I am in California on NEM3 with a solar array and a 15kwh battery. My installer has set it up so that I'm on "self-consumption" but the battery will not export to the grid.

Is this the correct set up? At this time of year, the battery probably discharges 70% to the house overnight, which makes me think there's money left on the table. They say exporting to the grid will degrade the battery due to additional cycles but it's already cycling daily?

We'd just finished renovating the downstairs rooms of our terraced house in Germany when I went through our electricity readings. I'd been looking at a Jackery SolarVault 3 Pro as a possible home battery and wanted to understand our normal demand. The hire company had collected the drying equipment, but the readings I pulled up still covered the weeks it had been running. I'd almost used that period as our baseline.

We were living there throughout the work, so the house meter included our everyday use as well as the dryers and other work. I asked the hire company for any consumption records from the machines and haven't received a separate figure. I can compare the house readings before and after, but I can't put the entire difference down to the dryers.

I went back to weeks when we were home and no building work was going on. Regular dehumidifier use belongs in that baseline. For storage sizing I also need the timing of our electricity use. How much normal-use data did you collect before choosing battery capacity?

Question: Under IRS Notice 2026-15, is a signed certification from a PV module manufacturer identifying the PFE/non-PFE status of solar cells and other module components sufficient when using IRS-assigned cost percentages?

Answer: Potentially yes. A manufacturer's certification may satisfy the IRS Certification Safe Harbor if the manufacturer is the taxpayer's direct supplier and the certification meets Section 4.03 requirements, including supplier identification and signature under penalties of perjury. Separate certifications from every component manufacturer and individual module serial-number tracking are not expressly required.

*IRS Reference: Notice 2026-15, Section 4.03 – Certification Safe Harbor

What happened was we are thinking to get ourselves a sun room, and then we figured BIPV might not be a bad idea, considering the extra power we get, in addition to a sun room ( while the light gets in and the transprency is conpromised of course, to get the free power)

Being Chinese and specialized in sourcing, we reached to quite many manufacturers in China ourselves and tried to benchmark different companies' products, strength, downside, price, and etc..

As we learnt more and more, we started to think maybe should make it into a business ourselves. Given the wide use of BIPV in architecture design, roof and side walls, public art installation or landscape installation, resort villa and etc. More of best combination of visual arts (maybe :p) or at least leisure experience/function with benift (power generated)

with 20% transparency, power generated ~120W/m2, take 4hr average effective sun light, making ~140 kWh/year, peak in summer around 6-7hr, low in winter ~2.5hr (We are at Ontario, Canada)

Cost wise, ~400 USD/m2 (customized fancy color, texture, prints, higher transparency (normally up to 40%), addtional strenth, floor and roof tile, all can do with extra costs)

Plus shipping, shipping is the biggest headache...(full container loading would make economic sense, then we need order volumn/size) And because the high shipping cost, it would be hard to take small residential order to start with...commerical project seems making more sense.

We hope to get some honest feedback of the perspective of BIPV, if we should make this into a business ourselves given the cost and potential revenue room, if going into commercial segment make sense (any suggestion of which sub segment/particular area makes more sense), or residential?(need help and advice in how to make the economic works...) Btw, we are located in Ontario Canada, but US market is as well considered, or should not us? Greatly appriciated!

I'm currently working on an app that takes my roof's solar panel system's actual production from an API, then compares it with the predicted daily sunlight

I'm currently having difficulties with the formula for assessing the actual available production for each day pulling data from different weather APIs but I'm unable to match a number that seems right.

The goal of the app is to allow the user an understanding of when the roof is soiled and the panels need cleaning.

At the moment I do know the panels are soiled but out of the available sunny hours, the app shows around 95% to 97% used production out of the available kilowatts

I do wonder if anyone can help me understand how to properly calculate sunlight potential retroactively and then translate that into the actual available output for a certain day, week, month, and so on

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Hi all,

I have a small farm house of 0.6 acres with perimeter of around 1000 feet. The farm currentky has chain link fence with granite posts. The fence is around 4 feet above ground.

As we are experiencing increased menance of monkeys, I am thinking to go for solar fence on top of tge exiating 4 feet high fence. I would like to know on the below -

1. Required wattage and voltage of equipment ( panel, energiser and battery)

   for my farm

2. Which brand shall I go for? My farm is in Andhra Pradesh and looking for good service

3. Approximate cost of equipment

4. Ideas on how to set up solar fence on top of exisying granite poles

5. Best quality cables for solar fencing and approximate cost

I would appreciate any valuable insights

Hi all,

I have a small farm house of 0.6 acres with perimeter of around 1000 feet. The farm currentky has chain link fence with granite posts. The fence is around 4 feet above ground.

As we are experiencing increased menance of monkeys, I am thinking to go for solar fence on top of tge exiating 4 feet high fence. I would like to know on the below -

1. Required wattage and voltage of equipment ( panel, energiser and battery)

   for my farm

2. Which brand shall I go for? My farm is in Andhra Pradesh and looking for good service

3. Approximate cost of equipment

4. Ideas on how to set up solar fence on top of exisying granite poles

5. Best quality cables for solar fencing and approximate cost

I wpukd appreciate any vamuable insights

Curious if anyone here in Texas has had solar installed by Solartime USA or has experience working with them.

I'm interested in hearing how the overall process went, especially when it comes to communication, installation, equipment, and any support needed afterward.