dan_b
|
 |
« on: May 08, 2017, 09:57:38 AM » |
|
So my PowerVault experiment continues, and in April it passed a small milestone - I got 100kWh of electricity back out of the unit for the month. Always nice to have a big round number like that - am approaching 300kWh in total now since install too. Feels like the summer months from April-September will be nice and solid.
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
dan_b
|
 |
« Reply #1 on: August 20, 2017, 02:59:23 PM » |
|
If anyone's interested, here's what my PowerVault has discharged these last few months. Jan - 30.67kWh Feb - 31.25kWh March - 74.02kWh April - 102.88kWh May - 97.14kWh June - 103.94kWh July - 94.27kWh
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
Tombo
|
 |
« Reply #2 on: August 20, 2017, 03:30:09 PM » |
|
Hi Dan, How much power has been fed in to it? Thanks
|
|
|
Logged
|
|
|
|
dan_b
|
 |
« Reply #3 on: August 20, 2017, 03:33:35 PM » |
|
Eer, pass, sorry! PowerVault claims a 80% round-trip efficiency for my battery chemistry, so I suppose you could work it out from that?
I know how much my SolarPV generates per-day/week/month too, but again that doesn't taken into account how much the house uses before the PowerVault sees the spare electrons.
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
smegal
|
 |
« Reply #4 on: August 20, 2017, 04:00:42 PM » |
|
If anyone's interested, here's what my PowerVault has discharged these last few months. Jan - 30.67kWh Feb - 31.25kWh March - 74.02kWh April - 102.88kWh May - 97.14kWh June - 103.94kWh July - 94.27kWh
Thank you for posting that information. It's good to see a real world example. Is your ImmerSUN still providing a lot of heat as well?
|
|
|
Logged
|
When you’re thirsty, it’s too late to dig a well. - Unknown
|
|
|
TheFairway
Guest
|
 |
« Reply #5 on: August 20, 2017, 06:07:03 PM » |
|
What are your equivalent import figures?
How much do you think you are limited by battery capacity/discharge rates?
Your winter month figures are probably better than I could achieve due to shading/pitch but i would like to think I could eek out a bit more than that in shoulder/summer months with a battery with more capacity, except with some of the recent weather patterns lasting several days.
|
|
|
Logged
|
|
|
|
dan_b
|
 |
« Reply #6 on: August 21, 2017, 01:16:05 PM » |
|
Here are my 2016 vs 2017 import figures in kWh Jan 368 vs 285 Feb 221 vs 254 Mar 249 vs 177 Apr 153 vs 85 May 163 vs 84 Jun 145 vs 72 July 123 vs 72! So a definite real dent in my import. 2016 vs 2017 ImmerSUN figures Jan 14.9 vs 1 Feb 21.9 vs 3.3 Mar 35.6 vs 9.9 Apr 51 vs 54 May 88 vs 55.9 Jun 84 vs 79.1 July 122 vs 69 As you can see, the ImmerSUN has taken a significant hit in the low months Jan-Mar, but once April hit, there has been enough surplus generation to cover self-consumption, charge the battery and divert to the hot water tank. No gas for the hot water from late April to now. I know I'm limited a bit by discharge rate - for example when the electric oven is used to cook, and if several other big-ticket items are all on at once we can trip over the 1100W limit and import, but it's pretty good otherwise. I think the fact that hte charging is limited to 800W helps keep the ImmerSUN active too. I can see though that I'm limited ultimately by usable capacity of 4kWh. Might have to look at hacking the unit once I'm finished with the UKPN trial and seeing if we can add some extra batteries 
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
TheFairway
Guest
|
 |
« Reply #7 on: August 21, 2017, 04:36:56 PM » |
|
Thanks. That's a useful set of data.
|
|
|
Logged
|
|
|
|
dan_b
|
 |
« Reply #8 on: September 13, 2017, 10:15:45 AM » |
|
Bit disappointed this morning to say the least. Here's the story...
Last week I had a call from PowerVault saying they wanted to run a full charge-discharge cycle on my battery as a diagnostic maintenance check, so could I give them permission to access my battery remotely and basically consume 4kWh of electricity from Midnight last Monday to test it.
This morning I just got a call saying the results of the test show that my Lead Acid batteries are already worn out and need replacing after just 9 months! They claimed they received a faulty batch of batteries from their supplier and will replace them under warranty next week, with a different battery from a different supplier (Gel apparently?) but that doesn't exactly bode well does it. The warranty re-starts with the replacements, but I must admit I'm feeling like I made a bad decision at the moment to go this route!
I guess if they burn out every 9 months and they keep replacing them under warranty each time it doesn't really cost me anything and keeps my batteries fresh, but that doesn't feel sustainable... I did ask if they could swap them for Lithium free of charge as part of the replacement, but alas not.
I'm off to drink some coffee. Will use my 1kW kettle to make the hot water. At least the sun is shining and my panels are putting out 1.68kW at the moment, so that'll be a green cuppa...
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
Tigger
|
 |
« Reply #9 on: September 13, 2017, 10:36:16 AM » |
|
Dan, Relax, seriously. Your supplier has put their hand up to supplying faulty equipment and is replacing them free of charge AND restarting the warranty from the date of change. You don't seem to appreciate how lucky you are, there are hundreds if not thousands of people out there who long for service half as good as you're getting. Now ring them up and say thank you for being such an excellent supplier  Ian. p.s. I am in no way connected to PowerVault, just in case you were wondering......
|
|
|
Logged
|
SN15 (Wiltshire) 30 tubes, south facing gable wall (Navitron Fornax Trial System). Hunter Herald 8, integrated boiler hooked up with Oil Boiler via H2 control panel. Scrounging fire wood wherever possible 
|
|
|
dan_b
|
 |
« Reply #10 on: September 13, 2017, 10:39:42 AM » |
|
Yeah, you're absolutely right - their customer service on this is spot on, they pro-actively raised it with me. I'm chilled 
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
Tigger
|
 |
« Reply #11 on: September 13, 2017, 10:43:05 AM » |
|
Of course, we'll all have set a marker in our diaries for 9 months from now to watch out for a post from a very angry dan_b 
|
|
|
Logged
|
SN15 (Wiltshire) 30 tubes, south facing gable wall (Navitron Fornax Trial System). Hunter Herald 8, integrated boiler hooked up with Oil Boiler via H2 control panel. Scrounging fire wood wherever possible 
|
|
|
dan_b
|
 |
« Reply #12 on: September 13, 2017, 10:45:00 AM » |
|
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
dan_b
|
 |
« Reply #13 on: September 19, 2017, 12:35:41 PM » |
|
So have got 6 of these going into my Powervault at the moment, anyone know much about them?  
|
|
|
Logged
|
3.06kWp SolarEdge system with a split array: 2.18kWp 10x South facing, plus 4x West facing 880W
Mk1 ImmerSUN DHW diverter 4kW PowerVault Battery
Tesla Model 3 Long Range
|
|
|
RIT
|
 |
« Reply #14 on: September 19, 2017, 04:31:06 PM » |
|
So have got 6 of these going into my Powervault at the moment, anyone know much about them?   Only the details posted elsewhere, such as at http ://www.alpha-batteries.co.uk/12v-110ah-leoch-powabloc-tubular-gel-battery/ And only the PDF sheet makes any real sense as it indicates a 40% loss of capacity if you cycle 1,700 at 70% DOD, not something shown in the rest of the text. This figure does at least fit within the stats used by Powervault, even if Powervault does not make any statements regarding long term capacity. Their quoted Tubular Lead Acid warranty only kicks in if the battery drops below 50% capacity, which would indicate it's become scrap and even then they only really offer a discount off their replacement parts.
|
|
« Last Edit: September 19, 2017, 05:19:59 PM by RIT »
|
Logged
|
|
|
|
|