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I based my comment on my observations with which I started this thread. Your data shows that the MPPT input voltage was 113.9V, less than the rated max of 250V and current was ~40 Amps (assuming that your battery bank 48V), less than 50% of the rated max output current. This is the sweet spot...

Trying to come up with ways to manage heat is good, but a reputable vendor like Victron should not be making controllers that waste 10-15% of the harvested power in the heatsink. We need a a MPPT solar charger that 95% or more efficient at the rated max input voltage & output current.

In principle, this would work. However, it'll take a very long time (100 hrs or more) to complete the process since you're approaching the target voltage asymptotically. Despite widely used, voltage based charging is not the correct approach. However, it is easy to implement. Since we're tying...

I'm wondering why the Epever running a lot cooler? The Victron is probably dissipating 30-40 Watts, 10-12% of the power delivered to the batteries.

In the last 3 months we have encountered two RV's with Victron Smartsolar 100/30 MPPT's with very high (65+ C) heatsink temperature. In both cases, the controllers are connected to four 110W panels in series and were delivering 28-30 Amps to the bank. IR camera showed the entire heatsink glowing...

Mods: If this doesn't belong here, please move it. Amazon requires registered trademarks & brand names for items sold on its platform. It's a lot easier to get the USPTO to approve if the trademarks & brand names are unique.

Electrodacus is not a MPPT controller. It uses a relay to connect the panels to the batteries like a PWM but fully disconnects at absorption voltage, unlike a PWM which adjust the duty cycle to maintain the absorption voltage for a specified period.

You're getting 300 Ah at 48V! The overall energy is 300Ah times 48V = 14400 Watt-hrs your 24V system was 450 Ah @ 24V with a energy capacity of 10800 Watt-hrs.

The resting voltage of a fully charged (100%) 12V LFP battery is 13.8. Your Victron appears to be accurate, showing a net draw of 25Ah from a 600 Ah bank or 96% SoC.

use a timer driven switch to switch the input of MPPT from the panels in the east, south & west sequentially.

not quite! 2023 Autumnal equinox is at SEP 23 2023 250 AM EDT https://www.weather.gov/media/ind/seasons.pdf

A a new 220 Watt nameplate panel would have a Voc*Isc value that is 10-20% higher. The ratio Isc*Voc and Imp*Vmp is called the Fill Factor. On a clear day, properly orient the panel to the Sun & measure the Isc. Compare the measured Isc to the value on the label. It should be close. Voc (or Vmp)...

An option - a Bogart Trimetric & its WiFi Module. The WiFi range is 300+ ft in unobstructed settings. The battery info is presented on a local web page the module serves, so OS agnostic. It can also join your starlink router & be accessible remotely.

+0.05%/C for Isc vs -0.5%/C Voc If the panel is at 45C, Isc goes up by 1%. For OP's panels' this amount to about 85 mA.

I assume you're measuring the open circuit voltage & short circuit current. The product of these values will always be higher than max power value (Imp*Vmp). However, Voc and Vmp track each other in a 1-1 manner. So, if the Voc of a used panel is X% below the nameplate spec, you can...

Think of Amps as gallons/min flow rate. One Amp is equal to 1 Coulomb of charge flow per second. In your case, the MPPT controller sends 100 Amps to the battery thru the positive cable and 100 Amps comes out of the battery thru the negative cable and goes back to the controller. In that process...

This post is about stock market investing. Not sure if it belongs here; mods, please move/delete it if inappropriate. I recently discovered that Dragonfly Energy, the makers of Battleborn batteries, went public last October under the symbol DFLI. I have been following DFLI for the past few...

with an inverter!

100-150 Amps @ 12V DC works out to 1200 to 1800 Watts. At that level, you're better off converting 12V DC into 120VAC and then using a 120VAC battery charger. Straight DC-DC would require the use of very thick wiring (2/0 or better).

The panels were in series for the MPPT and so, there was sufficient headroom. I didn't measure each panel's output voltage, but the string's voltage a little over 75V. so the individual panel voltages must have been around 15V. I used 5 panels simply to max out each controller. With four (or...

Under the ambient conditions of the test today, yes, a MPPT performed slightly worse than the PWM. As I explained earlier, the panels were at 55C. This alone causes a 15% drop in their Vmp. The Epever MPPT was not mis-configured. There are some factors to consider in the MPPT vs PWM debate. In...

all panels in series for MPPT and all in parallel for PWM. Panel Isc 6.85A & Imp 6.25A

There's a lot of misconception expressed in this thread as to what MPPT & PWM controllers are. MPPT controllers do use a PWM circuit block but not in the simpler way that a PWM controller uses. The PWM circuit in an MPPT controller changes the duty cycle of the buck converter switches, which...

Interesting timing - I just finished a test of 30A MPPT & a 30A PWM close to their rated capacities - five 100 Watt panels in series for the MPPT & parallel for the PWM. The MPPT delivered 28.5 Amps to a 12V battery (battery voltage 13.5V) and the PWM delivered 30-31 Amps. This result is what I...

The output will still be the same, since the current is limited by single panels. This is a lot like a long single lane road that has a short segment of two lanes; the max traffic is determined by the single lane section.

I misunderstood the configuration. The output will be exactly that of a simple five panels in series. The current in a series circuit will be limited to the current of the weakest panel; since the panels are identical, the current will be that of a single panel. The voltage will add up.

Your string will behave like a 4S, with a current of one panel & 4X voltage of a single panel. The two panels that are connected in parallel will be producing approx 50% of their rated power.

take a look at WF-2030, a WiFi 'dongle' that connects to a trimetric battery monitor

It's already possible. Simply enclose the two sides of a heat pump. One side gets cold & and the side gets hot. When the temperature in these enclosed spaces exceed some limits, dampers divert the cold (or heat) to the ambient.

The Trimetric (I assume others, too) uses the efficiency setting to derate the charging Amps (only). If you draw X Ah, it'll deduct it from the remaining capacity.. However, if return X Ah tot he battery, it'll record less than X Ah; exactly how much is set by the efficiency value.

I think you're onto something. All shunt based monitors measure a tiny voltage across the shunt & use this to figure out the current. Since the shunts are usually near the battery and are exposed to the corrosive environment, there can be some level of corrosion on the voltage sensing terminals...

Conductive cars tires from the horse's mouth - https://www.goodyear.com/en-US/learn/tire-basics/why-are-tires-black Electrical grounding of railcars & trucks - https://www.saferack.com/truck-grounding-railcar-grounding-necessary/ Anytime you have a lot of metal that is not electrically...

You're not alone! My comments to Will's Youtube videos have been blocked even when relevant to the videos' topics but counter to his messages. And, like you, I have an advanced degree in hard science and decades of experience in this field. Coming back to the topic of needing an earth ground -...

The secret to prolonging FLA battery life is to charge them until the electrolyte's sp. gravity is above 1.280 and levels off. The levelling off indicates that there's no residual lead sulfate left over. This usually occurs we have returned to the battery close to 20% more Amp-hrs than the...

Bogart has a Wifi dongle for the monitor that may work for you