htx_overland
New Member
- Joined
- Aug 7, 2020
- Messages
- 16
HI,
After a lot of debate, we're planning to go with a high SEER minisplit for our rig. Seems like it is cheaper to buy a higher efficiency unit than a larger power system(and we running short of room for panels). But....the high SEER units are almost all 208/203 single phase.
Looked at a lot of options, but have it paired down to 3. Right now the options are all built around victron, but may look at brands once the general design is a little further down the line. Pricing out these options they are all within about 10% of each other.
My battery bank is 24v.
Wanted to see if the forum has experience that might help prioritize the options - or can kick in an even better option.
1] Dedicated 240v inverter for minisplit.
<> Multiplus 24/3000/70 120V for 120v needs & shore power /charging
<> Phoenix 24/3000 240v for the minisplit
+ Pretty simple design
+ Can turn off the Phoenix when AC is not in use to minimize power draw
+ Splitting the load between 120 & 240 load may keep the inverters closer to their peak efficiency (I think max eff is at about 20-30% load)
+ Highest max efficiency of the options (~94%)
2] Dual Multiplus in split phase
<> 2x Multiplus 24/3000/70 120V
+ Potential redundancy for 120v (would probably require swapping, but gear would be there)
+ ?? might have 2x the charging power from shore - most of these options
- Higher base load (2x the idle consumption) if 120v are shared on different 120v legs
- Or legs are imbalanced with 1 Multiplus only having the 2nd leg of the AC so it can be shut off
3] Larger Multiplus with Autotransformer
<> Multiplus 24/5000/120
<> Autotransformer 100A
+ Like 1] - simple design
+ More shore power / charging vs 1]
+ More 120v capacity if I needed it when the AC is off
- Can't cut the 0 load/search loss as 1] (30w/10w vs 20w/8w)
Thanks!
After a lot of debate, we're planning to go with a high SEER minisplit for our rig. Seems like it is cheaper to buy a higher efficiency unit than a larger power system(and we running short of room for panels). But....the high SEER units are almost all 208/203 single phase.
Looked at a lot of options, but have it paired down to 3. Right now the options are all built around victron, but may look at brands once the general design is a little further down the line. Pricing out these options they are all within about 10% of each other.
My battery bank is 24v.
Wanted to see if the forum has experience that might help prioritize the options - or can kick in an even better option.
1] Dedicated 240v inverter for minisplit.
<> Multiplus 24/3000/70 120V for 120v needs & shore power /charging
<> Phoenix 24/3000 240v for the minisplit
+ Pretty simple design
+ Can turn off the Phoenix when AC is not in use to minimize power draw
+ Splitting the load between 120 & 240 load may keep the inverters closer to their peak efficiency (I think max eff is at about 20-30% load)
+ Highest max efficiency of the options (~94%)
2] Dual Multiplus in split phase
<> 2x Multiplus 24/3000/70 120V
+ Potential redundancy for 120v (would probably require swapping, but gear would be there)
+ ?? might have 2x the charging power from shore - most of these options
- Higher base load (2x the idle consumption) if 120v are shared on different 120v legs
- Or legs are imbalanced with 1 Multiplus only having the 2nd leg of the AC so it can be shut off
3] Larger Multiplus with Autotransformer
<> Multiplus 24/5000/120
<> Autotransformer 100A
+ Like 1] - simple design
+ More shore power / charging vs 1]
+ More 120v capacity if I needed it when the AC is off
- Can't cut the 0 load/search loss as 1] (30w/10w vs 20w/8w)
Thanks!