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Richard Strömberg

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RE: Sharp ND-N2ECU and ND 72 EL(R)UDF Panels

Posted By Richard Strömberg 04-21-2024 01:05 PM
Found In Egroup: Everything Solar Forum \ view thread
Hi Mark, How did you resolve this issue? I recently came across some of these 72 and 142 watt Sharp modules in a donation to our nonprofit. My guess is that Sharp designed these to be wired in series and so long as the watts per string were less than 600V and each string was the same total watts, your ...

RE: Reminder: PV Technical Division Quarterly Webinar is tomorrow Wed 20-Mar 6pmEDT/4pmMDT

Posted By Richard Strömberg 03-19-2024 02:38 PM
Found In Egroup: Everything Solar Forum \ view thread
Please note that you will need to have a personal or business Zoom account and log in to that account before joinging the webinar. ------------------------------ Rich Stromberg ESS Prog Dir / PhD Student Equitable Solar Solutions / Univ of Alaska Fairbanks Colorado ------------------------------

Reminder: PV Technical Division Quarterly Webinar is tomorrow Wed 20-Mar 6pmEDT/4pmMDT

Posted By Richard Strömberg 03-19-2024 01:02 PM
Found In Egroup: Everything Solar Forum \ view thread
Greetings ASES Members, The PV Technical Division would like to invite you all to our next quarterly webinar. (Please note that you will need to have a personal or business Zoom account and log in to that account before joinging the webinar.) You won't want to miss our guest speaker next Wednesday ...

American Solar Energy Society PV Technical Division - Q12024 Webinar Wednesday March 20

Posted By Richard Strömberg 03-14-2024 02:10 PM
Found In Egroup: Everything Solar Forum \ view thread
Greetings ASES Members, The PV Technical Division would like to invite you all to our next quarterly webinar. You won't want to miss our guest speaker next Wednesday afternoon. Claire Kearns-McCoy from Clean Energy Associates will share results from their recent study "Solar PV Module Quality Risks". ...

RE: Distributed PV provided by utility companies to avoid private installer reliability issues

Posted By Richard Strömberg 02-14-2024 04:51 PM
Found In Egroup: Everything Solar Forum \ view thread
I suspect the companies are reticent to commit to supporting the O&M of a system that they did not personally install. This would be especially true to utilities for whom residential solar installation is not a part of their core business model or competencies. -Rich ------------------------------ ...

RE: Solar ground mount solutions

Posted By Richard Strömberg 02-13-2024 08:05 AM
Found In Egroup: Ask a Renewable Energy Expert \ view thread
Hi Bill, I like the PowerField solution as you can use local fill for the ballast and it keeps the modules tilted so they better shed water/snow (although in heavy snows your modules will still be covered). I would strongly advise against any ground-mount system that places the modules horizontal ...

RE: Join the Technical Divisions Leadership Team!

Posted By Richard Strömberg 08-18-2023 09:45 AM
Found In Egroup: Ask a Renewable Energy Expert \ view thread
Solar Thermal Chair - talk about being in the hot seat! ------------------------------ Rich Stromberg ESS Prog Dir / PhD Student Equitable Solar Solutions / Univ of Alaska Fairbanks Colorado ------------------------------

The Photovoltaic Technical Division is seeking your feedback - short survey

Posted By Richard Strömberg 08-18-2023 09:05 AM
Found In Egroup: Everything Solar Forum \ view thread
Greetings to current and prospective members of the PV Technical Division! The PV technical division is working to conduct periodic meetings/webinars and is seeking you inputs to understand your background and interests so that we can structure these online events to best serve you. Many thanks to ...

RE: Question about the Efficiency of Solar Panels

Posted By Richard Strömberg 07-25-2023 09:49 AM
Found In Egroup: Ask a Renewable Energy Expert \ view thread
It mostly depends on the microinverters used and how much they clip power. It is common to pair up a 230-watt module with a 190-watt microinverter (Enphase IQ6 or 7). If this person is only getting 28kW output for 40kW of installed capacity, there will be a bit of ungenerated power due to the sun angle ...

RE: Researchers assess degradation in PV systems older than 15 years

Posted By Richard Strömberg 07-10-2023 09:56 AM
Found In Egroup: Everything Solar Forum \ view thread
We should temper our use of these numbers for PV module degradation, both in general and even for this particular system. Their method of using HOMER to quantify the annual output degradation will mask true module degradation. HOMER wasn't actually design to do that (note that as the former Alaska ...

RE: Media Query - Energy Grid Reliability / Senate Hearing

Posted By Richard Strömberg 06-13-2023 09:26 AM
Found In Egroup: Ask a Renewable Energy Expert \ view thread
The best folks to respond to this are the good folks at ESIG (energy systems integration group). Speak with Charlie Smith or Debra Lew. Home - ESIG ESIG works with the ISO/RTOs, large RE developers, large utilities and RE equipment manufacturers to figure out how to get high contributions of renewables ...

RE: Are fossil fuels required if an off-grid home has resistive loads?

Posted By Richard Strömberg 05-15-2023 09:15 AM
Found In Egroup: Ask a Renewable Energy Expert \ view thread
You would want to place a load controller between the batteries and DC electric heater. You could also run 120-volt AC electric heaters through an AC-DC inverter. Sent from my iPhone

RE: Blank screens on SMA Sunny Boy 10000TL-US inverters

Posted By Richard Strömberg 05-09-2023 06:49 PM
Found In Egroup: Ask a Renewable Energy Expert \ view thread
Thanks William. That is in line with my past experience when I have inspected systems with SMA inverters. ------------------------------ Rich Stromberg ESS Program Director Equitable Solar Solutions/Coldharbour Inst. ------------------------------

Blank screens on SMA Sunny Boy 10000TL-US inverters

Posted By Richard Strömberg 05-09-2023 08:57 AM
Found In Egroup: Ask a Renewable Energy Expert \ view thread
Greetings Sunny Boy users! I was inspecting a solar array for a school yesterday. They wanted me to investigate a discrepancy between energy produced and energy billed under their PPA with the system owner. All 9 of the Sunny Boy 10000TL-US inverters had functioning LEDs but none of the displays worked. ...

RE: How Do I Know My System is Still Making Power?

Posted By Richard Strömberg 03-15-2023 08:58 AM
Found In Egroup: Everything Solar Forum \ view thread
I was inspecting a friend's rooftop array in Albuquerque last fall. He also didn't know who the installer was or the module type. Fortunately, PNM (or the state electrical inspector) requires that a weather-proof tube be mounted next to the production meter on the outside of the house containing the ...

RE: How Do I Know My System is Still Making Power?

Posted By Richard Strömberg 03-15-2023 08:52 AM
Found In Egroup: Everything Solar Forum \ view thread
I've lived off-grid since 2006. For off-grid folks, we have the advantage of knowing fairly quickly if something fails. Fortunately, my system has been quite robust. ------------------------------ Rich Stromberg ESS Program Director Equitable Solar Solutions/Coldharbour Inst. --------------------- ...

RE: How Do I Know My System is Still Making Power?

Posted By Richard Strömberg 03-14-2023 07:14 PM
Found In Egroup: Everything Solar Forum \ view thread
I can't speak for other states but in Colorado, the utilities I have worked with require that they (the utility) installs a producton meter. An electrician or solar installer can set the meter recepticle but only the utilty can install the actual production meter. Maybe just using a single photo of ...

RE: How Do I Know My System is Still Making Power?

Posted By Richard Strömberg 01-31-2023 11:08 AM
Found In Egroup: Everything Solar Forum \ view thread
Maybe you could move the Gen Vue 1 over to the solar circuits for a few days (full sunny day would allow you to compare against PVWatts hourly estimates for the same sunny day) to do a system evaluation and then move your monitor back to the original location. ------------------------------ Rich Stromberg ...

RE: How Do I Know My System is Still Making Power?

Posted By Richard Strömberg 01-31-2023 10:16 AM
Found In Egroup: Everything Solar Forum \ view thread
Hi Mike. The challenge with this particular Emporia device is that it is communicating with the utility meter and at that measuring point, the only thing you can discern is the amount of power being pulled from the grid or the amount of surplus solar being pushed to the grid. An exception would be if ...

RE: How Do I Know My System is Still Making Power?

Posted By Richard Strömberg 01-10-2023 11:47 AM
Found In Egroup: Everything Solar Forum \ view thread
Hi Wyldon, I think apps associated with inverters and microinverters are great for getting curious system owners to monitor their own systems. These are very powerful. For those with older systems who would like to monitor their array output live, we have installed some low-cost Emporia Vue monitors ...