Thanks cvg for the tip.
Normal inverters dont cut it, because the power delivered by the solar array is variable, but the output of the inverter should always be the same. The pump should be able to run fast when there is a lot of sun, and slow when there is little.
By the way BigInch...
Well we need to filter a certain amount of m3 per day. So if this is to be done with solar we should have an efficient filter, because that is the biggest energy sucker. I'm finding it offensive that manufacturers don't even have a pressure-drop curve for their sand filters.
I'm in provincia...
Gravity filtering might be interesting. The issue will probably that it cant filter enough water over the day. Normally a the filter should filter a volume equivalent to the pools capacity. So 50m3 of water -> 50m3 filtered/day.
VFC + AC pump could be the way to go. Really the VFC you mean is...
Thanks for the reply.
As you say, there are multiple solutions, the problem is to find an adequate one.
To put the thing into perspective:
A 3/4 Hp centrifugal AC pump costs about 200€.
A 3/4 Hp centrifugal DC pump with its controller costs 1200€.
(From experience i know that 600W panels is...
I am looking for pumps suitable for pool filtering that can run on DC current.
I know about one company (Lorentz) that sells these pumps but the price seems abusive if compared to an AC pump of similar capacity.
What I need is a pump that can handle a volume of about 15m3/h at 1.5 bar(loses...
