads improving the waveform of the SW. My friend could make his 2 SW's charge his Chevy Bolt by turning his oven on in the kitchen. The stray inductance along with the higher load current I think is what is doing this. Time =  L/R  in

Re: [RE-wrenches] Power conditioner for Trace inverter

Chris, I just helped a friend with his  EV (Bolt) not charging from two stacked SW5548's... The problem is usually those darned sharp edges created by the 3 modified square-wave inverters in series. I guess technology is going backwards for this kind of stuff ?  New electronics designers I

Re: [RE-wrenches] High current dc combiner vibration

We are talking to Kirk offline about this but the main issue here is that the enclosure for the 2000A combiner is made out of steel which is ferrous.  That means that when the 120 Hz ripple current induces into the chassis it can vibrate just like a transformer. Low frequency transformer

Re: [RE-wrenches] High current dc combiner vibration

The battery cables being close together, twisted too if possible, help reduce cable inductance which can cause voltage drop across those cables at higher currents with 120 Hz ripple. Mainly with low frequency transformer inverter/chargers. It's better to have them closer together than far

Re: [RE-wrenches] Off-Grid AFCI Update...

Hi Kienan /"There's an interesting //Sandia report // where there were testing an AFCI combiner that MidNite made, // //but it doesn't seem to be available anywhere...

Re: [RE-wrenches] Fire fighters

Well, turns out there might actually be something to bright scene lighting enabling some power output during a fire at night. Here is one paper from San Francisco. http://ufsw.org/pdfs/photovoltaic_systems.pdf However, firefighters have particular safeguards they should follow day or

Re: [RE-wrenches] Fire fighters

I believe that kind of  illumination  could certainly put out some voltage but wouldn't have much, if any, current or power behind it.  But could shock someone. Any dangerous energy would have to come from a capacitor being charged up that SHOULD be disconnected through the rapid shutdown

Re: [RE-wrenches] Remote battery disconnects

 SPDs or (MOVs) on the PV input side of a charge controller are not wired to snub excessive PV voltage. They are wired from PV+ to GND and the other from PV- to GND and only the two in series, at double the MOV clamp voltage would have any effect on clamping the PV+/PV- voltage. SPDs are

Re: [RE-wrenches] Low Frequency transformer off-grid inverter options

Three (3) weeks is also what I am being told.   Part of the delay was that ETL/Intertek dropped the ball, big time. Actually, ETL ran out of brains and we had to go to another NRTL altogether for inverters. And yes, it does surge very well. Merry new year, all ! boB On 1/14/2023 11:40

Re: [RE-wrenches] Battery disconnect solution

I understand that MidNite is working on a new product to replace the BDM. Makes sense actually.   I don't know any more than that though. Robin Gudgel would know more. boB  boB Gudgel  On 5/9/2022 5:43 PM, Jeremy Rodriguez via RE-wrenches wrote: Does anyone have a solution for operating