question

donkeydave1980 avatar image

100/30 wiring diagram

I brought the 100/30 mppt charge controller wanting a full wiring diagram picture how to wire it up as I'm not sure. solar panels to unit to battery and do I need to put a fuse or circuit breaker somewhere what size if I do any help would be great thanks I have 1 300w solar panel and two 12v batteries

MPPT - Solar Charge Controllerwiring
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2 Answers
Guy Stewart (Victron Community Manager) avatar image

Hi Dave,

I am working on some more diagrams for different kinds of systems right now.

For now, have you seen this one?

https://www.victronenergy.com/live/_media/battery_compatibility:byd-example-diagram-2018-07-21.png

There are many features that are not applicable to your system, but it does show the connections and circuit protection for an MPPT, panels and battery.

The size of the fuse depends entirely on the size of the wire. Rainbow Power Company has some good (if a little old) free resources about what size fuses to use, for what size wires, for what size loads. Have a look https://www.rpc.com.au/information/faq/cables-fuses/do-it-yourself.html

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Great schematic - more please!

To the second point, may I suggest Victron have it's own cabling, fusing/circuit protection standards and battery sizing charts or calculators (like Rainbow Power Company) linked to every product on the website (because nobody reads the manuals). If relevant from a newbie point of view it would probably reduce the stress for all Victron virgins and the repetitive workload for Victron tech support.

I agree entirely, and step by step the day will come!

A comprehensive Victron wiring guide is very close to publication.

I will be using it to create more end-user and installer friendly support materials.

WKirby avatar image

Hello Dave

There are various ways of wiring things depending upon what equipment you have. It's all subjective, so there really is no definitive wiring diagram.

Some more information would help us. How many solar panels do you have, and what rating are they (or if you can provide a model number)? What battery bank do you have? 12V, 24V or what? How many individual battery blocks do you have?

Fuses and circuit breaks are always advisable, but again, their rating is subjective.

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one 300w solar panel two 100amp amg batteries 12v