Thanks for the info. I have set the PV Parallel Enable to “Off” as recommended by the previous post from Bluetti.
Moving to step 3. “The roof solar panels are connected to D300S as shown in the figure.
Please make sure that one set of solar panels is connected to PV1, and the other set of
solar panels is connected to PV2. Be careful not to mix them.”
I had 6 Hanwha Q-Cells Q.Peak DUO BLK ML-G10+ 400W, OCV 45.30 each, Three panels on DC1 and three panels on DC2 hooked up before I installed the D300S and all was working well. I was getting a max of 1.7 on a nice sunny day. I am now adding one extra panel to both DC1 and DC2, to give each 4 panels, meaning 4 panels in series for each string.
I have connected the panels to the D300S as shown in the instructions. I have an IMO PV Array Isolator switch which I turned off while connecting the two strings of panels to the DS300. Turning on the isolator switch and with my multi meter, I am seeing max voltages of around 176 volts on each string inside of the switch housing which is about what I was expecting this time of year. At the time of this message, I’m getting around 153v - 166v due to some high clouds.
On Step 4: “Connect EP500Pro with D300S with DC Output Cable(Included).” Again, I have a AC300 so I hooked up my “DC Output Cable” to the D300S and the AC300.
On Step 5: “Turn the main switch from OFF to ON to activate the solar charging system.” I turn switch to “On” and I hear what sounds like a relay inside of the D300S. It clicks twice with about a half second between clicks.
I checked my AC300 but see no voltages coming in. I wait for 30 to 45 minutes, checking frequently, but no voltages coming in.
I pulled the DC Output cable from the AC300 and see no voltages on the DC Output Cable from the D300S using my multi meter. Note the D300S and DC Isolator switch are in the “On” position.
I switch the D300S from “On” to Off, and then back “On” again with out it being connected to the AC300, and I get voltages on DC Output Cable on both DC1 and DC2.
This is repeatable. When the DC Output Cable is connected to the AC300 and the D300S is switched to “On”, one cannot charge from the solar array connected through the D300S. Why are the solar panels not charging the AC300 through the D300S?
Thanks in advance.