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  • Solar "Hump" for aerodynamics for Class A RV

    I'm currently fitting large 435W on my RV. (82x 40 inches) My idea is to fit the long edge (82 inches) across the roof and create a kind of spoiler hump in the front of the RV. (Primary use - is to clear above the vent) This is recently done in Bus design and I saw it on some newer Class C...
  • DIY Solar RV Carport/Cover Building - configuration Bifacial?

    Used large solar panels are reaching a point, that they are almost cheap as metal roofing. So I'm thinking about combining those two pictures into once concept. I wanted to build a Carport for my RV (20x26 ft) for a while, I figure - could I just use large panels to cover the structure...
  • Victron Energy Blue Smart IP22 as RV Converter replacement?

    Hello, I replaced my lead batteries with a 100AH LFP and now need to upgrade the converter/charger with something which speaks lithium and I don't have to watch it. Doing some research I found the Victron Energy Blue Smart IP22 30A - which has a lot of settings and looks like it should fit...
  • Vertical Bi-Facial Solar Panels, Solar Fencing (not portray)

    Hello, On the topic of using space more efficient: I found these article: https://cleantechnica.com/2022/07/25/new-research-says-vertical-solar-panels-have-improved-performance/ https://www.pv-magazine.com/2021/12/13/frances-first-vertical-bifacial-solar-power-plant/ I just did a few rough...
  • Solar Cargo Trailer Built - System Check Please

    Currently planning a 7x14 or 7x16 Trailer - for towing behind my Class A RV to move to a new property. There we are going to built a small house. During construction this trailer should also server as base of operations to support the whole thing. Storing tools. Washing machine. Etc...
  • New years resolutions: loosing weight in RV 190AH lead replaced with 100AH LFP. -100lbs 47kg

    My Class A AGM batteries started to loose capacity especially when cold. So I got my self one of the newer group 24 LFPs. Elefast 100ah with Bluetooth. My 12V system does only provide power to the lights, furnace etc. The 120V side is covered by a higher voltage solar system Currently...
  • DC-Living, all DC appliances for new Tinyhouse -Offgrid project?

    Currently looking into moving to a new property (likely a blank Canvas) Been doing a bunch of calculations on the power system, and since I'm getting all new everything. I was wondering if instead of paying for a big inverter (AOI) - should just get all DC appliances and potentially a small...
  • Active Current Limiting BMS - Alternator protection option?

    Hello, I found this video from off-grid garage reviewing a SEPLOS BMS. It seems like it has a configurable active current limiting feature. He describes it as PWM circuit. A battery with something like this should solve most alternator related concerns correct? Two main things kill...
  • One MPPT per Panel? What are the downsides - upsides DC / AC

    I'm just getting a bunch of quotes for my house Solar System. Most of them are Enphase Microinverters, which are AC coupled. Now my question, can you do this DC? I want to do build a DIY power-wall anyhow. Cost aside. I have a weird roof shape with shading, so one or two MPPTs for 8KW...
  • "Why I think it is illogical to purchase an electric truck"

    Lets have a discussion here ;) While I agree with many of @Will Prowse points in the Video about what a Truck should be used for. Most people don't use them the intended way: https://www.motorbiscuit.com/truck-owners-need-full-size-pickup/ "from 250,000 persons, 75% of truck owners use their...
  • Using RV-Solar System to power House?

    I'm currently researching to put on my Motorhome Further I'm interested in putting Solar on my house. Now on average I use the RV 60-90 days out of the year and when I'm not at home - I don't need lots of power. So would be a waste to have a nice system on the RV and only use it that little...
  • Looking for All-in-One Recommendation for Motorhome

    So I just got the proud new owner from a used 25ft Class A Motorhome. It has the standard RV-power Lead setup. 1 Chassis Battery 2 House batteries A completely oversized 5500w generator Currently the house batteries can charge from the Converter or the Engine. Requirements: We are using...
  • Chins 24V 200AH 200A

    Just found this one on Amazon: https://www.amazon.com/LiFePO4-Battery-battery-Support-Off-Grid/dp/B08Z3TV494/ref=psdc_15719921_t2_B08P6LP1J9?th=1 Rated Capacity (0.2C): 200Ah / 5120Wh Cycle life: 2000+ cycles at 80% discharge depth Rated voltage: 25.6V Charge voltage: 28.4V - 29.2V Depth of...
  • DC- Switching or connectors between two Solar Strings - RV <-> Solar Carport

    I got an RV with a 900W of Solar (2000w MPPT) and was thinking about building a Solar Carport (3-5kw) - to park the RV underneath. https://understandsolar.com/solar-carport/ As soon as I get the RV parked I would like to switch to the stationery system. Sure I could just have a few MC4...
  • RV All-in One Diagram ready for critique

    This came out of the replies I got from my initial thread: https://diysolarforum.com/threads/looking-for-all-in-one-recommendation-for-motorhome.20943/ Please take a look and let me know if I miss sized wires or fuses before I go on a shopping spree :P
  • AmpereTime (LiTime) 24V 100AH LiFePO4 2.5kWh + 10A 24V charger

    For sale a AmpereTime 24V 100AH just about 1 year old. 5 year warranty. Had it in my RV - but upgraded to a 24V 200AH. Didn't see many cycles, pulls full capacity according to my Growatt inverter. Using the RV maybe 50 days a year. $500 shipped in original packaging (double foam + 2x...
  • Amperetime / CHINS 12V 100AH enough to start RV Generator?

    Hello, my 2x 12V deepcycle batteries in my RV are just about to die. I got a 5500w Onan generator, which starts from those batteries. The Amperetime and CHINS 100AH have those ratings: Maximum Continuous Charging Current: 100A Maximum Continuous Discharging Current: 100A Maximum...
  • Please help improve my current Van system and Expansion to Solar A/C

    My Current Setup So this is my current Van-Setup. Working very nice for 4 years now. Yes I got redundant PSW charge controllers (Amazon send me two when I ordered one), my panels are angled different direction and I got the feeling that with one controller per panel it's harvesting more. The...
  • Growatt SPF 3000TL LVM Physical Dimensions ?

    Hello Growatt users, every supplier I look at has different dimensions of the SPF 3000TL LVM listed. Everything from 23 inches x 17.3 inches x 9.2 inches to 17.9 x 17.8 x 5.1 Could some please shed light on this mystery and measure the width and depth of the Growatt? I'm working with a...
  • 48V DC - Gasoline Generator Onan RV replacement

    My RV has a old Onan 5500 Generator which it's on it's last leg. RV generators are rather expensive and put out 120V - 240V So I was searching - could I replace the generator with a DC-Direct Gasoline generator? V5 AutoGen 48v DC Generator Charger 70 amps maximum...
  • Under-Bench Mounted Heatpump for Running of Solar and clearing roof

    Hello, I found this under bench mounted heatpump - it was released only in February 22. Pioneer® 9,000 BTU 115V Under-Bench RV Heat Pump Air Conditioner $1200 Summary- Cooling capacity: 9,000 BTU/H with 8.5 EER efficiency 8.8amp - 995 Watt Heating capacity: 9,000 BTU/H with 2.6 C.O.P...
  • EG4 PowerPro WallMount - in Cargo Trailer. Safe mounting.

    Hello, I have a cargo trailer with many nice solar panels and I bought a EG4 PowerPro WallMount. Which will be connected to a 6000XP Now need to figure out how to mount this heavy thing safely for one trip. The cargo trailer is used primary to support my move from one state to another and...
  • Overpaneling Growatt spf 3000tl lvm-24p

    I got a Growatt spf 3000tl lvm-24p can handle 80A on 24V - which is right around 2000W of MPPT How much panels can I safely? The local 450W panels which are cheap are right around 50V OCV and 40V MPPT - the maximum input of the Growatt is 145V - so to play it safe from the voltage I...
  • Server Rack - using internal busbar for multiple inverters

    Hello, I'm following the 48V Blueprint: https://www.mobile-solarpower.com/48v-complete-system-blueprint.html I was just wondering - why is Will is using an external Busbar again? The internal busbar in the Server rack is pretty thick. Just came up with this design: Just omitting the external...
  • 500W Panels - back mounted - 4 bolts only?

    I was wondering - my new 86 inch x 41 big panels have only 4 holes in the back for mounting. While some smaller panels I have - had 6 or 8 holes Are 4 bolt sufficient? I can understand with front clamp mounts - yes 4 bolts are usually ok. But with the thin aluminum frame at the back - even...
  • 12V 100AH MINI or Group 24 with Low Temp protection? Bluetooth would be nice to have.

    Looking for my RV - I can only fit a Group 24 Size. The newer Minis would fit as well. I need a battery which can still discharge when cold - but stops charging when getting frozen. It is really just running lights and the furnace. No need to get fancy ;) I got a 10kWh of batteries on 24V...
  • BMS for 6V Lead batteries system

    I got a 6V battery systems in my Golf Carts (at work) which served me fine for years. They have 6 batteries (36V) or 8 Batteries (48v) So I noticed that always the first battery in the string on one (sometimes positive, sometimes negative) side goes out of balance - even with equalizing...
  • Growatt SPF trips GFCI occasionally.

    I have a Growatt SPF 3000TL LVM and installed it in a RV. It's working great, aside from one little issue. Input GFCI trips occasionally. When I'm at home I plug in the RV with an adapter into an exterior 20A outlet (reduced the charging rate) which is protected by an GFCI outlet. After...
  • Need to expand my RV System - Hurricane Ian took out power grid in my County.

    Fort Myers checking in - thankfully we left and are safe but we want to get back at some point. So usually I use this setup for camping and not live full time. Now we might be forced to RV living for the foreseeable future, since the power grid is destroyed down here So my question is - how...
  • Mismatched Panels - 2 Panels Parallel to 1 in Series

    Hello, I got an RV with 2x 72V 435W Panels and found space to add another 445W panel. Constrains: Unable to find another of the 72V panels - those are like unicorns. MPPT max voltage of 150V and I don't necessary want to add another MPPT controller since my Growatt has plenty of capacity...
  • Ampere Time 48V 90Ah Lithium Battery - $1200 at Amazon

    https://smile.amazon.com/Lithium-Battery-LiFePO4-4-60kWh-Lifetime/dp/B0B4KD13WN/ Any good? 90A BMS seems odd. 90AH ? weird numbers but good price.
  • Chins Bluetooth BMS State of Charge? - in parallel with non-Bluetooth battery

    Hello, I currently have one 24V 200AH Chins battery: https://chins.shopping/collections/12v-lifepo4-series I want to buy a second one - and got told by the Chins seller that the next version will have a Bluetooth BMS with app and state of charge. So I wanted to put those batteries in...
  • 24V 10A LFP Charger $60

    Hello, got 24V 10A LFP charger 29.2V for sale. Which I thought I use - but didn't get around since I bought an All-In-One Inverter https://www.aegisbattery.com/products/29-2v-10a-li-ion-battery-charger-for-24v-batteries-lfp $60 + Shipping from Fort Myers.
  • BMS instead of Fuse/Breaker

    This is danger zone - so here it goes: After watching a few Tesla Teardowns I realized - they don't have fuses anymore in most places. They call it virtual circuit breaker or e-fuse - a piece of software monitors the current and shuts down the power when it exceeds are certain threshold. Most...
  • Autostart for Onan RV Generator - Growatt

    I got a Gasoline Onan 5500w Generator in my RV which I want to control with my Growatt NC NO contact. The Growatt switches when the battery voltages goes to low - and switches back when sufficient charged. Means I got a high signal while it's calling for charge. My Onan expects something...
  • Growatt 3000 24V + Amperetime System check and settings.

    Hello, I'm planning a RV system There are the settings from the Amperetime 24V battery - just want to make sure that I put them under the right spots in the Growatt: MENU SETTING in GROWATT #: 01=SOL (Solar First) 04=SEN 04 (Saving model enabled) I'm only running the A/C unit, Microwave...
  • ECO-WORTHY 1500W 24V -> 115V experiences? $200

    Anyone know anything about the ECO-WORTHY 1500W System? https://www.eco-worthy.com/products/all-in-one-inverter-built-in-1500w-24v-pure-sine-wave-power-inverter-50a-controller-for-off-grid-system I couldn't find a manual or any further specifications. I want to built a solar system for my...
  • Charging LFP below 32F - 0C freezing temperature - possible - with newer chemistry?

    We are getting drilled in by Will and other people knowledgeable about the subject - do not charge below freezing. Like every other knowledge - that piece of advice has an expiration date - since technology moves on. There are more and more manufacturers are coming out - saying - we don't do...
  • Elefast 100AH battery - BMS shuts down - claims over temp 90C ?

    I had my RV sitting the last days and it was charging with a 100W panel and LFP charging profile. So today I came into the RV everything dead. - So I pulled up the Bluetooth app and the BMS claims that the battery is at 90C and the Discharge MOS is disabled. A bit nervous I got a wrench...
  • 24V Hybrid Inverter with 200V+ MPPT?

    I currently have 24V system (10kWh in batteries) in my RV and want to add a few more panels. Not necessary want to add another MPPT box to the wall since I like the clean look and compactness of a all-in-one. I'm thinking about using the 24V Growatt I currently have in a shed project. The...

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