I have an off grid prewired system MNEMS4448PAECL250 that I absolutely love.
My solar panels are ground mounted and have a local combiner/disconnect.
What I would like to do is set up an emergency system shutdown that would open the following breakers:
Main Battery Shutoff - currently MNEDC175 Breaker - I think PV Input breaker currently - MNEDC60-300 PV - I think PV output breaker currently - MNEDC70 - I think AC input breaker currently a 30A 2 pole not certain of the part number.
All of this is based on the diagram from Midnite Solar I am currently not at the box so cannot verify for now.
I would like to be able to do this so as to provide a single point of shutdown in case of emergency (thinking a fire or something as catastrophic). This is not necessarily used to save the equipment but to disconnect all potential loads that might be headed into the house.
My system has been inspected and approved by the local electrical inspector, but he suggests I investigate the feasibility of a single point of shutdown. And I like to idea as well.
I was thinking that if I could swap the above breakers out with some kind of remote trip breakers and a big red 48V emergency kill switch that would activate all of the RT breakers from my battery bank. Kinda like the old birdhouse just less finesse.
Any ideas or suggestions would be greatly appreciated.
Last post by Bmcgaha - February 07, 2023, 08:42:33 PM
I have a MN5048DIY inverter that is giving a positive voltage on the inverters neutral terminal, which is completely disconnected from any loads; it is just the batteries, PV panels, and the inverter. For some reason, I'm getting back feeding or something on my neutral side. Any help would greatly be appreciated. Thanks...
so it looks like I'll be getting a hawks bay 120 soon, and my 9 year old classic 150 will be standing in the unemployment line before too long. But I might have a job for it. I've been using my inverter as a ac charger on the occasions that i need it, but it's inefficiency (~58%), coupled with its noise (think 747 on the tarmac), and the fact that it acts as charger as priority over house loads, make this a less than ideal setup. In my older systems, i had always used discreet ac chargers and very much wish to go back to that setup. Now, Signature Solar has just come out with a 48v lithium specific dual voltage input, adjustable voltage AND current output charger which is good for a max output of 100a dc (while running 240v into it). This thing is $400. To my mind, that's extraordinarily cheap. Maybe too cheap to be trustworthy to not worry about my rather expensive kilovault habs getting damaged. I've talked to Signature in the past and they have always billed their ac chargers as "bms chargers", which are essentially constant voltage power supplies, meaning they absolutely rely upon the batteries bms to throttle the chargers down. I have spoken with kilovault tech support, and they have informed me that it's a bad idea to constantly rely on the bms to perform this task, as over time, it runs the risk of damaging the electronics. Therefore, I'm wondering how viable it is to simply run that charger through my classic 150. Any reasons why I wouldn't want to do this? Attached is the spec sheet for that 100a charger...Chargeverter-5kW-Spec-Sheet_1.0.1 (1).pdf
Last post by Wizbandit - February 05, 2023, 07:50:36 AM
I find the WiFi dongle next to worthless. When I found out how it works I was disappointed. There is no Inverter to Phone comms. Your phone is only used to setup the connection of the WiFi dongle to the Cloud server located in China. You then need an account with the Server where you access the uploaded data via the Internet. Your data (which also now belongs to the Chinese) can not be accessed if your phone and Inverter don't have Internet.