[MrB]

You need a huge dose of “Steve Harris”.

First off, forget powering your 750W deep well pump. That’s out. And 100W of panel just isn’t going to cut it - ever.

Here’s your primary resource -
http://www.solar1234.com

Listen to his interviews on the topic, and you’ll get a more reasonable expectation of what you can do.
Also, he has equipment lists of things that he’s tried out and approves of. Great guy.

[Shaun_MD]

Thanks!