Solar PV Hints, Tips & Troubleshooting
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Hi All,
I have a quick question on hot water diverters and the immersions ye have. I don't have PV yet, still in the research phase so expect a large post in the near future.
From what I have read on Boards so far, it sounds like people have a standard HW cylinder with the immersion installed. I'm wondering if anyone has a willis heater as seen in the image below, and how do they find it.}
A brief description for those who arent familiar. The willis heater is a small unit (think thermos flask size) that is installed externally to the cylinder. It has a standard 2-3Kw element installed, but does not need to run as long as an standard immersion to provide HW. As this is a large element for such a small volume of water, it heats up rapidly. The natural convection of hot water means that it will exit the top of the willis heater and begin displacing colder water at the top of the tank while drawing the coldest water from the bottom of the tank.
When I first installed one, the cylinder had to be drained thus my initial test was performed with a tank of stone cold water. I pressed the timer button for 15minutes and tidied up after the works. when the timer elapsed, I ran all the hot water I had into the bath to see, and managed to get 2 inches of boiling water before it started to cool(but was still hot)
I don't mean ti hijack a thread, but was just wondering if people have this installed with PV and does it work out better or worse.
P.s. for anyone looking at getting this (PV or not), it might not work well if you have a secondary return fitted (depending on plumbing)
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My quandary continues……
somehow the battery drained to 0% early this morning!!!!
I had a quick look and the charge limit was set at 100amps and the discharge limit was set at 0amps!!! Though I didn’t adjust this at all yesterday!!! I’ve just increased the discharge limit from 0amps to 10amps to see if that solves it.
I should have just touched feck all!!!!
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The first screen is for time charge and the limits only apply during scheduled charging/discharging
The second screen si showing that your discharge limit is only 8amps which is 424W at 53 volts. I do not think this is a temperature thing as it would limit both charge and discharge. Got to battery select and see what discharge limit is set
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@AndyBoBandy Ignore my last post. On the second screen change from 8Amps to 65Amps to match charge and report back if you see changes in discharge rates.
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@AndyBoBandy as long as discharge total time is set to 00:00 it should not discharge. To be sure you can also set discharge limit to 0Amps on timers. The screen that you have below will not charge or discharge as it is set to stop and also total time is 0
Now for the discharge limit reverting back to 8Amps can you tell me what battery profile is selected under battery select? You should have multiple options. The battery profile defines control parameters.
@yankinlk Zoom would definitely help. The thing is this should be fixed by installer. Unfortunately we've seem multiple instance on this forum how 'good' some installers are :(
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Ok, I’ve done that. All set to zero & ‘Stop’
thebSolar ge generating a decent amount now, and it’s all still going into the battery, so presumably it’s doing this to get SoC% back up to 20% and will then start feeding the house again…. Hopefully!!
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Looks like I’m sorted…
checked and battery was at 24%, Solar was running the house and excess going to the battery.
came down and boiled the kettle, and MyEnergi app showed the house using 3kW (all from Solar + Battery, and none from grid)…. (Solar currently generating about 1kW)
Happy days and many thanks for all the help and support.
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