Recent content by apctjb

Would like to add whole house battery backup to my existing system. I have 5KW on my house with an SMA grid tie inverter, and 6KW on my barn with a Growatt grid tie inverter. I plan on adding an additional 10KW of PV on my garage with hybrid inverter & battery to supply backup power during...

ksmithaz1 & Tim; Thanks for the explanation. This has been an educational thread. I certainly see the perspective when the power source originates from one generator/winding. Somewhat less initiative if there are two power sources as in the case of paralleled inverters. Speaking of which can...

2 oscilloscopes 2 waveforms, 180 degrees out of sync on the time scale. One phase, 2 waveforms, really?

Totally agree. Here is thought experiment; take 2 oscilloscopes and connect one L1 to N and the other L2 to N. Would each display a sinusoidal wave form? (Yes) And if you were to super impose one wave from on top of the other would you see just one wave form (No) or you would observe two...

Thanks, that is what I thought but not 100% sure.

No doubt, its flawed on most things these days. That said this is my understanding...

Had not heard of this brand but took a look and you are correct. Does EG4 make there own stuff or are they private labeling/repacking the electronics?

Not sure if there is, but certainly not hard to do. Take 2-3K inverters, like my Growatts, configure for 120/240 (out of phase 180 to neutral) and put them in one enclosure and in essence you have a 2 phase inverter. I suspect the 6000XP does the same unless it has a auto transformer, but then...

I know you this stuff better than most so perhaps semantics, but the 120/240 volt system in the US, often referred to as split phase power, involves two 120 V AC lines that are out of phase by 180 degrees with each other relative to the neutral line. This configuration allows for both 120 V and...

Open to suggestions. Can you elaborate why the 6000 XP is superior and how does it provide 120/240 in a single unit. (Autotransformer or 2 internal inverters). Can it run only 120V or must be 120/240.?

Not intuitive why 240 appliances would be more efficient other than than IR loss, I just don't have big power draw loads. My mini splits are all 120 and they are the biggest load. I have split phase panels but have them jumper so both legs are on one phase. That way I don't have to balance...

Growatt 3000's in parallel; they have worked great but buggy MPPT wakeup and monitoring via Solar Assistant.

Considering swapping my existing inverters for a pair of EG-4 6500EX inverters. I don't have an 240VAC loads so wired my system for 120V. My understanding is the EG-4 6500EX is 120/240 with a single inverter (curious to hear how they do that, auto transformer or 2 internal inverters set 180...

I have a Daly BMS 16S on three of my battery banks. All connected (via UART) with Solar Assistant. I recently top balanced some of the cells in my bank, before top balancing any of the cells I disconnected battery from main bus bar and removed the voltage sense ribbon cable from BMS. I did not...

Finally had time to do a more throughout inspection. Found that one of the IGBT's on the main board had blown. These are rated 600V, 80A. Unlikely a voltage problem so suspect either a current issue or simply random component failure. The inverter was not connected to any loads at time of...