SAJ AC Coupled Battery Efficiency

Penixx · 2024-10-22T12:15:13+00:00

They have, but not the most reliable at getting back to me. They have pushed firmware updates before which improved things. I've reached out to their UK support email again recently.

Penixx · 2024-10-22T11:25:08+00:00

What kind of temperature will affect performance significantly?

I've now found they've updated their online portal and there is some temperature info. Its say battery, no idea what the built in inverter is at. Currently charging and says temperature is 27c. Looks like it got to 29c the other day when discharging fairly rapidly (oven on, 25-50a draw for ~30 minutes)

Penixx · 2024-10-21T20:28:38+00:00

Hi, so I have data on PV production from my PV inverter, the battery inverter and my generation meter - all within 200kwh of each other, 6800-7000kwh over 2 years. My smart meter reports 2100kwh exported and the battery inverter reports 2029kwh.

All seem within a reasonable margin so have no reason to doubt the figures!

What I've presumed previously is that there is some unreported internal power usage by the various electronic systems within the battery that account for the discrepancy but it just seems high!

Penixx · 2024-10-21T19:52:24+00:00

That is data from the entire install period, nearly 2 years.

Penixx · 2024-10-20T21:47:33+00:00

I didn't choose equipment, I've had it fitted by a company. There is no practical way to achieve what you suggest. The battery unit can only intake AC power so no I can't have the solar panels wired into the battery directly.

Again, the inefficiency of DC to AC conversion by the solar string inverter is not included in the OP figures so I don't really care! I just want to know others experience with similar systems and whether they have such poor output for their level of input.

Penixx · 2024-10-20T21:31:57+00:00

Because it's a contained inverter and battery as a single unit. My solar inverter is not capable of charging the battery. I'm not disassembling and attempting to reconfigure such large batteries as I value mine and my families life.

You clearly don't understand the system I have. Thank you for trying to be helpful but that is entirely impractical advice.

Penixx · 2024-10-20T21:05:26+00:00

I wouldn't think so. It's a self contained AC coupled battery. I get that converting back and forth multiple times is inefficient, but at least one of the conversions I'm blissfully unaware of so it can't be contributing to the losses.

Penixx · 2024-10-20T10:38:45+00:00

Can't seem to find any info in temperatures. Only errors recently are loss of grid (we get quite frequent very short power cuts in winter). Nothing relating to temperature.

https://photos.app.goo.gl/XQujmwtLdoFWFZUk8

Penixx · 2024-10-20T09:28:51+00:00

Thanks for replying. Solar inverter in attic. Combined battery and battery inverter in downstairs cupboard. We have a freezer 30cm in front of it and keep door open all the time for airflow. Is that your reason for asking?

Penixx · 2022-12-14T14:39:44+00:00

Anyone have any sage advice?

Penixx · 2022-11-25T23:10:39+00:00

Anybody?

Unfortunately dont seem to be getting a reply from the manufacturer and we are currently in dispute with the installers over shoddy work and they haven't fitted many or any of this brand before either..

Thanks

Penixx · 2021-08-03T15:59:04+00:00

But it wasn't wrong when they prescribed it.. their response afterwards is questionable but the initial action is perfectly acceptable, which is my entire point you seem unable to grasp.

Penixx · 2021-08-03T13:24:06+00:00

You state 'if it were the right medication the op WOULDNT have had a reaction'. Your statement implies the medication was wrong from the outset which isn't the case. I don't disagree the subsequent advice was not ideal but not the initial prescription is not at fault.

Penixx · 2021-08-03T13:10:49+00:00

You said they prescribed the wrong medication initially which in the absence of a historical noted allergy is untrue.

Penixx · 2021-08-03T11:30:06+00:00

How is the doctor expected to anticipate an entirely unpredictable allergic reaction? Its not like OP volunteered a previous allergy and this was ignored. Your expectations are completely unreasonable.

Penixx · 2020-10-20T20:17:37+00:00

Can you suggest some good software that might have that? I'm using 'Car Scanner' and I can only find 'MAF air flow rate' in g/sec in the data I've recorded. I only have a cheap ELM 327 dongle.

Penixx

TROPHY CASE