One Year On - Solar Installation

Lupus said:
Have had that, was back up after 5 hours, remember my area is almost as bad as Northriding with power issues
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We can only hope :confused: Batteries haven't fully charged so will make do overnight and in the overcast conditions forecast for tomorrow morning.
 
Neuk_ said:
We can only hope :confused: Batteries haven't fully charged so will make do overnight and in the overcast conditions forecast for tomorrow morning.
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Yup let's hope. Saw they say it's going too be overcast tomorrow. But it's telling me it's supposed to be overcast now
 
Lupus said:
Yup let's hope. Saw they say it's going too be overcast tomorrow. But it's telling me it's supposed to be overcast now
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Mains came on about an hour ago so I am charging the batteries and running the house on mains until 19:00. Tomorrow should be a lighter use day so batteries should be fully charged by PV.
 
Neuk_ said:
Mains came on about an hour ago so I am charging the batteries and running the house on mains until 19:00. Tomorrow should be a lighter use day so batteries should be fully charged by PV.
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Phew, I've done the same a few times when solar hasn't filled the batteries.
 
RonSwanson said:
Tell us more about your Luxpower, is it a Hybrid? Does it have an external CT, and does it blend from various sources?
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They are Hybrid, and blend sources, but with them the GEN port has one function. Only Genny allowed, it can be a bonus if it can be use as an additional power source like Wind Turbines or perhaps those that installed a grid tied system earlier on. Will need to get my hands on one to toy with. Nice display interface in my opinion compared to other inverters for someone that like checking out the display than an app.
 
RonSwanson said:
Tell us more about your Luxpower, is it a Hybrid? Does it have an external CT, and does it blend from various sources?
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The inverter is the SNA 500 WPV, it has off-grid and hybrid work modes. It does not have an external CT (2 internal MPPTs) and can blend, but I haven't played with that too much yet.
 
Hammered today with 10+ hours of load shedding so watching loads closely as our domestic worker is here meaning lots of washing and vacuuming to be done. So far so good, PV generation is good, limiting appliance use but have setup a 2 hour slot late afternoon to use grid and make sure batteries are at 100% before the sun sets.
 
Neuk_ said:
And so it happened, today was the first day I have noticed the PylonTech's SOH figure at 99%...

View attachment 1396145
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How much have you charged them and size of the bank.

I've got 4 x US3000 and 1 x UP5000 batteries and SOH is at 97%. SOH did not go up when adding new batteries which was the UP5000 I added.

Total charge is sitting on 6.71MWh to date. 357 cycles if I take the full 18.8kWh battery bank value.
 
AchmatK said:
How much have you charged them and size of the bank.

I've got 4 x US3000 and 1 x UP5000 batteries and SOH is at 97%. SOH did not go up when adding new batteries which was the UP5000 I added.

Total charge is sitting on 6.71MWh to date. 357 cycles if I take the full 18.8kWh battery bank value.
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Three US3000C so 10.5kWh in total, I have the ESS set to stop discharge at 20% SOC despite them being rated for 5% SOC. Based on 8.4 kWh useable capacity based on 20% SOC, we have used 916kWh out of them to give 109 cycles. Charge in to them has been 228 kWh from grid and 1127kWh from PV, so 1355kWh in total.
 
Neuk_ said:
How so?
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When the batteries are connected to each other, they all work at different loads. The ones on the outside work harder than the ones on the inside or something like that. Let me try find the YT vid.
 
wingnut771 said:
When the batteries are connected to each other, they all work at different loads. The ones on the outside work harder than the ones on the inside or something like that. Let me try find the YT vid.
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I would have thought that the BMS on the battery set to master would 'balance' the charge and discharge between the batteries as best as possible :unsure:
 
Neuk_ said:
I would have thought that the BMS on the battery set to master would 'balance' the charge and discharge between the batteries as best as possible :unsure:
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The BMS only top balances cells when its charging at the top of the voltage curve, it doesn't have any effect on discharge current except looking for over current.

BMS looks at cell voltage high and low, pack voltage high and low and current too high, and temp.
 
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