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There's a very strange feature of this forum that needs to be addressed. If viewing this website on a mobile device, signatures do not appear at the bottom of posts unless the mobile device is being held in landscape orientation. This makes little sense. The website shows more vertical...

I just saw a van with two flexible solar panels mounted directly to the highly curved roof. The centerline of the curved roof might have been 4" or 5" higher than the sides. The panels were mounted with the long edge of the panels perpendicular to the centerline of the van. With the curve no...

Would it be possible to update the forum software so it strips Amazon URLs to the bare minimum needed? Many people paste Amazon URLs into posts and most of these URLs contain far more junk than is necessary. Many look like this...

The following are common units and their abbreviations. Note that unit abbreviations are case-sensitive. While some units can be understood when written incorrectly, some have a completely different meaning if the wrong case is used. Avoid any possible confusion or ambiguity and use the correct...

Will recently posted a teardown of the upcoming SOK 48V 100Ah server rack LiFePO₄ battery. I noticed it has two positive and two negative terminals. This might end in a face palm but can someone give some examples of why this would be useful? In typical setups with multiple batteries in parallel...

For the last few hours my battery monitor was showing 16 extra watts being drawn from my battery than I normally see. I could not figure out where it was coming from. I finally found that a rarely used light switch for an external LED light was on. I must have bumped it unknowingly. Anyway...

Since @Will Prowse is having issues with his new Model S, I offer this from the Beyond the press YT channel:

I don't know how this got started but the Internet is filled with people that use "looses" when they mean to say "loses". I can certainly understand the issue for people that must suffer through learning English as a second language but I see so many English natives use it too. loose - an...

With the colder months coming soon I wanted to do a sanity check. Now that I'm living in my cargo trailer camper full-time I wanted to see what others' experiences have been. I'll be in the northeast (NJ,NY,PA) in December and then I'll be in the Salt Lake City area January-April. Needless to...

I seem to have a good problem to have but I'm worried about the effects on my batteries. I have two 12V 206Ah LiFePO4 batteries in series (24V) and 990W of solar (3 330W in series) setup for my cargo trailer camper. On a sunny day I can run the A/C from noon until an hour or two after dark, run...

I've just recently mounted three 330W panels in series (990W total). They are Silfab SIL-330 BL panels. They are mounted flat on the roof of the trailer. It is 2pm as I type this, 90ºF, and the sky is gray with 99% cloud cover. I'm at 39.75ºN latitude. I just checked and my panels are producing...

This is a like new Victron Energy MPPT Control. This was purchased for use in a camper conversion. It was installed for a short time during the camper construction. It has been tested and it works perfectly. But my plans changed and I no longer need the control. It is still in perfect condition...

This is a like new Victron Energy Digital Multi Control 200/200A (metal faceplate). This was purchased for use in a camper conversion. It was installed for a short time during the camper construction. It has been tested and it works perfectly. But my plans changed and I no longer need the...

Today I finally got my solar panels installed on the roof of my cargo trailer. Before I connected the PV wires I first turned on my charge controller which is all wired up to the batteries. I also turned off the PV breaker that I have between the panels and the SCC. The breaker is only on the...

Today, for the first time, I had my complete electrical system all connected in my cargo trailer so I made my first attempt to charge my LiFePO4 batteries using the Multiplus inverter/charger while connected to shore power. After roughly 90 minutes of charging the battery monitor has detected...

I'm still building my mobile solar setup. I have 3 panels in series with a Voc that can be 145V @ -25ºC. I have a Victron 150/45 SCC. In between I have a MidNite Solar MNEPV-20 circuit breaker on the positive PV wire just before the SCC to act as a disconnect. Is anyone using this supposed 150V...

Today I finally got far enough into my electrical setup on my cargo trailer camper conversion that I was able to start setting up some of my Victron components with my SOK batteries. But I am unclear on what some of the settings need to be while configuring the components using the...

For my cargo trailer I will have 3 panels in series with 10 AWG PV wire running to a Victron 150/45 SCC. Next to the SCC I have installed a MidNite Solar Baby Box. I have two MidNite Solar MNEPV-20 (150V, 20A) polarized breakers with the intent to install one on the positive wire and one on the...

As part of mounting solar panels to the roof of my enclosed cargo trailer I need to install rivnuts in the roof beams from the outside of the trailer. The aluminum skin of the trailer is attached to the steel tubing framework using some sort of adhesive. The result is that the aluminum is not...

I'm finalizing my rack for solar panels on my 7'x14' V-nose cargo trailer. The trailer's roof frame is curved (roughly 1" taller in the middle than the sides). The steel beams are roughly 16" on center. I am installing three 330W panels (Silfab SIL-300BL) that are 66.9" x 39.4" and 41 pounds...

Is it OK (safe) to put a 400V/32A AC breaker and a 150V/15A DC breaker in the same breaker box? Details: The 400V/32A AC breaker is a dual pole breaker between the 120V/30A shore power plug and the input into the inverter. The 150V/15A DC breaker is a single pole disconnect breaker between...

Attached is a PDF of a schematic for my planned electrical system for a cargo trailer camper conversion. This is a 24VDC system. Major components include a 24V/2000W inverter/charger, an MPPT charge controller, a battery protect, probably 4 x 300W (2S2P) of solar panels. This setup supports...

Just a sanity check. For my upcoming cargo trailer conversion (picking up the trailer Saturday) I will have a 24V battery bank. I'm planning to have some fairly standard 12V puck lights in the ceiling. Let's say I wanted 6 of the 12V puck lights on a single switch. Is it correct to wire them as...

This is a general question. I need a small rocker switch with an LED that will be lit when the switch is on. The switch will be used to power some LED lights. My question is can I use such a switch rated at, for example, 12VDC 20A in a 24VDC setup if I keep it under 10A? Or do I need to find a...

I have a basic understanding of how to size fuses used for individual components within the system. But I want to verify the proper way to size the main fuse that is between the positive cable off of the battery bank and the main positive busbar. Attached to my busbar will be two cutoff switches...

I'd like to confirm a few things about connecting the solar panels together and using a breaker. Let's say I plan to use four 300W panels wired in 2S2P. Am I correct that I simply wire two in series, the other two in series, and then use a pair of MC4 Y connectors to make the parallel...

I'm working out the details of a solar electrical layout for a trailer conversion. I'd like some confirmation on some of the needed wire size. I am planning on four 12V 100Ah LiFePO4 batteries in 2S2P to give 24V 200Ah. I am planning on the Victron 24V 2000W inverter/charger. Its manual states...

I'm getting confused as a solar newbie trying to work this out. Let's say I plan on having six 12V 100Ah LiFePO4 batteries wired as 2S3P (I think) resulting in a 24V 300Ah bank. Since the batteries are really 25.6V that's a total of 7,680Wh. Assuming 6 hours per day to charge, I need 1280W of...

I'm just beginning my research into a solar setup for a camper. I'm strongly considering 24V. Let's say I want to start out with 100Ah of battery at 24V with the idea to expand to 200Ah and maybe even 300Ah in the future. Now let's say I'm looking at the Battle Born 12V 100Ah batteries or the...