Sunday, January 16, 2022

Renogy DC-to-DC Battery Charger Installation

The Renogy 40-Amp DC-to-DC battery charger had been on my Amazon shopping list for a while, it went on sale during the holidays, so I grabbed one. I've been planning of getting it anyways for our anticipated Lithium battery upgrade (coming soon). A DC-to-DC charger is needed to limit the current draw from the alternator especially with Lithium batteries as they can continuously draw huge amount of current from the alternator during charging.

According to Mercedes Body and Equipment Guidelines for 2018 Sprinter and older, it states that the maximum charging current for the auxiliary batteries should not exceed 40-Amps. For now, our current AGM coach batteries will benefit from the DC-to-DC charger as it will receive a proper 3-stage charging (bulk, absorb, float) while driving or idling. 

Disclaimer: I'm not endorsing Renogy or getting paid nor work for Renogy.  I find their DC-DC charger cheaper for the features you get compared to other brands like: Victron, CTEK, KISAE technology, and Sterling. I still have to see its longevity though, only time will tell.

Saturday, March 27, 2021

Motorized City Fresh Water Tank Fill Valve with Automatic Fresh Water Pump Control

Like many Roadtrek RV models, the RT Agile has two options in getting their fresh water tank filled, either via gravity fill port located on passenger side door B-pillar or via the city water hookup. I mostly use the city water connection just because it is on the same side where the macerator dump is, and most dump stations/ campgrounds are set up this way. 


Filling the fresh water tank via city water hookup involves few steps and this mod drastically shortens those steps. To fill the fresh water tank, all I have to do now is flip a switch then hookup the city water…and that’s it. No more walking around the RV, opening the sliding door, reaching and manually opening the fill valve, then doing same process in reverse once the tank gets full. 

Tuesday, August 20, 2019

How to beat the Sprinter blues "AdBlue"



There are many confusing info circulating the net about DEF fluids, brands to use, etc. Some Sprinter owners have been told by MB dealers to only use an MB branded DEF fluid "AdBlue" on their Sprinters or the DEF system could malfunction.

The truth is, if the DEF fluid is ISO-22241 certified then it is ok to use as per Sprinter operating manual. I've been using "BlueDEF" brand from my local auto parts store for many years without any problems. 

When my Sprinter NOx sensor went south a few years ago, MB dealer even tested the "BlueDEF" branded fluids in my tank and it passed to their standards, no surprise there. I'm not claiming I'm a DEF expert, just a user trying to save a buck from overpriced MB pee (ok, it's not actually a pee but rather it's a combination of 67.5% deionized water and 32.5% urea.)

Friday, February 15, 2019

DIY Foldable/ Hinged Cornhole Board Game

Most of the commercially available Cornhole Board Games are bulky/heavy and takes a lots of storage space. Although Amazon sells lightweight ones like the PVC Framed Cornhole Set, the bags tends to bounce more on the fabric platforms. They also have a Foldable Aluminum Cornhole Board that weighs about 14.5-lbs. without the bags, but for $85 a set, I decide to make my own.

The DIY board is slightly smaller than a standard size board. Size when folded= 24"×15"×3.5". Unfolded=24"×30"×1.75". Board wt.=8.5 lbs. Bag wt.=1 lb. each.

Monday, October 29, 2018

Driver Operated AC/ Furnace Remote Thermostat Switch

We do use our rear Dometic AC quite often even while under way, but there are times I wish I can turn the AC on and off from the driver seat instead of yelling at the rear passengers to have them operate the Thermostat. I already have a remote generator start switch mounted on the overhead cab so adding a wired remote thermostat switch in that same location will give me total control from the driver seat. The added convenience of remotely shutting the AC and generator before pulling into a gas station, etc. is a much worth modification at least for our RV lifestyle.