Recent content by daklein

Emporia had been less expensive for me. It was only $400, but since it's UL and EnergyStar rated, my utility has a $500 rebate. I agree, reverse engineered control of the Emporia, still relying on their cloud that they could always decide to block, is brittle. To do the excess solar with...

Maybe an old thread, but good discussion. How did those CT clamp power switches work out? Could be useful for some cases. You mentioned Emporia, hoping to get them to offer a configurable excess solar or power measurement switch, not so likely I think... If you have any home automation...

The emporia EVSE has an open-source way to control it, still through the cloud, but can be done with local control. Need to have something to decide the desired charging current, and use the PyEmVue python library to send the command to the cloud, which then sets the EVSE current and on/off...

The emporia EVSE has an open source way to control it, still through the cloud, but can be done with local control. Need to have something to decide the desired charging current, and use the pyemvue python library to send the command to the cloud, which then sets the EVSE current and on/off...

I considered the open-evse, or making something even more DIY to create the SAE J1772 PWM signal. But the Emporia EVSE was less expensive, and while still requiring use of the cloud, there's an open source PyEmVue python library that can control the charger. For a standard sort of electrical...

I don't have any SMA PV inverters. The relay is 3PST. If it's running with some significant load through the relay, an IR camera on each of the internal wires of the relay might show if it's using 2 or 3 of the contacts. My cheapo IR toy is not good enough resolution to see. Maybe I'll...

I just had the transfer relay stick closed on the master inverter, with the 605 error. The inverters were passing through grid power and the grid must have gone away and come back. The slave turned off, displaying waiting for master and ready to start up. While the master remained on and...

Which inverters are you thinking to use?

There we go, now the SOC is correct! fun to watch. One of these days I'll look at this data and see how many Ahrs & kwhrs went in and out here. By eye, if taking out all the SOC resets shown, the real lowest SOC might have been around 70? So the original SOC estimate may be reasonable in...

222.11 set to 4 mV/dC I'm not sure what a typical value should be, but that seems to be near the general google range? I think this is what mine was set to initially from the DC Solar trailer. My forklift batteries are GNB Tubular LMX. I might try to make some plots sometime, I do...

Great idea! Increase that a little bit and see what happens to SOC resets.

This does look a little similar to what mine did today. It must be the solstice. https://diysolarforum.com/threads/sma-sunnyisland-6048-lead-acid-soc-estimation.75332/#post-956816 I'm not sure I'm following the plots and description perfectly, but, I don't think the Midnite SOC estimation...

It does look similar to @Trukinbear, in that it happened at about 46v while SMA SOC was relatively high, 75% for me, about 70% for Trukinbear My voltage was about 45.7v, and not so light load of 85A, when it reset SOC. And that's after moderately discharging for about 8 hours. FLA battery...

Wow, that was a big drop in the SOC estimation, from about 75 down to 20. Dropped into the battery protection mode and connected to the grid even though it was still on-peak hours. I just happened to notice looking at the monitoring. If the grid had not been available, it would have shut off...

If you already have a battery inverter, and want to dump power into a different battery, controllably, maybe this project, with some code modification. https://diysolarforum.com/threads/amazing-diy-mppt-scc.50939/