Liferay and <portlet:renderURL> to a friendly URL - href

Question

I have created a page with a friendly URL of /balance-inquiries. The full URL given within the Liferay Admin's Site Pages page is http://localhost:8080/group/guest/balance-inquiries.
Creating a renderUrl (or an actionUrl) to this page, from another page is proving to be a bit frustrating. Below is one of many variations I have tried to get this working.
<portlet:renderURL var="searchTransactionsUrl">
<portlet:param name="mvcPath" value="/balance-inquiries" />
</portlet:renderURL>
Search LPC Transactions
My question is what param values should I use to make this link work? Or should I resort to a redirect, or using instead?
Thanks in advance.

Answer 1

I've figured out how to build dynamic URLs for portlets spanning different WAR files. The code is as follows:
<portlet:defineObjects />
<liferay-theme:defineObjects />
<%
String portletId = "giftcardtransactionfilesummary_WAR_myportalgiftcardportlet";
long otherPlid = PortalUtil.getPlidFromPortletId(themeDisplay.getScopeGroupId(), portletId);
%>
<liferay-portlet:renderURL var="giftcardTransactionFileSummaryUrl" plid="<%=otherPlid%>" portletName="<%=portletId%>">
<liferay-portlet:param name="groupId" value="10157" />
<liferay-portlet:param name="articleId" value="11385" />
</liferay-portlet:renderURL>
view giftcard batch files
The tricks are as follows:
Understanding the naming convention behind Liferay-generated
portletIds
Adding < liferay-theme:defineObjects /> to your page, as
that injects a value for themeDisplay
Other than that, adding the necessary #page and #taglib directives, and all should work.

Answer 2

You don't create render or action urls to pages, but to portlets.
If you want to pass parameters between portlets on the same page, use inter portlet communication.
If you want to redirect to a page with different portlet, make your portlet configurable and specify the page url in the portlet preferences. In general, you don't know the page where the target portlet will be placed to. It can be a single page or multiple pages or anything.
If you want to pass parameters to a portlet on a different page, make the page url configurable and pass the parameters through friendly url.