KauaiMolokai
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OK, but lets finish this so we're sure about the cells.
Im losing my mind!!
- Thread starter gmehal
- Start date
OK, but lets finish this so we're sure about the cells.
MisterSandals
Participation Medalist
Agreed.
But he has 26.5v from 8x 3.3v cells so not sure charging is the issue at the moment (maybe next!).
Also disturbed by the 17v battery shown in Victron display.
I wonder if it'll be helpful to disconnect the solar side of SCC entirely and see if the SCC picks up the correct voltage.
Also it's not clear to me from the pictures how the SCC is connected to the batteries. I think there's a shunt on the main positive and both SCC and inverter connect to the shunt?
Also it's not clear to me from the pictures how the SCC is connected to the batteries. I think there's a shunt on the main positive and both SCC and inverter connect to the shunt?
onemorebattery
Git'r done!
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OP has a modified sine wave inverter and the 98 volt RMS reading is typical.
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A modified sine wave will make a UPS go ape shit. Power strips with surge supressors won't like it either.
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I always set the SCC to 12v or 24v depending on config.
My power strip does have a surge supressor. My Killawatt meter also dosent work when plugged in line, strange. I thought the inverter was supposed to manage output voltage to be able to use any AC devices.
Correct on the shunt. I added that when I was trying the ElectroDacus BMS, just left it there afterwards. I did try it without the shunt, no difference.
I have also tried it without the SCC connected
Island solar
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Perhaps a bad battery that breaks down underload, registers ok with no load?
What would be the best way to determine that?
Yes, but your solar panels need to put in voltage that's 5V higher than the battery voltage for it to start working. For example, if your battery voltage is 25V than your solar panels need to put 30V or higher before SCC start charging your battery.
How do you connect the panels together? Are they all in parallel? If so, you don't have enough voltage to feed a 24V system. You'll need to have at least 2 100W panel in series to have high enough voltage.
I cant remember, ill verify them in a few hours. If I remember right I have 2 100w panels using mc4 2 to 1 Y connectors and the other 2 are just like that for a total of 4. Then I have one random 100w panel as well. They all go into a combiner box.
Sounds like you have them all in parallel. You'll need to series connect the pairs and get one more panel (or disconnect the lone 100W). You can still use this configuration for 12V system as your SCC will properly convert the voltage according to your battery voltage.
KauaiMolokai
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Hi G, just PM me if you decide to get back to the step by step approach. Take care.
Island solar
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Check the voltage under load (with a any 24vdc load) if you don't have a 24v load, a incandescent light bulb would light dimly
Island solar
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test by connecting a load to the 24 volt bank.
MisterSandals
Participation Medalist
Test the voltage at the studs on the back of your 24v inverter (especially when it's producing 98v AC).
Thanks will do
Ok so now that I have wired the 4 panels in series and its now charging the 8S into the 24v inverter. It seems to be outputting power now but as quoted above it seems to make the power strip surge supressor and the KillaWatt meter wacky. My laptop is charging through the KillaWatt meter but the meter reads zero for all measurements. Is this because the inverter is a modified sine wave inverter vs a Pure sine wave inverter?
Again thanks to everyone for all their help, Im almost there!
vk2emp
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Connect a fan to the inverter output (the type you use to stay cool in summer). If it buzzes loudly, the inverter is definatly the modified sinewave type. Some equipment really HATES MSW inverters, and won't work properly, which is probably what the surge protector and Kill-A-Watt are doing.
With regards to the display on the Giandel inverter, if the OP can read it fine, its just multiplexing making it difficult for his/her camera to capture the display. Multiplexing is a trick used to reduce the power consumption of a display by only lighting one segment at a time in rapid succession. thanks to persistence of vision, our eyes can't tell the difference, just the same as they are tricked by the rapid stream of still images that make up a television picture, but a camera with a high shutter speed can pick it up, making the display look faulty.
With regards to the display on the Giandel inverter, if the OP can read it fine, its just multiplexing making it difficult for his/her camera to capture the display. Multiplexing is a trick used to reduce the power consumption of a display by only lighting one segment at a time in rapid succession. thanks to persistence of vision, our eyes can't tell the difference, just the same as they are tricked by the rapid stream of still images that make up a television picture, but a camera with a high shutter speed can pick it up, making the display look faulty.
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