Recent content by jnrhome

I did this for a customer. 30kW battery, 8kW Growatt inverter. Cost $10k installed. It provides in excess of 24 hours full backup power for her whole house. Grid and generator fed.

I use this: https://www.amazon.com/Adjustable-Converter-Switching-Regulated-4-Digital/dp/B08JPKQD41 They also make a 24a which I also have. I use them both, set to 51.4v and plugged in to the grid to keep my banks from going to low on my off grid system. They have been excellent performers.

What if you connected your grid to the generator in rather than the grid in? Wouldn’t that prevent all back feed?

I just completed a virtually identical situation. I had a growatt 12kW with 8kW panels (18-445w Canadian Solar 3S6P) and 60kW (4-15kW lifepo4, 304AHx16 cells, JKBMS) battery storage. I replaced the single Growatt with a pair of Megarevo R10KLNA units in parallel and revised the panel/string...

The unit came with a usb to serial connector, but who still has serial ports...? both books show rs485 and canbus capabilities. I shouldn't need a shinephone wifi module to see the unit, but ordered one anyway.

I've added a SC48120-MPV stand alone solar charge controller to my existing SPF 12000T DVM MPV Growatt 12K Inverter so i can add even more panels. Charging works fine but I'm trying to figure out how to get the new SCC to speak/report with/to the main inverter. Seems like I require an RS485...

My 8000T begins beeping twice per second when the battery falls below the 49v setting. Once it rises above 49v, the beeping doesn't stop. How do I reset that so it stops beeping? I've power cycled the PV, inverter and cut all battery power once it rises above 49v, but the beeping persists.

i upgraded from 24v lead acid to 48v lifepo4. I couldn't just dump the lead acids and had two small 24v inverters so i got a 15a 48v to 24v buck converter and set my system up to charge the 24v lead acid bank from the 48v lifepo4 bank, then ran my 24v inverters from that. Super cool as the 48v...

AWESOME! It has exceed all expectations. The system was built to provide internet connectivity to public school students in low income neighborhoods so they could do their homework online without a home internet connection needed. It is shuffled from neighborhood to neighborhood, community...

Has anyone seen one of these? Very interested in first hand impressions https://www.epsolarpv.com/upload/file/2104/EPEVER-Datasheet-UPower-Hi.pdf

It is a great unit. Pricey, but worth it for my application. Self-contained, self-sufficient mobile wireless broadcast system. This is the prototype unit.

Not really bad, but enough to reduce capacity. Certainly enough to warrant automation. Maybe 500-1000mv

System already exists, but without a bms. I’ve been manually balancing quarterly but would like an automated option. I use a TP-Din Sc48-20 from tycon systems. https://www.tyconsystems.com/tpdin-sc48-20v2+

I have need for a small 48V BMS to balance a 25Ah, 48V 7P, 14S 18650 pack with a 110w solar charge and a 20w constant load. Max amperage is <3A so a 5A BMS would be plenty. Does anyone know of a 48V, 5A BMS or 14S, 4.2V active balancer that would keep my pack happy without overspending or...

usb cable and software needed to access all user settings.