Solar for Beginners [ask your questions here]

Do you have a per-string graph or is there only the option of a combined "PV output"? I ask as that curve isn't what I'd expect for a combined E and W string, the peak of the curve is appearing before noon and you're not getting the effect of the W string.

Your graph:

The rough shape that you should be seeing (the white line):

You could pull out the cable from the E string one night and see what W does the next day - that's what I'd do.

Pull from the inverter. The inverter should be isolated from DC when doing this.

Section 5.15 and 5-16 of this link:

https://support.huawei.com/enterprise/en/doc/EDOC1100136173/6780ab51/connecting-dc-input-power-cables?idPath=258788303%7C254827209%7C258792409%7C22027611 You don't normally need the tool to do this as the fingers are exposed on the MC4 connector.

I would double check the evening first. On your screenshot it says 10.35( does this mean at 10.35 pv2 was 0 amps) if yes , then this is might be normal because pv2 would have a minimum start up voltage that hasn't been reached by 10.35. this would be normal.

Try looking at the same screen again but instead hover curser over a point later on the afternoon and see what it says.

I'd get the installers back at this point - swapping the polarity around makes sense, but not when it's not your issue. You could test it with a digital multimeter, except you'd need a CAT II type (1000v) with good quality leads as the DC voltage can be in and around 550v.

Have had a couple of companies out to do surveys and give me proposals (neither on the Boards list of suppliers, albeit both seem reputable... ).

We have large leylandi trees beside us (probably 30ft) but owned by our neighbours. In summer they would cast shading on about 1/4 of the proposed panels at evening time.

One company said we should include optimisers on those affected panels, as 'the panels will only work as well as the least efficient panel'. I challenged him on it, as it is surprising to me that they are not completely independent when they contributing to usage /grid /battery - was he correct?

*I've reported the trees to esb as there is a pole and cable within the trees and I'd like to trim them down.

Hi guys, question.

Can I use the a timed discharge function from my inverter to trigger my eddi to heat my water tank?

I've briefly looked into automation and I won't be looking again, waaay too involved.

The plan would be to fill the battery using cheaper night rate electricty, program the battery to discharge to grid, use the eddi to divert this current to the water tank and then refill the battery once the tank is up to temperature (timelines yet to be determined)

This all makes sense in my mind!

Can it work?

Thank you. Didn't realise there was a built in timer.

You'll get many opinions but I would say get as much use out of it as possible. No point trying to mind it for some arbitrary reason. You paid for it so use it! I have a weco which can run down to 0% but the solis Inverter won't allow that so I have it set to lowest it will go which is 5%. I top it up on the cheap rate every night.

The depth of discharge will depend on the BMS settings. Some are set to allow you to discharge to 0% as the protection is already configured in the BMS.

For your battery the depth of discharge is 90%.

I'll bet the solis won't let you set it lower than 5%

Set the Solis to 10% and the grid charge to 8% and it seems to have saved. Will have a look at how low it gets.

Is it reasonable to assume fit payments will be halted in coming years? In Holland and Oz in coming years, homes will be charged for excess electricity sent back to grid I'm reading.