diy solar

diy solar

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  • Post in thread: What makes the tier 1 stuff “better”?

    Yes, a lot has gone to India. Schneider and OutBack Power, too. They do OK, mostly. I'm sure they use a lot of Chinese parts. We all have to. We are all dependent on China for a lot of parts but there are other problems with building products here in the US... Mainly, the 25% tariffs...
  • Post in thread: What makes the tier 1 stuff “better”?

    China is getting very good at building this stuff ! There are still some concepts that they just don't "get" yet. They may eventually pick up on all that. HandyBob... I remember him and the main issue that was happening back then. That was Classic's going into EQ seemingly on their own...
  • Post in thread: Midnite Solar Announced their new 10kw AIO at Intersolar Today

    Ballpark... $5,500. This should be compared more with the Sol-Ark 15K which is quite a bit more I believe. We are still pricing things out. boB
  • Post in thread: Midnite Solar Announced their new 10kw AIO at Intersolar Today

    Transformer and power transistors can limit the surge power due to their ESR. (Effective Series Resistance) Heat dissipation, which is related to the resistance of components, ESR, is more of how long the power can stay up there. That is strictly from thermal time constants. A low frequency...
  • Post in thread: Midnite Solar Announced their new 10kw AIO at Intersolar Today

    Five minutes wait time is ONLY for selling back to grid. That is part of UL1741 and IEEE 1547 standards that all grid tie inverters must abide by. It may be that the manual is not quite correct here in that if it is trying to say that the inverter won't power your loads until the 5 minute...
  • Post in thread: NEWS: New Midnite Solar DIY Series - SCC's & Inverters (great $ too)

    I was going to let this go but I need to mention something about manufacturing electronics in America. The US is not very electronic manufacturer friendly these days. Tariffs that are imposed on us and the cost of manufacturing in the US make it impossible to be as inexpensive as something...
  • Post in thread: Idle 'no load' Consumption: Specs vs Your Personal Observation

    Merry New Year ! The term "high frequency" can be confusing. 99.999% of sinewave power inverters these days switch at high frequency. HF Sinewave inverters that use the big heavy 50/60 Hz transformers are usually referred to as LF inverters. Inverters like Victron, Magnum, OutBack...
  • Post in thread: Sol-Ark/China

    Here is what I replied with on the MidNite forum.... You are correct in that everything except those couple of DIY units are all made in Arlington, WA USA However, parts come from all over. Raw PCBs come from China or Taiwan. Aluminum castings come from China and Thailand. FETs come from...
  • Post in thread: Has Richard from Signature Solar Left The Company?

    At Xantrex (Schneider), when someone was fired or was laid off, the president would say "he/she went to spend more time with their family" Always got a chuckle out of that till this day. boB
  • Post in thread: Back feed for snow melting?

    It can work but not guaranteed to work if too far below freezing and too much snow piled up on the array. It does take a lot of power and energy unless a light dusting. As for how much current, just do not exceed the series fuse rating of the panel, typically 15A or 20A. Here is an animated...
  • Post in thread: Midnite Solar Announced their new 10kw AIO at Intersolar Today

    I have checked HF and do get some birdies but we/I have not tried to improve it yet. Working on the B17 right now. I will say that the Rosie does not "wipe out" the HF bands like some equipment does. Rosie does have lots of common - mode filtering but I'm sure that mods will be coming to make...
  • Post in thread: Midnite Solar Announced their new 10kw AIO at Intersolar Today

    The first name WAS going to be Little Willie (my contribution).... Some didn't like that name. Gee... That was a song and it was an old tank name among other things of the past. Since we were also working on the B17, with a WW2 theme, and Rosie the Riveter was a WW2 name, a guy on our...
  • Post in thread: Is this a bad joke? Signature Solar creating specs requirements to avoid defective inverter costs?

    I would just like to re-iterate that this whole industry does not have enough technical people ! boB
  • Post in thread: NEWS: New Midnite Solar DIY Series - SCC's & Inverters (great $ too)

    Maybe we can open one of those up and take pictures ? I will see. boB
  • Post in thread: Midnite Solar Rosie on sale

    We don't give away our IP. China makes these inverters themselves now. We guide certain manufacturers is all. We still design and make our own products strictly in the US. With the help of parts that come from all over the world. Custom and off the shelf. boB
  • Post in thread: Will an SPD protect my charge controller?

    Hi guys. Sometimes there is a misconception about how regular lightning protection with SPDs (MOVs) work. An SPD does NOT protect the voltage across the PV+ and PV- lines (differential). This CAN be done but not with a lightning arrestor/SPD. Most electronic devices have what's known as a...
  • Post in thread: High End Audio powered by Solar vs Grid

    There can definitely be a difference in sound depending on if the 60 Hz line has sharp edges that might get into the audio signal. In my experience, the worst offender is a modified-square-wave inverter. These have sharp edges that you might hear through your system. In the early 1990s when I...
  • Post in thread: Midnite Solar Announced their new 10kw AIO at Intersolar Today

    Thank you Oz ! Yes, we were both there. We also have a few ppl that also worked there working at MidNite Solar. Trace actually came out of the Pacific Northwest audio manufacturing business and we worked with the Originators of Trace back in the early 1970s. What great times ! boB
  • Post in thread: Midnite Solar Rosie on sale

    We are working on this kind of stuff in more than one way. The ULTIMATE MN Solar AIO will be the B17, if we'd finish it. Had to take a little detour on that unit :) boB
  • Post in thread: NEWS: New Midnite Solar DIY Series - SCC's & Inverters (great $ too)

    Well, we didn't exactly START Trace... BUT Robin's and my relationship with companies, as well as Magnum Energy, OutBack Power, Heart Interface and some other PNW companies go back to the early 1970s when Bob Carver and Steve Johnston started Phase Linear making high power stereo amplifiers...
  • Post in thread: Midnite Solar?

    We are WAY slower than the bigger and off shore companies. Mostly because there is so little engineering and electronic manufacturing talent in the US. When they are found, we try to get them and a lot of them are very pricey. The ones that we do have are very appreciated Merry Christmas and...
  • Post in thread: Midnite Solar Announced their new 10kw AIO at Intersolar Today

    Remember that the 15K is actually 12KW except for during the day.
  • Post in thread: EG4 18k caused massive voltage spike

    That particular SPD will not help at all. They are 3 wires put into some sand, basically. Here is a comparison of a MOV based SPD lightning arrestor and a Delta. boB
  • Post in thread: spd means the dc core floats until a surge hits?

    Are you referring to this drawing ? (below, hopefully) The green SPD wire is GND and is connected to the GND bus bar. The DC negative is connected to the battery and PV negative but is not connected to GND at all in this drawing. The PV negative and PV positive are connected to the two...
  • Post in thread: Stacked Rosies

    wsaharem what a NICE job of wiring ! Especially without the E-panels. We try to always have decent support. We know that support is a big thing. boB
  • Post in thread: DIY MPPT SCC?

    Yes, here is a very quick history... I started at Trace in 1994 after working in pro and consumer audio and a few years in medical electronics.... Electronics part of those. Brother Robin started at Trace in 1990 after designing audio gear and then military flight power supply system stuff for...
  • Post in thread: Midnite Solar Rosie on sale

    For the B17-5 (5 modules), the first two (2) modules can be either inverter/charger or a 600V input charge controller module. Each inverter/charger module is at least 3kW (maybe 3.5kW ?) 120/240 VAC inverter and also charger. It is sort of a large Rosie in that the underlying power circuitry...
  • Post in thread: Reverse protection diode on PV input to MPPT

    A typical buck converter MPPT controller will automatically and intrinsically have reverse polarity protection due to the topology of a buck converter. The top FET has an internal diode with its cathode pointing to the PV+ input. And the bottom FET or diode will have its cathode pointing...
  • Post in thread: Midnite Solar Rosie on sale

    Remember also that the typical all in one PV connected to inverter DC HV rail does not normally give you full power output from battery. That must be done during the day with the addition of solar/PV input, such as the Sol-Ark and I think, most of the other AIO's. They also only usually allow...
  • Post in thread: Clipping

    Clipping = output current limiting OR Clipping = maxed out The term I'm pretty sure comes from the audio/hi-fi industry which means the amplifier is putting out all of the voltage it can supply. That's all it is. boB