Charshafian
New Member
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- Nov 17, 2019
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Hello everyone! I'm Richard (Rick), Just purchased a new 5th wheel RV and am excited to add solar panels, inverter charger and lithium battery.
Greetings from Las Vegas
- Thread starter Charshafian
- Start date
I love it here. Great place for solar :D
Off Grid Circuits
Solar Electrical Engineer
greetings
Hello Forum members,
Skywagon is a new member even thou I have been following Will's videos (. . a very smart young man).
My current interest is to upgrade a class A RV to lithium 12v batteries for "house" batteries, and not breaking the bank doing the conversion.
Skywagon is a new member even thou I have been following Will's videos (. . a very smart young man).
My current interest is to upgrade a class A RV to lithium 12v batteries for "house" batteries, and not breaking the bank doing the conversion.
Does the Victron Energy Lithium have a regulated output?
Off Grid Circuits
Solar Electrical Engineer
I'm not sure what "regulated output" means to you?
Here's a link to a video by Will Prowse discussing regulated output:
HBD.Offroad
New Member
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- Nov 17, 2019
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Born and Raised! I'm trying to get out, and seek greener pastures ?
Off Grid Circuits
Solar Electrical Engineer
Ok, you were talking about solar generators and I was referring to Lithium Batteries.
Off Grid Circuits
Solar Electrical Engineer
Your use will be thru an inverter for AC loads. Nearly every inverter made as an input protection circuit that will cut power if voltage gets too low. On the battery side, the BMS will monitor cell voltage and cut output before damaging the battery (if it's designed that way, and it should). For DC loads, it's not really important to regulate the output. Sometimes one may want to design a fixed and isolated DC output from their batteries to the power system. This would often be in a 24V power system that steps down to a house battery 12V. Then it's precisely regulated but in a plain 12V system, A DC motor will slow down or a light will dim when voltage is low, but will not damage it in an RV scenario.
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Thank you for your response. It emphasizes the importance of built-in battery protection designed into a system. I might misunderstand Will's perspective but I think he is asking for manufacturers to go the extra mile to also build in voltage regulation so that a system will output the same voltage whether the battery is at 100 per cent or at 20 per cent, not just cut out. I don't really know if more can be done on the battery side to ensure this.
Thanks for the info to start my review for a system that would work with my budget. I have an EE background, thus, building an economical system should not be a problem. I would appreciated advice and leads for buying cells (Chinese..?) and making up a custom battery to suit my cabinet space and power needs....
Off Grid Circuits
Solar Electrical Engineer
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It can be done, but you sacrifice overhead and cost and, why build it in, when it's not used. Maybe in medical devices or other applications it would be necessary. I'm sure JPL has all this figured out for Mars Rovers, but may be too expensive or impractical for an off the shelf product which is designed to make a profit.
krby
Solar Enthusiast
I would prefer a battery be a battery. If I want regulated output, I'll buy a product that does that. I imagine the folks that want regulated output probably want some connectors other than raw battery terminals. Now you're starting to talk about an "electric generator", which is an integrated product that requires more parts, testing, etc.
Will just reviewed a Titan Solar Generator produced by PointZero (prototype) which appears to solve the problem, and it looks like it books at $2995 for a 2200 watt-hour system. That's a little steep for my budget but I may need to pay the piper if I can't figure out how to engineer the voltage regulation on a D-I-Y unit. Anyway, thanks again.
krby
Solar Enthusiast
Wiring up a pretty high power voltage regulator isn't that difficult. We can help you with the advice on designing the system and the putting together the parts.
It all starts with figuring out what it is you want to power and for how long. From that we can decide on the regulated output voltage, and how many amps you'll need along with how many watt hours. With that, you can select some batteries, a charger, and a voltage regulator.
It all starts with figuring out what it is you want to power and for how long. From that we can decide on the regulated output voltage, and how many amps you'll need along with how many watt hours. With that, you can select some batteries, a charger, and a voltage regulator.
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