Recent content by jgh

I wonder if the inverter would play ball if I set select.solax_solis_energy_storage_control_switch : Feed-in priority - No Grid Charging number.solax_solis_backflow_power : 100 by which I mean continuous 100W output to grid (assuming house loads do not exceed inverter max, and if there is PV...

Can't tell; I've been exporting, with only a few zero days. No need to import. I've pushed as much export as I dare into the 16:00 - 19:00 slot, which took a fair amount of devel cycles before I was happy with it. Seems to be running nicely now.

Surely for a series stack when one BMS cuts off it goes high-impedance (and does not provide a low impedance bypass path)? That means the whole series stack is zero-current; effectively supplying zero volts into any load. I don't think your 36V will happen. What might, however, is that the...

If you can, when one cell hits peak: throttle the charge current (and carry on balancing) rather than tripping out. That would cut down on the noise from people worried about cell mismatches.

https://diysolarforum.com/threads/new-wifi-solis-cloud.74360/#post-959361

If it's all Pylontech internals, and it has an RS-232 console: yes. It's Home-Assistant based; a little python shim for talking via a remote TCP-RS232 interface.

Not certain; possibly one of the RHI-(3-6)K-48ES-5G range... But the wire from the CT (down at the grid incomer under the stairs) disappears up into the loft; I've not traced it. It certainly does not go into the second meter they fitted there (sitting on the inverter mains connection).

A grid-current bias register, so I could null out the apparent CT offset. The remote for my house meter, eyeball-averaged, tells me I'm continuously importing 20W from the grid. The CT is, I think, going direct into the inverter (a Solis) so I can't intercept data and apply an offset that way...

Can't tell due to lack of units. If it's 140 deg F I'd be worried. 140 C I'd be running away, fast. But if it's 14.0 C I'd not care.

Pylontech say to have the newest unit "first" (ie. master for the stack). I suspect that's to get the latest firmware version being in control, to the extent that it matters.

So, you're adding new constraints to the solution. Be specific, and don't hide information.

Names like "Gobelpower" and "EVE" come to mind. Also: clever-enough electronics will be able to limit the battery charge current separately from the to-load current.

Even the entire 120A would be under 0.5C for a standard 48V pack built from ~300Ah LiFePo4 cells. If your normal production charge/discharge is 10A, you're not going to be pushing that limit. Your "short moments" could be an issue; look carefully at how long the inverter/charge-controller takes...

Rather than thermovoltaic + PV, I fancy water-cooled PV. Just to give a bit of a preheat addition to the house heating in winter; keeping the PV running cooler is a bonus. Sadly: anything involving a plumber is uneconomic around here the PV cooling becomes less effective in midsummer, just...

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