Recent content by asot550

I'm in the process of planning a sliding solar panel setup for the roof of my RV conversion and I'm pretty confused about how to best wire up a system to capture the most energy. The plan is for two ~400-450w panels (probably bifacial but I don't think that matters much for this discussion)...

I was trying to figure out how Renogy's 450W bifacial has the exact same specs as its 450W mono panel except being a couple pounds lighter than its opaque backsheet brother. Turns out its because they use the transparent backsheet mentioned by rhino. I did quite a bit of searching and it's been...

The submittal data for the Fujitsu has a cooling range of 3100-12000 BTU and an input power of 110-850kW. That works out to a COP range of 28.2-14.12. You're right though, the rated power is exactly 500W for the 9k BTU nameplate.

Does anyone have experience using a 110v to 220v transformer in a mobile application to run 220v appliances? I'm thinking of using a toroidal based transformer that's typically used for US to Euro appliance conversion. The specific use case is to run a 220v mini split which typically has better...

Ha, after all this i just found out that the 2020 express cutaways come with a 150amp alternator standard. That's still not enough for fast charging, but a small charger shouldn't be too much issue. I'll have to use a clamp meter and do some testing to confirm, especially since I'm planning to...

Maybe a silly question, but can someone help me walk through what the potential panel degradation and hotspot concerns might be with an offset stack of bifacial panels on a vehicle roof? I'm planning to do a double stack of panels with drawer slides to extend at least one (possibly both)...

Love the design! I can tell some thought went into it.

If you read through the procedure Gary addresses some of your concerns. The trip meter and mpg were reset only once 65mph was hit, so acceleration shouldn't be a factor. I agree that logging the injectors would be more accurate than the dash, but a previous test he ran with vortex generators...

I'm seeing a max difference of 7.7% run to run, but his four runs per "design" should hopefully mitigate some of the randomness. You're right though, it's not a perfect test which would be nearly impossible to conduct. Do you have a source on that ford transit epa data? As a commercial vehicle...

There's some really interesting arguments made by GaryBIS (https://www.buildagreenrv.com/mpg-penalty-for-roof-racks-on-camper-vans/) on the Ram promaster forums that more solar isn't always the answer from both a cost and environmental impacts standpoint. Roof racks and solar panels on the roof...

Has anyone purchased a Fivsta Sola panel from Amazon and have experience with them? Looks like they're a relatively new brand on Amazon and they have some interesting panel sizes (squarish, as well as long/skinny) compared to others, as well as bifacial options. The 200w squarish bifacial is...

2020 express 3500 cutaway, with the 6.0L Vortec V8.

Yeah, I'm not trying to get the max power out of alternator or really do any ridiculous levels of charging though. 250-500w just to supplement solar. What's grinding my gears is there doesn't seem to be any reasonable cost commercial options on the market that do what I feel should be a...

Just looked up the wakespeed and it's a sweet product! Pricey though... Victron has a very programmable 25a buck boost converter that's a similar price point and has many of the same features. Neither option gets around the alternator being the biggest limiter for high current applications.

Ah, I understand now. I'm planning to limit all of my charging profiles across all methods to 90% of full capacity in order to hopefully limit over-charge concerns as well as to increase the battery life. I'm planning for a 20% lower discharge cutoff point as well. I posted on the forum...