Task

As designed, we won’t be able to build them inside the box. Redesign so we can build them in two sections and join. Domino joints need space above for clamps etc. I’ve updated the order of the Domino Joint feature to make it possible to build, but I’m still worried about this... Keep an eye on it...

https://www.electric-linear-actuators.com/collections/high-performance-linear-actuator-f-12000n

https://www.penn-elcom.com/ultra-slim-slam-latch-l2572

Can we remove one solar panel? Normally we have 32 panels, 4 MPPT controllers with 8 panels in series on each controller? I think it’s fine to remove one panel from this… Is that right? Re: Add Starlink mount Each Victron Inverter RS Solar only has one MPPT controller, so this won’t work (I thought it had 2 MPPTs). Consider changing to the Multi RS Solar which has 2 MPPTs. Let’s check we can use two: Check two Multi RS Solar’s can exist on the same DC circuit without interference Using panels of different size in the same string When you have solar panels of different types in series, different voltages don’t matter, but the whole series string will use the ampage of the lowest panel... So if we are going to tweak the arrangement to add the starlink dish, we should choose a panel with the same ampage. https://www.sungoldsolar.com/flexible-solar-panel/tf/ Compatible panels (all 540mm wide) are: SG-TF-S-120W 19.80V 6.07A 1070mm SG-TF-S-135W 22.30V 6.03A 1200mm SG-TF-S-150W 24.80V 6.05A 1330mm SG-TF-S-165W 27.30V 6.05A 1460mm All the smaller panels have less amps so would ruin the total output. I think the best solution is to have a single 165W panel on the top of the garage, which leaves ~900mm for the Starlink dish. Even the high largest dish is only 575x511mm so we have plenty of space for anything else that needs to point at the sky.

Accuride recommend M4 screws for the slide attachment Design strike plate Slide attachment screws: https://www.accu.co.uk/torx-flanged-button-screws/356710-SHBF-M4-8-A2 Slide attachment inserts: https://www.accu.co.uk/self-tapping-inserts/410830-HSTI-M4-A2 Slide to drawer screws: https://www.accu.co.uk/fully-threaded-torx-pan-head-chipboard-screws/651753-SHPCT-4-10-A2 Strike plate, drawer front handle attachment, also latch attachment: https://www.accu.co.uk/fully-threaded-torx-countersunk-chipboard-screws/650950-SHKCT-4-10-A2 Screws for latch: https://www.accu.co.uk/metric-torx-countersunk-screws/474331-SHK-M3-8-V2-A2

These are perfect, but far too expensive: https://www.accu.co.uk/self-tapping-inserts/410830-HSTI-M4-A2

The old chassis needed quite a bit of work to move all the pneumatics and rebuild the battery tray to squeeze in the larger fuel tanks. Looks like the new one will need less work, but probably some. Check if we need Air tanks and Battery trays.

Update the CAD and make sure we’re ordering the right model code. T72192L Sideway door DT6797R Sideway pass-through Someone said it might not be legal to have the main door opening with the hinge at the rear (e.g. so it opens the opposite way to a car door). We need to check this. I think it’s best to have the pass-through door opening so it blocks the toilet door, not the shower (and also entrance) door. This would be the “L” version. I’ve updated the product code.

Options: https://www.samsung.com/uk/refrigerators/side-by-side/rs8000nc--8-635l-black-rs68a884cb1-eu/ https://www.lg.com/uk/fridge-freezers/american-style-fridge-freezers/gslv91mbac/ 380L fridge freezer plus 90L deep freeze https://www.samsung.com/uk/refrigerators/bottom-mount-freezer/bottom-mount-freezer-with-smartthings-ai-energy-mo-387l-silver-rl38c776asr-eu/ https://www.indelwebastomarine.com/int/products/product/show/bi-92-dual/ Fridge: 273L Freezer: 114 + 92 = 206L Energy: 108 + 130 = 238kWh/yr Price: £790 + £1919 = £2709 ✅ Easier to fit into Storage Long ⛔️ Smaller ⛔️ £1300 more expensive 630L fridge freezer https://www.samsung.com/uk/refrigerators/side-by-side/rs8000nc--8-635l-black-rs68a884cb1-eu/ Fridge: 409L Freezer: 226L Energy: 225kWh/yr Width: 912mm Price: £1399 ✅ Almost double the fridge space ✅ Easier access to deep freeze ✅ £1300 cheaper ✅ Frees up the whole of the under-sofa area for more relaxed electrics layout, and perhaps some extra storage ⛔️ Less storage space in Storage port ⛔️ Will have to remove Storage long ventilation? ⛔️ Will have to relocate Ubco battery trays to under sofa? Let’s see if we can fit all this in a redesign of Storage port and make a final decision when that’s done. Result: OK it fits great. Ubco batteries / ventilation doesn’t need to be relocated!

KCT roof watch is 710mm wide… One solar panel is 540 wide, so we would have to increase the total length of the solar assembly (e.g. the truck length) by at least 170… Probably more like 200 to leave room for the hatch to open. This is not the end of the world because the new wheel base is 350mm longer… The solar panels stick up by 30mm, the KCT hatch by 83mm, so 53mm extra height. I think the extra height is the killer for this idea.

Re: SG-TF-S-135W solar panel Re: Multi RS Solar (Dual MPPT) Panel datasheet: https://www.dropbox.com/scl/fi/j65wv14xd2qhx9l7h3fps/SG-TF-S-135W.pdf?rlkey=ifywh90fui6wiu00h9y4rtmwb&dl=0 Victron Datasheet: https://www.dropbox.com/scl/fi/bjwy0yv6hr3nffuy6ox50/Datasheet-Multi-RS-Solar-Dual-Tracker-EN.pdf?rlkey=wphm4ytx1yfif6yij84a2as9t&dl=0 We will have two Multi RS Solars, which each have two MPPT controllers. We will have 31 panels, arranged in three 8S strings and one 7S. In normal operation: MPPT1: 1P8S MPPT2: 1P8S MPPT3: 1P8S MPPT4: 1P7S If one Multi RS Solar fails, we can double up the strings: MPPT1: 2P8S MPPT2: 2P7S* * This string will have 7S and 8S in parallel… I don’t think this will be a problem, alternatively we can bypass that panel and have 2P7S. Voltage Victron max voltage: 450V Victron startup voltage: 120V Panel open-circuit voltage(Voc): 26.2V 8S: 209.6V ✅ 7S: 183.4V ✅ Current Victron max operational PV input current limit: 13A Victron max PV short circuit current: 16A Panel short-circuit current(Isc): 6.42A Panel current at Pmax(Imp): 6.06A We’re only planning on running strings without parallel, so 1P: 1P Isc: 6.42A ✅ 1P Imp: 6.06A ✅ If we need to reconfigure to run two strings in parallel: 2P Isc: 12.84A ✅ 2P Imp: 12.12A ✅ Power Victron max PV conversion power: 3kW per tracker Panel max power(Pmax): 135w 8S1P: 1080w ✅ 8S2P: 2160w ✅

They can’t both charge at the same time, but I hope we can turn the charging function off on one of them? Email Victron to ask.

Changing to 230Ah cells would allow us to fit 3 banks of batteries in each container by only increasing the width by 34mm, which would still fit ok under the bed. This would increase from 62kwh to 71kwh… Also give better redundancy if one bank breaks… Here’s the calculations: https://docs.google.com/spreadsheets/d/1HDJCCxPe_vTsHyQq1_YgeWvUuhZnUDaTOOCOOjih4Tk/edit?usp=sharing However, 6 battery banks instead of 4 means 6 BMSs, 6 isolation switches, more fuses, wires etc etc. Also the TEXU400 busbar panel only has 4 battery connections, so going to 6 wouldn’t be as neat. I think this is a significant downside. We already have plenty of battery at 62kwh. Let’s cancel this idea.

Maybe just open the window?

Ensure they are compatible with grey water tank fittings (that space is limited)

It looks like 304Ah cells are still available from Shenzhen Luyuan with the old style terminals, so probably order them? https://www.alibaba.com/product-detail/Luyuan-1pcs-EVE-304AH-Automotive-LiFePO4_1600301903451.html Also, this guy doesn’t like the new EVE terminals: https://www.youtube.com/watch?v=CF8HzPAW94M

Re: Fridge RS68A884CB1 There’s lots of new options for A rated fridges… needs some research The Isotherm BI92 uses 360Wh/day = 130kWh per year, so we can increase overall efficiency by using a larger fridge with 200L freezer space (approx 150kwh/yr). We will have to redesign “Storage Long” to accommodate the larger fridge, and then the electrical area can be extended to take up the whole of the area under the sofa, or perhaps some storage. Relocate the Ubco batteries to under there too. HOWEVER, the only larger option is the KENWOOD KSBSXA23 https://www.currys.co.uk/products/kenwood-ksbsxa23-americanstyle-fridge-freezer-inox-10249127.html This says it is 130kwh/yr, but I suspect this is wrong. All the other American Style fridges are ~225kwh/yr. I think it’s a typeo, and it’s actually 230kw/yr. Also, all the Kenwood fridges on Which get really bad reviews. Cancel this idea. There’s various other options in the approx 380L size, which all seem to be the same dimensions / approx same efficiency (approx 100kwh/yr). Here’s several “A” rated fridges, all about the same dimensions: https://docs.google.com/spreadsheets/d/1SDxiqekbH_FheuuAaMldKOrHQsfbH_t1TBlW3kVaSCs/edit?usp=sharing Any of these will do just fine. I’ll assume the Bosch but make a final decision later.

Looks like https://esphome.io/components/output/ledc.html will work output a 25khz PWM signal with esphome…

Re: Electrics

https://www.heatweb.co.uk/w/images/3/31/BIP2177sample.pdf

If we decide Investigate removing one of the rear solar panels to add space for Starlink dish [yes, and change the other to 165W] is OK, remove one solar panel from the top of the garage, and add starlink dish there.

Storage Long → Appliances Storage Short → Tall storage Kitchen Long → Kitchen (wide) Kitchen Short → Kitchen (sink) ???

I swapped the rear camera on the CAD with the 360 degree Vivotek FE9381-EHV… This will have a better view, but it’s not ideal…

Emailed support@overkillsolar.com about BMS cooling requirements Overkill solar replied: “The BMS will heat up but will not require extensive ventilation, they can be inside the battery box.  We have not had any issue with confined BMSs”

The current idea of having exposed drawer mechanism looks awful. We need faces to the drawers and a better locking mechanism.

Todo: Make it symmetrical Make the cover plate bigger so it screws into the face Lose the fillet on the outside corners, and don’t have an offset on the drawer Don’t have it in the middle of the drawer, it should be directly on the inside face Don’t cut the recess with “in context” editing because it won’t update when config changes Also fix drawer slides CAD model, needs simplification

See: https://docs.google.com/spreadsheets/d/1h00wqU28yWIK2XiyUNEpeQVpcVhwfItj-e8ixA1E0yw/edit?usp=sharing Looks like the best is 150mm, which gives us the best options for stacks of 2 euro crates without too much wasted space