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Just finished installing a FlexBOSS21. It has been updated to FAAB2021 version (latest available). I've notice a bug in the fan control logic that lets the unit overheat under certain conditions, sometimes quite severely, particularly when charging the batteries. On grid, no battery charging...

I need to buy a second EG4 Indoor Wallmount battery. My first was from Signature Solar which went well, but they had stopped offering free shipping so I looked around at others. Solar Sovereign was offering free shipping and a free EcoFlow RIVER 2 Pro portable power station. That good a deal...

Yotta Energy for putting battery storage under the panels on the roof. There is no worse place you could possible put the battery than the extreme temperatures and exposure of the roof. The heat will chemically aged the cells quickly, the cold will reduce their capacity, and the thermal...

My company building is 35,000 SF single story located in Newburgh, IN as shown here: After looking into residential solar for my parents in Florida, I've started to think what I can do to my building, so I am perhaps going slightly mad thinking about solar. The building is 3 phase 208 VAC...

Here is an intelligence test: Say you have $10K of stuff to buy. You can buy it all at once for 3% discount. Or you can buy it in two orders for a 4% discount. Or you can buy it in 5 orders for a 5% discount. Of course, it needs to break into pieces that fit the dollar amounts, but you...

Our permit was rejected in Sarasota County, FL because we are derating a breaker from 200 amps to 175 amps. The AHJ says: This has nothing to do with the solar system, it just seems to be finding a trivial change and then escalating it to require a 1995 house electrical system to now meet...

I am considering purchasing up to 3 FlexBOSS 21 units for use in 2 sites and have these questions after reviewing the spec sheet and manual. I thought it would be good to do this on the forum so others with the same questions can be helped at the same time. I hope EG4 responds officially to...

For a system with one EG4 18KPV inverter, grid tied, 11 KW solar array, batteries primarily for backup, which would you pick for batteries: A. Two EG4 PowerPro 14.3 KWH batteries, total 28.6 KWH for $7600. B. Six Ruixu 5.12 KWH batteries with rack, total 30.7 KWH for $8300 (on sale for 10% off...

I see the RE+ solar trade show will be in Anaheim, CA Sept 10-12. Is it worth going? Is it free to attend just the expo hall? That's typical of the trade shows I visit, but I didn't see that option on the RE+ web page. Mike C.

Does anybody know what the FlexBOSS21 algorithm is for charging a battery when controlled by volts and not SoC? My setup is one FB21 and two indoor 280 AH wall mount batteries. The batteries are used solely for standby when the grid goes down (since I have full net metering). The batteries...

Anybody using the Sungold SG10KHB-48 hybrid inverter? https://sungoldpower.com/collections/hybrid-solar-inverter/products/10kw-hybrid-inverter-48v-split-phase 15 KW PV, 4 MPPT, 10 KW AC, 48 volt battery input. Looks decent on specs and at $2400, might be worth considering since that is less...

In preparation for monitoring my parent's house, I bought an Emporia energy monitor kit with two main CTs and 16 branch CTs. It appears to be a nice little kit and seems to work electrically. What I thought I bought was the ability to get second by second usage data over a long period of time...

For my parents house, there is a main and a backup panel. I'd like to have a double throw manual transfer switch to change the backup panel from being powered by the inverter load connection to the grid directly in case of inverter failure or service. Max load would be 80 amps, 2 pole (split...

I just got an FB21 installed. It runs in Backup mode where I want the batteries to only be used if grid is down and PV is inadequate. At night, with no PV input, but with grid, it draws about 1.5 amps from the battery. This is not reported anywhere on the EG4 monitor app, it was measured with...

Traditional UPS units using lead acid batteries are a plague since their batteries age out every 3 years. This creates huge waste and cost especially if you have a fair number of them. But you can't find hardly any UPS units that use LFP batteries which would be a great improvement. Instead...

I need to decide on rails for my 12 KW install on a W style concrete tile roof. Nominated candidate is the Ironridge XR-100 rail on 6 ft spacing using All Tile hook mounts. Ironridge also sells another kind of rail, the Aire A2 which would also work on 6 ft centers with the same tile...

For various reasons (details later), I am removing an Amensolar N3H-10K-US inverter from my setup and I am looking for a replacement inverter to take over. What can I buy and what results are people getting for it? Requirements: - USA split phase 240/120 VAC with the regulatory certs for grid...

I'm considering installing a fairly large array on the roof of my building, potentially up to 192 KW of panels. The building has 800 amp 208 VAC 3 phase power. The most economical inverter system I can find is this one...

Dumb question time: What is the difference between a hybrid inverter and an all in one inverter? I thought they were one and the same, that is, inverters that can use solar and batteries to run with the grid off, and can run grid tied when it is present. I noticed this forum changed names...

What can one do to prevent someone randomly punching your rapid shutdown button on the side of the house and causing your backup panel to go dark? Can I put the RSD button inside a NEMA 3 enclosure so it looks like a "normal" electrical thing and then have a security tag like the meters do...

I'm shopping for panels (450W class, know any deals?) and was putting a lot of weight on the power performance warranty percentage and duration. Some are as bad as 20 years and 80%, some are as good as 30 years and above 90%. But then I wondered, how would you know? Or more to the point...

I’m new to designing solar power systems, so I am hopeful to draw on the combined experience and wisdom of the group to review my proposed system design. My parents live in Sarasota, FL about 4 miles inland and are looking into installing grid attached solar and battery on their house. Most of...

Anybody used this irradiance meter? https://www.amazon.com/gp/product/B0CFXLSMHB $59, talks to your phone over BT for readout, runs on two AAA batteries. The reviews on Amazon are clearly fake (English, German, Spanish, Italian entries are basically the same text). One could use this to...

For a grid tied EG4/Luxpower 18KPV, what happens if it has no battery attached? There was some comment that the unit would not work properly in these circumstances, that is required a battery to be stable or operational. If so, this seems like a weakness since loss of the battery (for service...

Hello, doing a paper exercise to figure out what the compatibility is between EG4 18KPV and Tigo MLPE modules. See if I got this right: A. Rapid shutdown only 18KPV (of recent production) has the SunSpec RSS signal built in that will trigger with RSD button (either side of unit or external)...

I've recently put into operation an array of 30 Canadian Solar CS6R-395MS-HL panels with Tigo TS4-A-O optimizers connected to an Amensolar N3H-X10-US (aka NHX-10K). At peak power today, the Tigo was reporting 10385 watts of PV output: About 87% of panel nameplate rating. The inverter was...

Looking for a licensed contractor to help with a residential project in Sarasota, FL. The local AHJ won't allow a homeowner to install on their own, so I am stuck and need help. System is 11.7 KW using 30 CanadianSolar CS6R-390MS-HL, 3 string of 10 each. Tigo TS4-A-F RSD boxes. Amnesolar...

Given a residential roof array in Florida with Tigo TS4-A-S rapid shutdown devices, does that satisfy NEC 690.13? That is, I don't need an isolator on the exterior wall of the building for fire fighter operation, just an RSD button which shuts down the inverter and the panels. That being said...