You don't need a DC/DC, just a bridge rectifier. Aim for 2x peak current rating and 2x peak open circuit voltage to be on the safe side. Bridge rectifiers are dirt cheap anyway.
After months is search, the only suitable candidate I've found is the Deye SUN-10K-SG04LP3-EU.
Except for the fixed scheduling, the only way I've found to automate it is via MODbus commands. Deye took months to respond to my email but understood what I wanted to do and did send me the MODbus...
Thanks! I need to look deeper into Schneider, Outback, Enphase and Sol-Ark.
SolarEdge had 5 kW max for both charging and discharging. Charging is fine as prices are low from about 23 to about 05, so plenty of time to charge slowly. 5 kW max export on an overcast day will be a limitation though...
As an EE, this is a software lockout for sure. They need to have four-quadrant inverter towards the grid and bi-directional DC/DC between low voltage battery and the inverter DC-bus, so all hardware is there to do the export. A friend of mine connected a HV EV battery in his car to the PC input...
This is the only option I have found so far. Do you have any experience with it? Especially do you know if the fixed scheduling can be overridden from web, RS-232, RS-485 or similar? My computer (or Arduino, haven't decided) will download prices for the next day on wholesale market and run a...
I don't own the Deye yet, just planning on getting one, but it could simply be the case that the info panel on the Deye does not support this. Have you considered a third party solution, for example Solar Assistant?
Thanks. Uses 600 V battery which would complicate things a lot on the battery side but as an EE, I understand why from the manufacturers point of view.
I tried to search but not much showed up. "export from battery" turned up a lot of "zero export" results, which is opposite of what I need.
I'm about to install PV panels and a hybrid inverter. I already have about 50 kWh worth of cells. With night-to-day price difference skyrocketing here...
Sweden. All power companies except the island of Gotland is required to accept solar installations. Energy meters installed can already measure power in both directions.
The Schneider XW pro 6848 did mention both dumb lithium, lead acid and two-stage charging curve so seems very DIY friendly. I...
Rules differ between Sweden and California. Yes, as long as you are approved to export here, you can export as much as you want up to the limit of your fuse (comes in stepped tiers, 11, 17 or 24 kW). Exporting 30 000 kWh/year or more will however be above the bracket for when you get solar...
Thanks! If the rules would change in the future here, it would still pay for itself, it would just take longer so less ROI. Plan B is to charge on cheap electricity during night, use it myself during daylight hours and force the inverter to export the solar to the grid and use battery to offset...
Voltage at the beginning is what drives the current. If you already have your current, all you need is current and resistance to calculate your voltage drop. What you're after is final voltage, which is something else.